FE Configuration

FE parameters are classified into dynamic parameters and static parameters.

Dynamic parameters can be configured and adjusted by running SQL commands, which is very convenient. But the configurations become invalid if you restart your FE. Therefore, we recommend that you also modify the configuration items in the CelerData Cloud BYOC console to prevent the loss of modifications.
Static parameters can only be configured and adjusted in the ClerData Cloud BYOC console.

Sign in to the CelerData Cloud BYOC console.
On the Clusters page, click the cluster that you want to configure.
On the cluster details page, click the Cluster parameters tab.
In the FE Node static configuration section, click View all parameter list.
In the dialog box that appears, click New parameter.
Enter the name of the static parameter you want to configure in the Parameter key field, and the parameter value you want to set in the Value field. For the details of the parameters you can configure, see Usage notes.
Click the save button next to the Value field to save the record of the parameter change.
After configuring all the parameters you want to change, click Save changes to save the changes.
To allow the changes to take effect, you can either manually suspend and resume the cluster whenever you find suitable, or click Apply to all nodes in the FE Node static configuration section to restart the cluster instantly.

View FE configuration items

After your FE is started, you can run the ADMIN SHOW FRONTEND CONFIG command on your MySQL client to check the parameter configurations. If you want to query the configuration of a specific parameter, run the following command:

ADMIN SHOW FRONTEND CONFIG [LIKE "pattern"];

For detailed description of the returned fields, see ADMIN SHOW CONFIG.

note

You must have administrator privileges to run cluster administration-related commands.

Configure FE parameters

Configure FE dynamic parameters

You can configure or modify the settings of FE dynamic parameters using ADMIN SET FRONTEND CONFIG.

ADMIN SET FRONTEND CONFIG ("key" = "value");

note

The configuration changes made with ADMIN SET FRONTEND will be restored to the default values after the FE restarts. Therefore, we recommend that you also modify the configuration items in CelerData Cloud BYOC console if you want the changes to be permanent.

Configure FE static parameters

note

Static parameters of an FE are set by changing them in the CelerData Cloud BYOC console and restarting the FE to allow the changes to take effect.

Understand FE parameters

Logging

log_roll_size_mb

Default: 1024
Type: Int
Unit: MB
Is mutable: No
Description: The maximum size of a system log file or an audit log file.
Introduced in: -

sys_log_dir

Default: StarRocksFE.STARROCKS_HOME_DIR + "/log"
Type: String
Unit: -
Is mutable: No
Description: The directory that stores system log files.
Introduced in: -

sys_log_level

Default: INFO
Type: String
Unit: -
Is mutable: No
Description: The severity levels into which system log entries are classified. Valid values: INFO, WARN, ERROR, and FATAL.
Introduced in: -

sys_log_roll_num

Default: 10
Type: Int
Unit: -
Is mutable: No
Description: The maximum number of system log files that can be retained within each retention period specified by the sys_log_roll_interval parameter.
Introduced in: -

sys_log_verbose_modules

Default: Empty string
Type: String[]
Unit: -
Is mutable: No
Description: The modules for which StarRocks generates system logs. If this parameter is set to org.apache.starrocks.catalog, StarRocks generates system logs only for the catalog module. Separate the module names with a comma (,) and a space.
Introduced in: -

sys_log_roll_interval

Default: DAY
Type: String
Unit: -
Is mutable: No
Description: The time interval at which StarRocks rotates system log entries. Valid values: DAY and HOUR.
- If this parameter is set to DAY, a suffix in the yyyyMMdd format is added to the names of system log files.
- If this parameter is set to HOUR, a suffix in the yyyyMMddHH format is added to the names of system log files.
Introduced in: -

sys_log_delete_age

Default: 7d
Type: String
Unit: -
Is mutable: No
Description: The retention period of system log files. The default value 7d specifies that each system log file can be retained for 7 days. StarRocks checks each system log file and deletes those that were generated 7 days ago.
Introduced in: -

audit_log_dir

Default: StarRocksFE.STARROCKS_HOME_DIR + "/log"
Type: String
Unit: -
Is mutable: No
Description: The directory that stores audit log files.
Introduced in: -

audit_log_roll_num

Default: 90
Type: Int
Unit: -
Is mutable: No
Description: The maximum number of audit log files that can be retained within each retention period specified by the audit_log_roll_interval parameter.
Introduced in: -

audit_log_modules

Default: slow_query, query
Type: String[]
Unit: -
Is mutable: No
Description: The modules for which StarRocks generates audit log entries. By default, StarRocks generates audit logs for the slow_query module and the query module. The connection module is supported from v3.0. Separate the module names with a comma (,) and a space.
Introduced in: -

qe_slow_log_ms

Default: 5000
Type: Long
Unit: Milliseconds
Is mutable: Yes
Description: The threshold used to determine whether a query is a slow query. If the response time of a query exceeds this threshold, it is recorded as a slow query in fe.audit.log.
Introduced in: -

audit_log_roll_interval

Default: DAY
Type: String
Unit: -
Is mutable: No
Description: The time interval at which StarRocks rotates audit log entries. Valid values: DAY and HOUR.
- If this parameter is set to DAY, a suffix in the yyyyMMdd format is added to the names of audit log files.
- If this parameter is set to HOUR, a suffix in the yyyyMMddHH format is added to the names of audit log files.
Introduced in: -

audit_log_delete_age

Default: 30d
Type: String
Unit: -
Is mutable: No
Description: The retention period of audit log files. The default value 30d specifies that each audit log file can be retained for 30 days. StarRocks checks each audit log file and deletes those that were generated 30 days ago.
Introduced in: -

dump_log_dir

Default: StarRocksFE.STARROCKS_HOME_DIR + "/log"
Type: String
Unit: -
Is mutable: No
Description: The directory that stores dump log files.
Introduced in: -

dump_log_roll_num

Default: 10
Type: Int
Unit: -
Is mutable: No
Description: The maximum number of dump log files that can be retained within each retention period specified by the dump_log_roll_interval parameter.
Introduced in: -

dump_log_modules

Default: query
Type: String[]
Unit: -
Is mutable: No
Description: The modules for which StarRocks generates dump log entries. By default, StarRocks generates dump logs for the query module. Separate the module names with a comma (,) and a space.
Introduced in: -

dump_log_roll_interval

Default: DAY
Type: String
Unit: -
Is mutable: No
Description: The time interval at which StarRocks rotates dump log entries. Valid values: DAY and HOUR.
- If this parameter is set to DAY, a suffix in the yyyyMMdd format is added to the names of dump log files.
- If this parameter is set to HOUR, a suffix in the yyyyMMddHH format is added to the names of dump log files.
Introduced in: -

dump_log_delete_age

Default: 7d
Type: String
Unit: -
Is mutable: No
Description: The retention period of dump log files. The default value 7d specifies that each dump log file can be retained for 7 days. StarRocks checks each dump log file and deletes those that were generated 7 days ago.
Introduced in: -

Server

frontend_address

Default: 0.0.0.0
Type: String
Unit: -
Is mutable: No
Description: The IP address of the FE node.
Introduced in: -

priority_networks

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: Declares a selection strategy for servers that have multiple IP addresses. Note that at most one IP address must match the list specified by this parameter. The value of this parameter is a list that consists of entries, which are separated with semicolons (;) in CIDR notation, such as 10.10.10.0/24. If no IP address matches the entries in this list, an IP address will be randomly selected.
Introduced in: -

http_port

Default: 8030
Type: Int
Unit: -
Is mutable: No
Description: The port on which the HTTP server in the FE node listens.
Introduced in: -

http_worker_threads_num

Default: 0
Type: Int
Unit: -
Is mutable: No
Description: Number of worker threads for http server to deal with http requests. For a negative or 0 value, the number of threads will be twice the number of cpu cores.
Introduced in: v2.5.18, v3.0.10, v3.1.7, v3.2.2

http_backlog_num

Default: 1024
Type: Int
Unit: -
Is mutable: No
Description: The length of the backlog queue held by the HTTP server in the FE node.
Introduced in: -

cluster_name

Default: StarRocks Cluster
Type: String
Unit: -
Is mutable: No
Description: The name of the StarRocks cluster to which the FE belongs. The cluster name is displayed for Title on the web page.
Introduced in: -

rpc_port

Default: 9020
Type: Int
Unit: -
Is mutable: No
Description: The port on which the Thrift server in the FE node listens.
Introduced in: -

thrift_server_max_worker_threads

Default: 4096
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of worker threads that are supported by the Thrift server in the FE node.
Introduced in: -

