diff --git a/system-variables.md b/system-variables.md index 9b1717a6cd5af..cf05f2082609d 100644 --- a/system-variables.md +++ b/system-variables.md @@ -1566,10 +1566,6 @@ mysql> SELECT job_info FROM mysql.analyze_jobs ORDER BY end_time DESC LIMIT 1; ### tidb_enable_dist_task New in v7.1.0 -> **Warning:** -> -> This feature is still in the experimental stage. It is not recommended to enable this feature in production environments. - - Scope: GLOBAL - Persists to cluster: Yes - Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): No @@ -3661,7 +3657,7 @@ For a system upgraded to v5.0 from an earlier version, if you have not modified - Persists to cluster: Yes - Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): No - Type: Boolean -- Default value: `ON`. When you upgrade TiDB from a version earlier than v7.5.0 to v7.5.0 or a later version, the default value is `OFF`. +- Default value: `ON`. When you upgrade TiDB from a version earlier than v7.5.0 to v7.5.0 or a later version, the default value is `OFF`. - This variable is used for TiDB to merge global statistics asynchronously to avoid OOM issues. ### tidb_metric_query_range_duration New in v4.0 @@ -4790,7 +4786,7 @@ SHOW WARNINGS; - Range: `[2, 255]` - This variable limits how many historical schema versions can be cached in a TiDB instance. The default value is `16`, which means that TiDB caches 16 historical schema versions by default. - Generally, you do not need to modify this variable. When the [Stale Read](/stale-read.md) feature is used and DDL operations are executed very frequently, it will cause the schema version to change very frequently. Consequently, when Stale Read tries to obtain schema information from a snapshot, it might take a lot of time to rebuild the information due to schema cache misses. In this case, you can increase the value of `tidb_schema_version_cache_limit` (for example, `32`) to avoid the problem of schema cache misses. -- Modifying this variable causes the memory usage of TiDB to increase slightly. Monitor the memory usage of TiDB to avoid OOM problems. +- Modifying this variable causes the memory usage of TiDB to increase slightly. Monitor the memory usage of TiDB to avoid OOM problems. ### tidb_server_memory_limit New in v6.4.0 diff --git a/tidb-distributed-execution-framework.md b/tidb-distributed-execution-framework.md index 469cd7d6ab555..a2120cc0670be 100644 --- a/tidb-distributed-execution-framework.md +++ b/tidb-distributed-execution-framework.md @@ -5,10 +5,6 @@ summary: Learn the use cases, limitations, usage, and implementation principles # TiDB Backend Task Distributed Execution Framework -> **Warning:** -> -> This feature is an experimental feature. It is not recommended to use it in production environments. - > **Note:**