thrift_server_queue_size

Default: 4096
Type: Int
Unit: -
Is mutable: No
Description: The length of queue where requests are pending. If the number of threads that are being processed in the thrift server exceeds the value specified in thrift_server_max_worker_threads, new requests are added to the pending queue.
Introduced in: -

thrift_client_timeout_ms

Default: 5000
Type: Int
Unit: Milliseconds
Is mutable: No
Description: The length of time after which idle client connections time out.
Introduced in: -

thrift_backlog_num

Default: 1024
Type: Int
Unit: -
Is mutable: No
Description: The length of the backlog queue held by the Thrift server in the FE node.
Introduced in: -

brpc_idle_wait_max_time

Default: 10000
Type: Int
Unit: ms
Is mutable: No
Description: The maximum length of time for which bRPC clients wait as in the idle state.
Introduced in: -

query_port

Default: 9030
Type: Int
Unit: -
Is mutable: No
Description: The port on which the MySQL server in the FE node listens.
Introduced in: -

mysql_nio_backlog_num

Default: 1024
Type: Int
Unit: -
Is mutable: No
Description: The length of the backlog queue held by the MySQL server in the FE node.
Introduced in: -

mysql_service_nio_enabled

Default: true
Type: Boolean
Unit: -
Is mutable: No
Description: Specifies whether asynchronous I/O is enabled for the FE node.
Introduced in: -

mysql_service_io_threads_num

Default: 4
Type: Int
Unit: -
Is mutable: No
Description: The maximum number of threads that can be run by the MySQL server in the FE node to process I/O events.
Introduced in: -

max_mysql_service_task_threads_num

Default: 4096
Type: Int
Unit: -
Is mutable: No
Description: The maximum number of threads that can be run by the MySQL server in the FE node to process tasks.
Introduced in: -

mysql_server_version

Default: 5.1.0
Type: String
Unit: -
Is mutable: Yes
Description: The MySQL server version returned to the client. Modifying this parameter will affect the version information in the following situations:
1. select version();
2. Handshake packet version
3. Value of the global variable version (show variables like 'version';)
Introduced in: -

qe_max_connection

Default: 4096
Type: Int
Unit: -
Is mutable: No
Description: The maximum number of connections that can be established by all users to the FE node. From v3.1.12 and v3.2.7 onwards, the default value has been changed from 1024 to 4096.
Introduced in: -

max_connection_scheduler_threads_num

Default: 4096
Type: Int
Unit: -
Is mutable: No
Description: The maximum number of threads that are supported by the connection scheduler.
Introduced in: -

Metadata and cluster management

cluster_id

Default: -1
Type: Int
Unit: -
Is mutable: No
Description: The ID of the StarRocks cluster to which the FE belongs. FEs or BEs that have the same cluster ID belong to the same StarRocks cluster. Valid values: any positive integer. The default value -1 specifies that StarRocks will generate a random cluster ID for the StarRocks cluster at the time when the leader FE of the cluster is started for the first time.
Introduced in: -

meta_dir

Default: StarRocksFE.STARROCKS_HOME_DIR + "/meta"
Type: String
Unit: -
Is mutable: No
Description: The directory that stores metadata.
Introduced in: -

edit_log_type

Default: BDB
Type: String
Unit: -
Is mutable: No
Description: The type of edit log that can be generated. Set the value to BDB.
Introduced in: -

edit_log_port

Default: 9010
Type: Int
Unit: -
Is mutable: No
Description: The port that is used for communication among the Leader, Follower, and Observer FEs in the cluster.
Introduced in: -

edit_log_roll_num

Default: 50000
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of metadata log entries that can be written before a log file is created for these log entries. This parameter is used to control the size of log files. The new log file is written to the BDBJE database.
Introduced in: -

ignore_unknown_log_id

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to ignore an unknown log ID. When an FE is rolled back, the FEs of the earlier version may be unable to recognize some log IDs. If the value is TRUE, the FE ignores unknown log IDs. If the value is FALSE, the FE exits.
Introduced in: -

meta_delay_toleration_second

Default: 300
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The maximum duration by which the metadata on the follower and observer FEs can lag behind that on the leader FE. Unit: seconds. If this duration is exceeded, the non-leader FEs stops providing services.
Introduced in: -

master_sync_policy

Default: SYNC
Type: String
Unit: -
Is mutable: No
Description: The policy based on which the leader FE flushes logs to disk. This parameter is valid only when the current FE is a leader FE. Valid values:
- SYNC: When a transaction is committed, a log entry is generated and flushed to disk simultaneously.
- NO_SYNC: The generation and flushing of a log entry do not occur at the same time when a transaction is committed.
- WRITE_NO_SYNC: When a transaction is committed, a log entry is generated simultaneously but is not flushed to disk.
If you have deployed only one follower FE, we recommend that you set this parameter to SYNC. If you have deployed three or more follower FEs, we recommend that you set this parameter and the replica_sync_policy both to WRITE_NO_SYNC.
Introduced in: -

replica_sync_policy

Default: SYNC
Type: String
Unit: -
Is mutable: No
Description: The policy based on which the follower FE flushes logs to disk. This parameter is valid only when the current FE is a follower FE. Valid values:
- SYNC: When a transaction is committed, a log entry is generated and flushed to disk simultaneously.
- NO_SYNC: The generation and flushing of a log entry do not occur at the same time when a transaction is committed.
- WRITE_NO_SYNC: When a transaction is committed, a log entry is generated simultaneously but is not flushed to disk.
Introduced in: -

replica_ack_policy

Default: SIMPLE_MAJORITY
Type: String
Unit: -
Is mutable: No
Description: The policy based on which a log entry is considered valid. The default value SIMPLE_MAJORITY specifies that a log entry is considered valid if a majority of follower FEs return ACK messages.
Introduced in: -

bdbje_heartbeat_timeout_second

Default: 30
Type: Int
Unit: Seconds
Is mutable: No
Description: The amount of time after which the heartbeats among the leader, follower, and observer FEs in the StarRocks cluster time out.
Introduced in: -

bdbje_replica_ack_timeout_second

Default: 10
Type: Int
Unit: Seconds
Is mutable: No
Description: The maximum amount of time for which the leader FE can wait for ACK messages from a specified number of follower FEs when metadata is written from the leader FE to the follower FEs. Unit: second. If a large amount of metadata is being written, the follower FEs require a long time before they can return ACK messages to the leader FE, causing ACK timeout. In this situation, metadata writes fail, and the FE process exits. We recommend that you increase the value of this parameter to prevent this situation.
Introduced in: -

bdbje_lock_timeout_second

Default: 1
Type: Int
Unit: Seconds
Is mutable: No
Description: The amount of time after which a lock in the BDB JE-based FE times out.
Introduced in: -

bdbje_reset_election_group

Default: false
Type: String
Unit: -
Is mutable: No
Description: Whether to reset the BDBJE replication group. If this parameter is set to TRUE, the FE will reset the BDBJE replication group (that is, remove the information of all electable FE nodes) and start as the leader FE. After the reset, this FE will be the only member in the cluster, and other FEs can rejoin this cluster by using ALTER SYSTEM ADD/DROP FOLLOWER/OBSERVER 'xxx'. Use this setting only when no leader FE can be elected because the data of most follower FEs have been damaged. reset_election_group is used to replace metadata_failure_recovery.
Introduced in: -

max_bdbje_clock_delta_ms

Default: 5000
Type: Long
Unit: Milliseconds
Is mutable: No
Description: The maximum clock offset that is allowed between the leader FE and the follower or observer FEs in the StarRocks cluster.
Introduced in: -

txn_rollback_limit

Default: 100
Type: Int
Unit: -
Is mutable: No
Description: The maximum number of transactions that can be rolled back.
Introduced in: -

heartbeat_mgr_threads_num

Default: 8
Type: Int
Unit: -
Is mutable: No
Description: The number of threads that can be run by the Heartbeat Manager to run heartbeat tasks.
Introduced in: -

heartbeat_mgr_blocking_queue_size

Default: 1024
Type: Int
Unit: -
Is mutable: No
Description: The size of the blocking queue that stores heartbeat tasks run by the Heartbeat Manager.
Introduced in: -

catalog_try_lock_timeout_ms

Default: 5000
Type: Long
Unit: Milliseconds
Is mutable: Yes
Description: The timeout duration to obtain the global lock.
Introduced in: -

ignore_materialized_view_error

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether FE ignores the metadata exception caused by materialized view errors. If FE fails to start due to the metadata exception caused by materialized view errors, you can set this parameter to true to allow FE to ignore the exception.
Introduced in: v2.5.10

ignore_meta_check

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether non-Leader FEs ignore the metadata gap from the Leader FE. If the value is TRUE, non-Leader FEs ignore the metadata gap from the Leader FE and continue providing data reading services. This parameter ensures continuous data reading services even when you stop the Leader FE for a long period of time. If the value is FALSE, non-Leader FEs do not ignore the metadata gap from the Leader FE and stop providing data reading services.
Introduced in: -

drop_backend_after_decommission

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to delete a BE after the BE is decommissioned. TRUE indicates that the BE is deleted immediately after it is decommissioned. FALSE indicates that the BE is not deleted after it is decommissioned.
Introduced in: -

enable_collect_query_detail_info

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to collect the profile of a query. If this parameter is set to TRUE, the system collects the profile of the query. If this parameter is set to FALSE, the system does not collect the profile of the query.
Introduced in: -

enable_background_refresh_connector_metadata

Default: true in v3.0 and later and false in v2.5
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable the periodic Hive metadata cache refresh. After it is enabled, StarRocks polls the metastore (Hive Metastore or AWS Glue) of your Hive cluster, and refreshes the cached metadata of the frequently accessed Hive catalogs to perceive data changes. true indicates to enable the Hive metadata cache refresh, and false indicates to disable it.
Introduced in: v2.5.5

background_refresh_metadata_interval_millis

Default: 600000
Type: Int
Unit: Milliseconds
Is mutable: Yes
Description: The interval between two consecutive Hive metadata cache refreshes.
Introduced in: v2.5.5

background_refresh_metadata_time_secs_since_last_access_secs

Default: 3600 * 24
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The expiration time of a Hive metadata cache refresh task. For the Hive catalog that has been accessed, if it has not been accessed for more than the specified time, StarRocks stops refreshing its cached metadata. For the Hive catalog that has not been accessed, StarRocks will not refresh its cached metadata.
Introduced in: v2.5.5

enable_statistics_collect_profile

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to generate profiles for statistics queries. You can set this item to true to allow StarRocks to generate query profiles for queries on system statistics.
Introduced in: v3.1.5

metadata_enable_recovery_mode

Default: false
Type: Boolean
Unit: -
Is mutable: No
Description: Whether to enable the metadata recovery mode. When this mode is enabled, if part of the cluster metadata is lost, it can be restored based on the information from BE. Currently, only the version information of partitions can be restored.
Introduced in: v3.3.0

enable_legacy_compatibility_for_replication

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable the Legacy Compatibility for Replication. StarRocks may behave differently between the old and new versions, causing problems during cross-cluster data migration. Therefore, you must enable Legacy Compatibility for the target cluster before data migration and disable it after data migration is completed. true indicates enabling this mode.
Introduced in: v3.1.10, v3.2.6

User, role, and privilege

privilege_max_total_roles_per_user

Default: 64
Type: Int
Unit:
Is mutable: Yes
Description: The maximum number of roles a user can have.
Introduced in: v3.0.0

privilege_max_role_depth

Default: 16
Type: Int
Unit:
Is mutable: Yes
Description: The maximum role depth (level of inheritance) of a role.
Introduced in: v3.0.0

Query engine

publish_version_interval_ms

Default: 10
Type: Int
Unit: Milliseconds
Is mutable: No
Description: The time interval at which release validation tasks are issued.
Introduced in: -

statistic_cache_columns

Default: 100000
Type: Long
Unit: -
Is mutable: No
Description: The number of rows that can be cached for the statistics table.
Introduced in: -

statistic_cache_thread_pool_size

Default: 10
Type: Int
Unit: -
Is mutable: No
Description: The size of the thread-pool which will be used to refresh statistic caches.
Introduced in: -

max_allowed_in_element_num_of_delete

Default: 10000
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of elements allowed for the IN predicate in a DELETE statement.
Introduced in: -

enable_materialized_view

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable the creation of materialized views.
Introduced in: -

enable_materialized_view_spill

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable Intermediate Result Spilling for materialized view refresh tasks.
Introduced in: v3.1.1

enable_backup_materialized_view

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable the BACKUP and RESTORE of asynchronous materialized views when backing up or restoring a specific database. If this item is set to false, StarRocks will skip backing up asynchronous materialized views.
Introduced in: v3.2.0

enable_experimental_mv

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable the asynchronous materialized view feature. TRUE indicates this feature is enabled. From v2.5.2 onwards, this feature is enabled by default. For versions earlier than v2.5.2, this feature is disabled by default.
Introduced in: v2.4

enable_colocate_mv_index

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to support colocating the synchronous materialized view index with the base table when creating a synchronous materialized view. If this item is set to true, tablet sink will speed up the write performance of synchronous materialized views.
Introduced in: v3.2.0

default_mv_refresh_immediate

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to refresh an asynchronous materialized view immediately after creation. When this item is set to true, newly created materialized view will be refreshed immediately.
Introduced in: v3.2.3

enable_materialized_view_metrics_collect

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to collect monitoring metrics for asynchronous materialized views by default.
Introduced in: v3.1.11, v3.2.5

enable_materialized_view_text_based_rewrite

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable text-based query rewrite by default. If this item is set to true, the system builds the abstract syntax tree while creating an asynchronous materialized view.
Introduced in: v3.2.5

enable_mv_automatic_active_check

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable the system to automatically check and re-activate the asynchronous materialized views that are set inactive because their base tables (views) had undergone Schema Change or had been dropped and re-created. Please note that this feature will not re-activate the materialized views that are manually set inactive by users.
Introduced in: v3.1.6

enable_udf

Default: false
Type: Boolean
Unit: -
Is mutable: No
Description: Whether to enable UDF.
Introduced in: -

enable_decimal_v3

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to support the DECIMAL V3 data type.
Introduced in: -

enable_sql_blacklist

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable blacklist check for SQL queries. When this feature is enabled, queries in the blacklist cannot be executed.
Introduced in: -

dynamic_partition_enable

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable the dynamic partitioning feature. When this feature is enabled, StarRocks dynamically creates partitions for new data and automatically deletes expired partitions to ensure the freshness of data.
Introduced in: -

dynamic_partition_check_interval_seconds

Default: 600
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The interval at which new data is checked. If new data is detected, StarRocks automatically creates partitions for the data.
Introduced in: -

max_query_retry_time

Default: 2
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of query retries on an FE.
Introduced in: -

max_create_table_timeout_second

Default: 600
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The maximum timeout duration for creating a table.
Introduced in: -

create_table_max_serial_replicas

Default: 128
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of replicas to create serially. If actual replica count exceeds this value, replicas will be created concurrently. Try to reduce this value if table creation is taking a long time to complete.
Introduced in: -

http_slow_request_threshold_ms

Default: 5000
Type: Int
Unit: Milliseconds
Is mutable: Yes
Description: If the response time for an HTTP request exceeds the value specified by this parameter, a log is generated to track this request.
Introduced in: v2.5.15, v3.1.5

max_partitions_in_one_batch

Default: 4096
Type: Long
Unit: -
Is mutable: Yes
Description: The maximum number of partitions that can be created when you bulk create partitions.
Introduced in: -

max_running_rollup_job_num_per_table

Default: 1
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of rollup jobs can run in parallel for a table.
Introduced in: -

expr_children_limit

Default: 10000
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of child expressions allowed in an expression.
Introduced in: -

max_planner_scalar_rewrite_num

Default: 100000
Type: Long
Unit: -
Is mutable: Yes
Description: The maximum number of times that the optimizer can rewrite a scalar operator.
Introduced in: -

enable_statistic_collect

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to collect statistics for the CBO. This feature is enabled by default.
Introduced in: -

enable_statistic_collect_on_first_load

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to automatically collect statistics when data is loaded into a table for the first time. If a table has multiple partitions, any data loading into an empty partition of this table will trigger automatic statistics collection on this partition. If new tables are frequently created and data is frequently loaded, the memory and CPU overhead will increase.
Introduced in: v3.1

statistic_auto_analyze_start_time

Default: 00:00:00
Type: String
Unit: -
Is mutable: Yes
Description: The start time of automatic collection. Value range: 00:00:00 - 23:59:59.
Introduced in: -

statistic_auto_analyze_end_time

Default: 23:59:59
Type: String
Unit: -
Is mutable: Yes
Description: The end time of automatic collection. Value range: 00:00:00 - 23:59:59.
Introduced in: -

statistic_analyze_status_keep_second

Default: 3 * 24 * 3600
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The duration to retain the history of collection tasks. The default value is 3 days.
Introduced in: -

statistic_collect_interval_sec

Default: 5 * 60
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The interval for checking data updates during automatic collection.
Introduced in: -

statistic_update_interval_sec

Default: 24 * 60 * 60
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The interval at which the cache of statistical information is updated.
Introduced in: -

enable_collect_full_statistic

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable automatic full statistics collection. This feature is enabled by default.
Introduced in: -

statistic_auto_collect_ratio

Default: 0.8
Type: Double
Unit: -
Is mutable: Yes
Description: The threshold for determining whether the statistics for automatic collection are healthy. If statistics health is below this threshold, automatic collection is triggered.
Introduced in: -

statistic_auto_collect_small_table_rows

Default: 10000000
Type: Long
Unit: -
Is mutable: Yes
Description: Threshold to determine whether a table in an external data source (Hive, Iceberg, Hudi) is a small table during automatic collection. If the table has rows less than this value, the table is considered a small table.
Introduced in: v3.2

statistic_max_full_collect_data_size

Default: 100 * 1024 * 1024 * 1024
Type: Long
Unit: bytes
Is mutable: Yes
Description: The size of the largest partition for the automatic collection of statistics. If a partition exceeds this value, then sampled collection is performed instead of full.
Introduced in: -

statistic_collect_max_row_count_per_query

Default: 5000000000
Type: Long
Unit: -
Is mutable: Yes
Description: The maximum number of rows to query for a single analyze task. An analyze task will be split into multiple queries if this value is exceeded.
Introduced in: -

statistic_sample_collect_rows

Default: 200000
Type: Long
Unit: -
Is mutable: Yes
Description: The minimum number of rows to collect for sampled collection. If the parameter value exceeds the actual number of rows in your table, full collection is performed.
Introduced in: -

histogram_buckets_size

Default: 64
Type: Long
Unit: -
Is mutable: Yes
Description: The default bucket number for a histogram.
Introduced in: -

histogram_mcv_size

Default: 100
Type: Long
Unit: -
Is mutable: Yes
Description: The number of most common values (MCV) for a histogram.
Introduced in: -

histogram_sample_ratio

Default: 0.1
Type: Double
Unit: -
Is mutable: Yes
Description: The sampling ratio for a histogram.
Introduced in: -

histogram_max_sample_row_count

Default: 10000000
Type: Long
Unit: -
Is mutable: Yes
Description: The maximum number of rows to collect for a histogram.
Introduced in: -

enable_local_replica_selection

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to select local replicas for queries. Local replicas reduce the network transmission cost. If this parameter is set to TRUE, the CBO preferentially selects tablet replicas on BEs that have the same IP address as the current FE. If this parameter is set to FALSE, both local replicas and non-local replicas can be selected.
Introduced in: -

max_distribution_pruner_recursion_depth

Default: 100
Type: Int
Unit: -
Is mutable: Yes
Description:: The maximum recursion depth allowed by the partition pruner. Increasing the recursion depth can prune more elements but also increases CPU consumption.
Introduced in: -

Loading and unloading

load_straggler_wait_second

Default: 300
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The maximum loading lag that can be tolerated by a BE replica. If this value is exceeded, cloning is performed to clone data from other replicas.
Introduced in: -

load_checker_interval_second

Default: 5
Type: Int
Unit: Seconds
Is mutable: No
Description: The time interval at which load jobs are processed on a rolling basis.
Introduced in: -

broker_load_default_timeout_second

Default: 14400
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The timeout duration for a Broker Load job.
Introduced in: -

min_bytes_per_broker_scanner

Default: 67108864
Type: Long
Unit: Bytes
Is mutable: Yes
Description: The minimum allowed amount of data that can be processed by a Broker Load instance.
Introduced in: -

insert_load_default_timeout_second

Default: 3600
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The timeout duration for the INSERT INTO statement that is used to load data.
Introduced in: -

stream_load_default_timeout_second

Default: 600
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The default timeout duration for each Stream Load job.
Introduced in: -

max_stream_load_timeout_second

Default: 259200
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The maximum allowed timeout duration for a Stream Load job.
Introduced in: -

max_load_timeout_second

Default: 259200
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The maximum timeout duration allowed for a load job. The load job fails if this limit is exceeded. This limit applies to all types of load jobs.
Introduced in: -

min_load_timeout_second

Default: 1
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The minimum timeout duration allowed for a load job. This limit applies to all types of load jobs.
Introduced in: -

spark_dpp_version

Default: 1.0.0
Type: String
Unit: -
Is mutable: No
Description: The version of Spark Dynamic Partition Pruning (DPP) used.
Introduced in: -

spark_load_default_timeout_second

Default: 86400
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The timeout duration for each Spark Load job.
Introduced in: -

spark_home_default_dir

Default: StarRocksFE.STARROCKS_HOME_DIR + "/lib/spark2x"
Type: String
Unit: -
Is mutable: No
Description: The root directory of a Spark client.
Introduced in: -

spark_resource_path

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The root directory of the Spark dependency package.
Introduced in: -

spark_launcher_log_dir

Default: sys_log_dir + "/spark_launcher_log"
Type: String
Unit: -
Is mutable: No
Description: The directory that stores Spark log files.
Introduced in: -

yarn_client_path

Default: StarRocksFE.STARROCKS_HOME_DIR + "/lib/yarn-client/hadoop/bin/yarn"
Type: String
Unit: -
Is mutable: No
Description: The root directory of the Yarn client package.
Introduced in: -

yarn_config_dir

Default: StarRocksFE.STARROCKS_HOME_DIR + "/lib/yarn-config"
Type: String
Unit: -
Is mutable: No
Description: The directory that stores the Yarn configuration file.
Introduced in: -

desired_max_waiting_jobs

Default: 1024
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of pending jobs in an FE. The number refers to all jobs, such as table creation, loading, and schema change jobs. If the number of pending jobs in an FE reaches this value, the FE will reject new load requests. This parameter takes effect only for asynchronous loading. From v2.5 onwards, the default value is changed from 100 to 1024.
Introduced in: -

max_running_txn_num_per_db

Default: 1000
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of load transactions allowed to be running for each database within a StarRocks cluster. The default value is 1000. From v3.1 onwards, the default value is changed to 1000 from 100. When the actual number of load transactions running for a database exceeds the value of this parameter, new load requests will not be processed. New requests for synchronous load jobs will be denied, and new requests for asynchronous load jobs will be placed in queue. We do not recommend you increase the value of this parameter because this will increase system load.
Introduced in: -

max_broker_load_job_concurrency

Default: 5
Alias: async_load_task_pool_size
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of concurrent Broker Load jobs allowed within the StarRocks cluster. This parameter is valid only for Broker Load. The value of this parameter must be less than the value of max_running_txn_num_per_db. From v2.5 onwards, the default value is changed from 10 to 5.
Introduced in: -

load_parallel_instance_num (Deprecated)

Default: 1
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of concurrent loading instances for each load job on a BE. This item is deprecated from v3.1 onwards.
Introduced in: -

disable_load_job

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to disable loading when the cluster encounters an error. This prevents any loss caused by cluster errors. The default value is FALSE, indicating that loading is not disabled. TRUE indicates loading is disabled and the cluster is in read-only state.
Introduced in: -

history_job_keep_max_second

Default: 7 * 24 * 3600
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The maximum duration a historical job can be retained, such as schema change jobs.
Introduced in: -

label_keep_max_second

Default: 3 * 24 * 3600
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The maximum duration in seconds to keep the labels of load jobs that have been completed and are in the FINISHED or CANCELLED state. The default value is 3 days. After this duration expires, the labels will be deleted. This parameter applies to all types of load jobs. A value too large consumes a lot of memory.
Introduced in: -

label_keep_max_num

Default: 1000
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of load jobs that can be retained within a period of time. If this number is exceeded, the information of historical jobs will be deleted.
Introduced in: -

max_routine_load_task_concurrent_num

Default: 5
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of concurrent tasks for each Routine Load job.
Introduced in: -

max_routine_load_task_num_per_be

Default: 16
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of concurrent Routine Load tasks on each BE. Since v3.1.0, the default value for this parameter is increased to 16 from 5, and no longer needs to be less than or equal to the value of BE static parameter routine_load_thread_pool_size (deprecated).
Introduced in: -

max_routine_load_batch_size

Default: 4294967296
Type: Long
Unit: Bytes
Is mutable: Yes
Description: The maximum amount of data that can be loaded by a Routine Load task.
Introduced in: -

routine_load_task_consume_second

Default: 15
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The maximum time for each Routine Load task within the cluster to consume data. Since v3.1.0, Routine Load job supports a new parameter task_consume_second in job_properties. This parameter applies to individual load tasks within a Routine Load job, which is more flexible.
Introduced in: -

routine_load_task_timeout_second

Default: 60
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The timeout duration for each Routine Load task within the cluster. Since v3.1.0, Routine Load job supports a new parameter task_timeout_second in job_properties. This parameter applies to individual load tasks within a Routine Load job, which is more flexible.
Introduced in: -

routine_load_unstable_threshold_second

Default: 3600
Type: Long
Unit: Seconds
Is mutable: Yes
Description: Routine Load job is set to the UNSTABLE state if any task within the Routine Load job lags. To be specific, the difference between the timestamp of the message being consumed and the current time exceeds this threshold, and unconsumed messages exist in the data source.
Introduced in: -

max_tolerable_backend_down_num

Default: 0
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of faulty BE nodes allowed. If this number is exceeded, Routine Load jobs cannot be automatically recovered.
Introduced in: -

period_of_auto_resume_min

Default: 5
Type: Int
Unit: Minutes
Is mutable: Yes
Description: The interval at which Routine Load jobs are automatically recovered.
Introduced in: -

export_task_default_timeout_second

Default: 2 * 3600
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The timeout duration for a data exporting task.
Introduced in: -

export_max_bytes_per_be_per_task

Default: 268435456
Type: Long
Unit: Bytes
Is mutable: Yes
Description: The maximum amount of data that can be exported from a single BE by a single data unload task.
Introduced in: -

export_task_pool_size

Default: 5
Type: Int
Unit: -
Is mutable: No
Description: The size of the unload task thread pool.
Introduced in: -

export_checker_interval_second

Default: 5
Type: Int
Unit: Seconds
Is mutable: No
Description: The time interval at which load jobs are scheduled.
Introduced in: -

export_running_job_num_limit

Default: 5
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of data exporting tasks that can run in parallel.
Introduced in: -

empty_load_as_error

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to return an error message "all partitions have no load data" if no data is loaded. Valid values:
- true: If no data is loaded, the system displays a failure message and returns an error "all partitions have no load data".
- false: If no data is loaded, the system displays a success message and returns OK, instead of an error.
Introduced in: -

external_table_commit_timeout_ms

Default: 10000
Type: Int
Unit: Milliseconds
Is mutable: Yes
Description: The timeout duration for committing (publishing) a write transaction to a StarRocks external table. The default value 10000 indicates a 10-second timeout duration.
Introduced in: -

enable_sync_publish

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to synchronously execute the apply task at the publish phase of a load transaction. This parameter is applicable only to Primary Key tables. Valid values:
- TRUE (default): The apply task is synchronously executed at the publish phase of a load transaction. It means that the load transaction is reported as successful only after the apply task is completed, and the loaded data can truly be queried. When a task loads a large volume of data at a time or loads data frequently, setting this parameter to true can improve query performance and stability, but may increase load latency.
- FALSE: The apply task is asynchronously executed at the publish phase of a load transaction. It means that the load transaction is reported as successful after the apply task is submitted, but the loaded data cannot be immediately queried. In this case, concurrent queries need to wait for the apply task to complete or time out before they can continue. When a task loads a large volume of data at a time or loads data frequently, setting this parameter to false may affect query performance and stability.
Introduced in: v3.2.0

label_clean_interval_second

Default: 4 * 3600
Type: Int
Unit: Seconds
Is mutable: No
Description: The time interval at which labels are cleaned up. Unit: second. We recommend that you specify a short time interval to ensure that historical labels can be cleaned up in a timely manner.
Introduced in: -

transaction_clean_interval_second

Default: 30
Type: Int
Unit: Seconds
Is mutable: No
Description: The time interval at which finished transactions are cleaned up. Unit: second. We recommend that you specify a short time interval to ensure that finished transactions can be cleaned up in a timely manner.
Introduced in: -

Storage

default_replication_num

Default: 3
Type: Short
Unit: -
Is mutable: Yes
Description: Sets the default number of replicas for each data partition when creating a table in StarRocks. This setting can be overridden when creating a table by specifying replication_num=x in the CREATE TABLE DDL.
Introduced in: -

enable_strict_storage_medium_check

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether the FE strictly checks the storage medium of BEs when users create tables. If this parameter is set to TRUE, the FE checks the storage medium of BEs when users create tables and returns an error if the storage medium of the BE is different from the storage_medium parameter specified in the CREATE TABLE statement. For example, the storage medium specified in the CREATE TABLE statement is SSD but the actual storage medium of BEs is HDD. As a result, the table creation fails. If this parameter is FALSE, the FE does not check the storage medium of BEs when users create a table.
Introduced in: -

catalog_trash_expire_second

Default: 86400
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The longest duration the metadata can be retained after a database, table, or partition is dropped. If this duration expires, the data will be deleted and cannot be recovered through the RECOVER command.
Introduced in: -

enable_auto_tablet_distribution

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to automatically set the number of buckets.
- If this parameter is set to TRUE, you don't need to specify the number of buckets when you create a table or add a partition. StarRocks automatically determines the number of buckets.
- If this parameter is set to FALSE, you need to manually specify the number of buckets when you create a table or add a partition. If you do not specify the bucket count when adding a new partition to a table, the new partition inherits the bucket count set at the creation of the table. However, you can also manually specify the number of buckets for the new partition.
Introduced in: v2.5.7

enable_experimental_rowstore

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable the hybrid row-column storage.
Introduced in: v3.2.3

storage_usage_soft_limit_percent

Default: 90
Alias: storage_high_watermark_usage_percent
Type: Int
Unit: -
Is mutable: Yes
Description: Soft limit of the storage usage percentage in a BE directory. If the storage usage (in percentage) of the BE storage directory exceeds this value and the remaining storage space is less than storage_usage_soft_limit_reserve_bytes, tablets cannot be cloned into this directory.
Introduced in: -

storage_usage_soft_limit_reserve_bytes

Default: 200 * 1024 * 1024 * 1024
Alias: storage_min_left_capacity_bytes
Type: Long
Unit: Bytes
Is mutable: Yes
Description: Soft limit of the remaining storage space in a BE directory. If the remaining storage space in the BE storage directory is less than this value and the storage usage (in percentage) exceeds storage_usage_soft_limit_percent, tablets cannot be cloned into this directory.
Introduced in: -

storage_usage_hard_limit_percent

Default: 95
Alias: storage_flood_stage_usage_percent
Type: Int
Unit: -
Is mutable: Yes
Description: Hard limit of the storage usage percentage in a BE directory. If the storage usage (in percentage) of the BE storage directory exceeds this value and the remaining storage space is less than storage_usage_hard_limit_reserve_bytes, Load and Restore jobs are rejected. You need to set this item together with the BE configuration item storage_flood_stage_usage_percent to allow the configurations to take effect.
Introduced in: -

storage_usage_hard_limit_reserve_bytes

Default: 100 * 1024 * 1024 * 1024
Alias: storage_flood_stage_left_capacity_bytes
Type: Long
Unit: Bytes
Is mutable: Yes
Description: Hard limit of the remaining storage space in a BE directory. If the remaining storage space in the BE storage directory is less than this value and the storage usage (in percentage) exceeds storage_usage_hard_limit_percent, Load and Restore jobs are rejected. You need to set this item together with the BE configuration item storage_flood_stage_left_capacity_bytes to allow the configurations to take effect.
Introduced in: -

alter_table_timeout_second

Default: 86400
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The timeout duration for the schema change operation (ALTER TABLE).
Introduced in: -

enable_fast_schema_evolution

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable fast schema evolution for all tables within the StarRocks cluster. Valid values are TRUE and FALSE (default). Enabling fast schema evolution can increase the speed of schema changes and reduce resource usage when columns are added or dropped.
Introduced in: v3.2.0

NOTE

StarRocks shared-data clusters do not support this parameter.

If you need to configure the fast schema evolution for a specific table, such as disabling fast schema evolution for a specific table, you can set the table property fast_schema_evolution at table creation.

recover_with_empty_tablet

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to replace a lost or corrupted tablet replica with an empty one. If a tablet replica is lost or corrupted, data queries on this tablet or other healthy tablets may fail. Replacing the lost or corrupted tablet replica with an empty tablet ensures that the query can still be executed. However, the result may be incorrect because data is lost. The default value is FALSE, which means lost or corrupted tablet replicas are not replaced with empty ones, and the query fails.
Introduced in: -

tablet_create_timeout_second

Default: 10
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The timeout duration for creating a tablet. The default value is changed from 1 to 10 from v3.1 onwards.
Introduced in: -

tablet_delete_timeout_second

Default: 2
Type: Int
Unit: Seconds
Is mutable: Yes
Description: The timeout duration for deleting a tablet.
Introduced in: -

check_consistency_default_timeout_second

Default: 600
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The timeout duration for a replica consistency check. You can set this parameter based on the size of your tablet.
Introduced in: -

tablet_sched_slot_num_per_path

Default: 8
Alias: schedule_slot_num_per_path
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of tablet-related tasks that can run concurrently in a BE storage directory. From v2.5 onwards, the default value of this parameter is changed from 4 to 8.
Introduced in: -

tablet_sched_max_scheduling_tablets

Default: 10000
Alias: max_scheduling_tablets
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of tablets that can be scheduled at the same time. If the value is exceeded, tablet balancing and repair checks will be skipped.
Introduced in: -

tablet_sched_disable_balance

Default: false
Alias: disable_balance
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to disable tablet balancing. TRUE indicates that tablet balancing is disabled. FALSE indicates that tablet balancing is enabled.
Introduced in: -

tablet_sched_disable_colocate_balance

Default: false
Alias: disable_colocate_balance
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to disable replica balancing for Colocate Table. TRUE indicates replica balancing is disabled. FALSE indicates replica balancing is enabled.
Introduced in: -

tablet_sched_be_down_tolerate_time_s

Default: 900
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The maximum duration the scheduler allows for a BE node to remain inactive. After the time threshold is reached, tablets on that BE node will be migrated to other active BE nodes.
Introduced in: v2.5.7

tablet_sched_max_balancing_tablets

Default: 500
Alias: max_balancing_tablets
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of tablets that can be balanced at the same time. If this value is exceeded, tablet re-balancing will be skipped.
Introduced in: -

tablet_sched_storage_cooldown_second

Default: -1
Alias: storage_cooldown_second
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The latency of automatic cooling starting from the time of table creation. The default value -1 specifies that automatic cooling is disabled. If you want to enable automatic cooling, set this parameter to a value greater than -1.
Introduced in: -

tablet_sched_max_not_being_scheduled_interval_ms

Default: 15 * 60 * 1000
Type: Long
Unit: Milliseconds
Is mutable: Yes
Description: When the tablet clone tasks are being scheduled, if a tablet has not been scheduled for the specified time in this parameter, StarRocks gives it a higher priority to schedule it as soon as possible.
Introduced in: -

tablet_sched_balance_load_score_threshold

Default: 0.1
Alias: balance_load_score_threshold
Type: Double
Unit: -
Is mutable: Yes
Description: The percentage threshold for determining whether the load of a BE is balanced. If a BE has a lower load than the average load of all BEs and the difference is greater than this value, this BE is in a low load state. On the contrary, if a BE has a higher load than the average load and the difference is greater than this value, this BE is in a high load state.
Introduced in: -

tablet_sched_num_based_balance_threshold_ratio

Default: 0.5
Alias: -
Type: Double
Unit: -
Is mutable: Yes
Description: Doing num based balance may break the disk size balance, but the maximum gap between disks cannot exceed tablet_sched_num_based_balance_threshold_ratio * tablet_sched_balance_load_score_threshold. If there are tablets in the cluster that are constantly balancing from A to B and B to A, reduce this value. If you want the tablet distribution to be more balanced, increase this value.
Introduced in: - 3.1

tablet_sched_balance_load_disk_safe_threshold

Default: 0.5
Alias: balance_load_disk_safe_threshold
Type: Double
Unit: -
Is mutable: Yes
Description: The percentage threshold for determining whether the disk usage of BEs is balanced. If the disk usage of all BEs is lower than this value, it is considered balanced. If the disk usage is greater than this value and the difference between the highest and lowest BE disk usage is greater than 10%, the disk usage is considered unbalanced and a tablet re-balancing is triggered.
Introduced in: -

tablet_sched_repair_delay_factor_second

Default: 60
Alias: tablet_repair_delay_factor_second
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The interval at which replicas are repaired, in seconds.
Introduced in: -

tablet_sched_min_clone_task_timeout_sec

Default: 3 * 60
Alias: min_clone_task_timeout_sec
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The minimum timeout duration for cloning a tablet.
Introduced in: -

tablet_sched_max_clone_task_timeout_sec

Default: 2 * 60 * 60
Alias: max_clone_task_timeout_sec
Type: Long
Unit: Seconds
Is mutable: Yes
Description:The maximum timeout duration for cloning a tablet.
Introduced in: -

tablet_stat_update_interval_second

Default: 300
Type: Int
Unit: Seconds
Is mutable: No
Description: The time interval at which the FE retrieves tablet statistics from each BE.
Introduced in: -

Shared-data

run_mode

Default: shared_nothing
Type: String
Unit: -
Is mutable: No
Description: The running mode of the StarRocks cluster. Valid values: shared_data and shared_nothing (Default).
- shared_data indicates running StarRocks in shared-data mode.
- shared_nothing indicates running StarRocks in shared-nothing mode.
CAUTION
- You cannot adopt the shared_data and shared_nothing modes simultaneously for a StarRocks cluster. Mixed deployment is not supported.
- DO NOT change run_mode after the cluster is deployed. Otherwise, the cluster fails to restart. The transformation from a shared-nothing cluster to a shared-data cluster or vice versa is not supported.
Introduced in: -

cloud_native_meta_port

Default: 6090
Type: Int
Unit: -
Is mutable: No
Description: FE cloud-native metadata server RPC listen port.
Introduced in: -

cloud_native_storage_type

Default: S3
Type: String
Unit: -
Is mutable: No
Description: The type of object storage you use. In shared-data mode, StarRocks supports storing data in Azure Blob (supported from v3.1.1 onwards), and object storages that are compatible with the S3 protocol (such as AWS S3, Google GCP, and MinIO). Valid value: S3 (Default) and AZBLOB. If you specify this parameter as S3, you must add the parameters prefixed by aws_s3. If you specify this parameter as AZBLOB, you must add the parameters prefixed by azure_blob.
Introduced in: -

aws_s3_path

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The S3 path used to store data. It consists of the name of your S3 bucket and the sub-path (if any) under it, for example, testbucket/subpath.
Introduced in: v3.0

aws_s3_region

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The region in which your S3 bucket resides, for example, us-west-2.
Introduced in: v3.0

aws_s3_endpoint

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The endpoint used to access your S3 bucket, for example, https://s3.us-west-2.amazonaws.com.
Introduced in: v3.0

aws_s3_use_aws_sdk_default_behavior

Default: false
Type: Boolean
Unit: -
Is mutable: No
Description: Whether to use the default authentication credential of AWS SDK. Valid values: true and false (Default).
Introduced in: v3.0

aws_s3_use_instance_profile

Default: false
Type: Boolean
Unit: -
Is mutable: No
Description: Whether to use Instance Profile and Assumed Role as credential methods for accessing S3. Valid values: true and false (Default).
- If you use IAM user-based credential (Access Key and Secret Key) to access S3, you must specify this item as false, and specify aws_s3_access_key and aws_s3_secret_key.
- If you use Instance Profile to access S3, you must specify this item as true.
- If you use Assumed Role to access S3, you must specify this item as true, and specify aws_s3_iam_role_arn.
- And if you use an external AWS account, you must also specify aws_s3_external_id.
Introduced in: v3.0

aws_s3_access_key

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The Access Key ID used to access your S3 bucket.
Introduced in: v3.0

aws_s3_secret_key

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The Secret Access Key used to access your S3 bucket.
Introduced in: v3.0

aws_s3_iam_role_arn

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The ARN of the IAM role that has privileges on your S3 bucket in which your data files are stored.
Introduced in: v3.0

aws_s3_external_id

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The external ID of the AWS account that is used for cross-account access to your S3 bucket.
Introduced in: v3.0

azure_blob_endpoint

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The endpoint of your Azure Blob Storage Account, for example, https://test.blob.core.windows.net.
Introduced in: v3.1

azure_blob_path

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The Azure Blob Storage path used to store data. It consists of the name of the container within your storage account and the sub-path (if any) under the container, for example, testcontainer/subpath.
Introduced in: v3.1

azure_blob_shared_key

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The Shared Key used to authorize requests for your Azure Blob Storage.
Introduced in: v3.1

azure_blob_sas_token

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The shared access signatures (SAS) used to authorize requests for your Azure Blob Storage.
Introduced in: v3.1

lake_compaction_score_selector_min_score

Default: 10.0
Type: Double
Unit: -
Is mutable: Yes
Description: The Compaction Score threshold that triggers Compaction operations in a shared-data cluster. When the Compaction Score of a partition is greater than or equal to this value, the system performs Compaction on that partition.
Introduced in: v3.1.0

lake_compaction_max_tasks

Default: -1
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of concurrent Compaction tasks allowed in a shared-data cluster. Setting this item to -1 indicates to calculate the concurrent task number in an adaptive manner. Setting this value to 0 will disable compaction.
Introduced in: v3.1.0

lake_compaction_history_size

Default: 20
Type: Int
Unit: -
Is mutable: Yes
Description: The number of recent successful Compaction task records to keep in the memory of the Leader FE node in a shared-data cluster. You can view recent successful Compaction task records using the SHOW PROC '/compactions' command. Note that the Compaction history is stored in the FE process memory, and it will be lost if the FE process is restarted.
Introduced in: v3.1.0

lake_publish_version_max_threads

Default: 512
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of threads for Version Publish tasks in a shared-data cluster.
Introduced in: v3.2.0

lake_autovacuum_parallel_partitions

Default: 8
Type: Int
Unit: -
Is mutable: No
Description: The maximum number of partitions that can undergo AutoVacuum simultaneously in a shared-data cluster. AutoVacuum is the Garbage Collection after Compactions.
Introduced in: v3.1.0

lake_autovacuum_partition_naptime_seconds

Default: 180
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The minimum interval between AutoVacuum operations on the same partition in a shared-data cluster.
Introduced in: v3.1.0

lake_autovacuum_grace_period_minutes

Default: 30
Type: Long
Unit: Minutes
Is mutable: Yes
Description: The time range for retaining historical data versions in a shared-data cluster. Historical data versions within this time range are not automatically cleaned via AutoVacuum after Compactions. You need to set this value greater than the maximum query time to avoid that the data accessed by running queries get deleted before the queries finish. The default value has been changed from 5 to 30 since v3.3.0, v3.2.5, and v3.1.10.
Introduced in: v3.1.0

lake_autovacuum_stale_partition_threshold

Default: 12
Type: Long
Unit: Hours
Is mutable: Yes
Description: If a partition has no updates (loading, DELETE, or Compactions) within this time range, the system will not perform AutoVacuum on this partition.
Introduced in: v3.1.0

lake_enable_ingest_slowdown

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable Data Ingestion Slowdown in a shared-data cluster. When Data Ingestion Slowdown is enabled, if the Compaction Score of a partition exceeds lake_ingest_slowdown_threshold, loading tasks on that partition will be throttled down. This configuration only takes effect when run_mode is set to shared_data.
Introduced in: v3.2.0

lake_ingest_slowdown_threshold

Default: 100
Type: Long
Unit: -
Is mutable: Yes
Description: The Compaction Score threshold that triggers Data Ingestion Slowdown in a shared-data cluster. This configuration only takes effect when lake_enable_ingest_slowdown is set to true.
Introduced in: v3.2.0

lake_ingest_slowdown_ratio

Default: 0.1
Type: Double
Unit: -
Is mutable: Yes
Description: The ratio of the loading rate slowdown when Data Ingestion Slowdown is triggered.

Data loading tasks consist of two phases: data writing and data committing (COMMIT). Data Ingestion Slowdown is achieved by delaying data committing. The delay ratio is calculated using the following formula: (compaction_score - lake_ingest_slowdown_threshold) * lake_ingest_slowdown_ratio. For example, if the data writing phase takes 5 minutes, lake_ingest_slowdown_ratio is 0.1, and the Compaction Score is 10 higher than lake_ingest_slowdown_threshold, the delay in data committing time is 5 * 10 * 0.1 = 5 minutes, which means the average loading speed is halved.
Introduced in: v3.2.0

NOTE

If a loading task writes to multiple partitions simultaneously, the maximum Compaction Score among all partitions is used to calculate the delay in committing time.

The delay in committing time is calculated during the first attempt to commit. Once set, it will not change. Once the delay time is up, as long as the Compaction Score is not above lake_compaction_score_upper_bound, the system will perform the data committing operation.

If the delay in committing time exceeds the timeout of the loading task, the task will fail directly.

lake_compaction_score_upper_bound

Default: 0
Type: Long
Unit: -
Is mutable: Yes
Description: The upper limit of the Compaction Score for a partition in a shared-data cluster. 0 indicates no upper limit. This item only takes effect when lake_enable_ingest_slowdown is set to true. When the Compaction Score of a partition reaches or exceeds this upper limit, all loading tasks on that partition will be indefinitely delayed until the Compaction Score drops below this value or the task times out.
Introduced in: v3.2.0

lake_compaction_disable_tables

Default: ""
Type: String
Unit: -
Is mutable: Yes
Description: The table list of which compaction is disabled in shared-data mode. The format is tableId1;tableId2, seperated by semicolon, for example, 12345;98765.
Introduced in: v3.1.11

Other

tmp_dir

Default: StarRocksFE.STARROCKS_HOME_DIR + "/temp_dir"
Type: String
Unit: -
Is mutable: No
Description: The directory that stores temporary files such as files generated during backup and restore procedures. After these procedures finish, the generated temporary files are deleted.
Introduced in: -

plugin_dir

Default: System.getenv("STARROCKS_HOME") + "/plugins"
Type: String
Unit: -
Is mutable: No
Description: The directory that stores plugin installation packages.
Introduced in: -

plugin_enable

Default: true
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether plugins can be installed on FEs. Plugins can be installed or uninstalled only on the Leader FE.
Introduced in: -

max_agent_task_threads_num

Default: 4096
Type: Int
Unit: -
Is mutable: No
Description: The maximum number of threads that are allowed in the agent task thread pool.
Introduced in: -

agent_task_resend_wait_time_ms

Default: 5000
Type: Long
Unit: Milliseconds
Is mutable: Yes
Description: The duration the FE must wait before it can resend an agent task. An agent task can be resent only when the gap between the task creation time and the current time exceeds the value of this parameter. This parameter is used to prevent repetitive sending of agent tasks.
Introduced in: -

backup_job_default_timeout_ms

Default: 86400 * 1000
Type: Int
Unit: Milliseconds
Is mutable: Yes
Description: The timeout duration of a backup job. If this value is exceeded, the backup job fails.
Introduced in: -

locale

Default: zh_CN.UTF-8
Type: String
Unit: -
Is mutable: No
Description: The character set that is used by the FE.
Introduced in: -

report_queue_size (Deprecated)

Default: 100
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of jobs that can wait in a report queue. The report is about disk, task, and tablet information of BEs. If too many report jobs are piling up in a queue, OOM will occur.
Introduced in: -

enable_metric_calculator

Default: true
Type: Boolean
Unit: -
Is mutable: No
Description: Specifies whether to enable the feature that is used to periodically collect metrics. Valid values: TRUE and FALSE. TRUE specifies to enable this feature, and FALSE specifies to disable this feature.
Introduced in: -

max_small_file_number

Default: 100
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum number of small files that can be stored on an FE directory.
Introduced in: -

max_small_file_size_bytes

Default: 1024 * 1024
Type: Int
Unit: Bytes
Is mutable: Yes
Description: The maximum size of a small file.
Introduced in: -

small_file_dir

Default: StarRocksFE.STARROCKS_HOME_DIR + "/small_files"
Type: String
Unit: -
Is mutable: No
Description: The root directory of small files.
Introduced in: -

enable_auth_check

Default: true
Type: Boolean
Unit: -
Is mutable: No
Description: Specifies whether to enable the authentication check feature. Valid values: TRUE and FALSE. TRUE specifies to enable this feature, and FALSE specifies to disable this feature.
Introduced in: -

authentication_ldap_simple_server_host

Default: Empty string
Type: String
Unit: -
Is mutable: Yes
Description: The host on which the LDAP server runs.
Introduced in: -

authentication_ldap_simple_server_port

Default: 389
Type: Int
Unit: -
Is mutable: Yes
Description: The port of the LDAP server.
Introduced in: -

authentication_ldap_simple_bind_base_dn

Default: Empty string
Type: String
Unit: -
Is mutable: Yes
Description: The base DN, which is the point from which the LDAP server starts to search for users' authentication information.
Introduced in: -

authentication_ldap_simple_user_search_attr

Default: uid
Type: String
Unit: -
Is mutable: Yes
Description: The name of the attribute that identifies users in LDAP objects.
Introduced in: -

authentication_ldap_simple_bind_root_dn

Default: Empty string
Type: String
Unit: -
Is mutable: Yes
Description: The administrator DN used to search for users' authentication information.
Introduced in: -

authentication_ldap_simple_bind_root_pwd

Default: Empty string
Type: String
Unit: -
Is mutable: Yes
Description: The password of the administrator used to search for users' authentication information.
Introduced in: -

auth_token

Default: Empty string
Type: String
Unit: -
Is mutable: No
Description: The token that is used for identity authentication within the StarRocks cluster to which the FE belongs. If this parameter is left unspecified, StarRocks generates a random token for the cluster at the time when the leader FE of the cluster is started for the first time.
Introduced in: -

hive_meta_load_concurrency

Default: 4
Type: Int
Unit: -
Is mutable: No
Description: The maximum number of concurrent threads that are supported for Hive metadata.
Introduced in: -

hive_meta_cache_refresh_interval_s

Default: 3600 * 2
Type: Long
Unit: Seconds
Is mutable: No
Description: The time interval at which the cached metadata of Hive external tables is updated.
Introduced in: -

hive_meta_cache_ttl_s

Default: 3600 * 24
Type: Long
Unit: Seconds
Is mutable: No
Description: The amount of time after which the cached metadata of Hive external tables expires.
Introduced in: -

hive_meta_store_timeout_s

Default: 10
Type: Long
Unit: Seconds
Is mutable: No
Description: The amount of time after which a connection to a Hive metastore times out.
Introduced in: -

es_state_sync_interval_second

Default: 10
Type: Long
Unit: Seconds
Is mutable: No
Description: The time interval at which the FE obtains Elasticsearch indexes and synchronizes the metadata of StarRocks external tables.
Introduced in: -

max_upload_task_per_be

Default: 0
Type: Int
Unit: -
Is mutable: Yes
Description: In each BACKUP operation, the maximum number of upload tasks StarRocks assigned to a BE node. When this item is set to less than or equal to 0, no limit is imposed on the task number.
Introduced in: v3.1.0

max_download_task_per_be

Default: 0
Type: Int
Unit: -
Is mutable: Yes
Description: In each RESTORE operation, the maximum number of download tasks StarRocks assigned to a BE node. When this item is set to less than or equal to 0, no limit is imposed on the task number.
Introduced in: v3.1.0

enable_colocate_restore

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to enable Backup and Restore for Colocate Tables. true indicates enabling Backup and Restore for Colocate Tables and false indicates disabling it.
Introduced in: v3.2.10, v3.3.3

allow_system_reserved_names

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: Whether to allow users to create columns whose names are initiated with __op and __row. To enable this feature, set this parameter to TRUE. Please note that these name formats are reserved for special purposes in StarRocks and creating such columns may result in undefined behavior. Therefore this feature is disabled by default.
Introduced in: v3.2.0

jdbc_meta_default_cache_enable

Default: false
Type: Boolean
Unit: -
Is mutable: Yes
Description: The default value for whether the JDBC Catalog metadata cache is enabled. When set to True, newly created JDBC Catalogs will default to metadata caching enabled.
Introduced in: -

jdbc_meta_default_cache_expire_sec

Default: 600
Type: Long
Unit: Seconds
Is mutable: Yes
Description: The default expiration time for the JDBC Catalog metadata cache. When jdbc_meta_default_cache_enable is set to true, newly created JDBC Catalogs will default to setting the expiration time of the metadata cache.
Introduced in: -

jdbc_connection_pool_size

Default: 8
Type: Int
Unit: -
Is mutable: Yes
Description: The maximum capacity of the JDBC connection pool for accessing JDBC catalogs.
Introduced in: -

jdbc_minimum_idle_connections

Default: 1
Type: Int
Unit: -
Is mutable: Yes
Description: The minimum number of idle connections in the JDBC connection pool for accessing JDBC catalogs.
Introduced in: -

jdbc_connection_idle_timeout_ms

Default: 600000
Type: Int
Unit: Milliseconds
Is mutable: Yes
Description: The maximum amount of time after which a connection for accessing a JDBC catalog times out. Timed-out connections are considered idle.
Introduced in: -

query_detail_explain_level

Default: COSTS
Type: String
Unit: -
Is mutable: true
Description: The detail level of query plan returned by the EXPLAIN statement. Valid values: COSTS, NORMAL, VERBOSE.
Introduced in: v3.2.12, v3.3.5

FE Configuration

View FE configuration items​

Configure FE parameters​

Configure FE dynamic parameters​

Configure FE static parameters​

Understand FE parameters​

Logging​

log_roll_size_mb​

sys_log_dir​

sys_log_level​

sys_log_roll_num​

sys_log_verbose_modules​

sys_log_roll_interval​

sys_log_delete_age​

audit_log_dir​

audit_log_roll_num​

audit_log_modules​

qe_slow_log_ms​

audit_log_roll_interval​

audit_log_delete_age​

dump_log_dir​

dump_log_roll_num​

dump_log_modules​

dump_log_roll_interval​

dump_log_delete_age​

Server​

frontend_address​

priority_networks​

http_port​

http_worker_threads_num​

http_backlog_num​

cluster_name​

rpc_port​

thrift_server_max_worker_threads​

thrift_server_queue_size​

thrift_client_timeout_ms​

thrift_backlog_num​

brpc_idle_wait_max_time​

query_port​

mysql_nio_backlog_num​

mysql_service_nio_enabled​

mysql_service_io_threads_num​

max_mysql_service_task_threads_num​

mysql_server_version​

qe_max_connection​

max_connection_scheduler_threads_num​

Metadata and cluster management​

cluster_id​

meta_dir​

edit_log_type​

edit_log_port​

edit_log_roll_num​

ignore_unknown_log_id​

meta_delay_toleration_second​

master_sync_policy​

replica_sync_policy​

replica_ack_policy​

bdbje_heartbeat_timeout_second​

bdbje_replica_ack_timeout_second​

bdbje_lock_timeout_second​

bdbje_reset_election_group​

max_bdbje_clock_delta_ms​

txn_rollback_limit​

heartbeat_mgr_threads_num​

heartbeat_mgr_blocking_queue_size​

catalog_try_lock_timeout_ms​

ignore_materialized_view_error​

ignore_meta_check​

drop_backend_after_decommission​

enable_collect_query_detail_info​

enable_background_refresh_connector_metadata​

background_refresh_metadata_interval_millis​

background_refresh_metadata_time_secs_since_last_access_secs​

enable_statistics_collect_profile​

metadata_enable_recovery_mode​

enable_legacy_compatibility_for_replication​

User, role, and privilege​

privilege_max_total_roles_per_user​

privilege_max_role_depth​

Query engine​

View FE configuration items

Configure FE parameters

Configure FE dynamic parameters

Configure FE static parameters

Understand FE parameters

Logging

log_roll_size_mb

sys_log_dir

sys_log_level

sys_log_roll_num

sys_log_verbose_modules

sys_log_roll_interval

sys_log_delete_age

audit_log_dir

audit_log_roll_num

audit_log_modules

qe_slow_log_ms

audit_log_roll_interval

audit_log_delete_age

dump_log_dir

dump_log_roll_num

dump_log_modules

dump_log_roll_interval

dump_log_delete_age

Server

frontend_address

priority_networks

http_port

http_worker_threads_num

http_backlog_num

cluster_name

rpc_port

thrift_server_max_worker_threads

thrift_server_queue_size

thrift_client_timeout_ms

thrift_backlog_num

brpc_idle_wait_max_time

query_port

mysql_nio_backlog_num

mysql_service_nio_enabled

mysql_service_io_threads_num

max_mysql_service_task_threads_num

mysql_server_version

qe_max_connection

max_connection_scheduler_threads_num

Metadata and cluster management

cluster_id

meta_dir

edit_log_type

edit_log_port

edit_log_roll_num

ignore_unknown_log_id

meta_delay_toleration_second

master_sync_policy

replica_sync_policy

replica_ack_policy

bdbje_heartbeat_timeout_second

bdbje_replica_ack_timeout_second

bdbje_lock_timeout_second

bdbje_reset_election_group

max_bdbje_clock_delta_ms

txn_rollback_limit

heartbeat_mgr_threads_num

heartbeat_mgr_blocking_queue_size

catalog_try_lock_timeout_ms

ignore_materialized_view_error

ignore_meta_check

drop_backend_after_decommission

enable_collect_query_detail_info

enable_background_refresh_connector_metadata

background_refresh_metadata_interval_millis

background_refresh_metadata_time_secs_since_last_access_secs

enable_statistics_collect_profile

metadata_enable_recovery_mode

enable_legacy_compatibility_for_replication

User, role, and privilege

privilege_max_total_roles_per_user

privilege_max_role_depth

Query engine

publish_version_interval_ms