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tidb: remove experimental warnings for stats lock (#16593) #16603

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Feb 26, 2024
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tidb: remove experimental warnings for stats lock (#16593) #16603

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fd25239
tidb: remove experimental warnings for stats lock
Oreoxmt Feb 23, 2024
9ee9429
update release notes
Oreoxmt Feb 26, 2024
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2 changes: 1 addition & 1 deletion basic-features.md
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Expand Up @@ -179,7 +179,7 @@ You can try out TiDB features on [TiDB Playground](https://play.tidbcloud.com/?u
| [Collect statistics for `PREDICATE COLUMNS`](/statistics.md#collect-statistics-on-some-columns) | E | E | E | E | E | E | E | N | N | N | N |
| [Control the memory quota for collecting statistics](/statistics.md#the-memory-quota-for-collecting-statistics) | E | E | E | E | E | N | N | N | N | N | N |
| [Randomly sample about 10000 rows of data to quickly build statistics](/system-variables.md#tidb_enable_fast_analyze) | Deprecated | Deprecated | E | E | E | E | E | E | E | E | E |
| [Lock statistics](/statistics.md#lock-statistics) | E | E | E | E | N | N | N | N | N | N | N |
| [Lock statistics](/statistics.md#lock-statistics) | Y | Y | E | E | N | N | N | N | N | N | N |
| [Lightweight statistics initialization](/statistics.md#load-statistics) | Y | Y | E | N | N | N | N | N | N | N | N |
| [Show the progress of collecting statistics](/sql-statements/sql-statement-show-analyze-status.md) | Y | Y | N | N | N | N | N | N | N | N | N |

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4 changes: 2 additions & 2 deletions releases/release-7.4.0.md
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Expand Up @@ -185,9 +185,9 @@ Quick access: [Quick start](https://docs.pingcap.com/tidb/v7.4/quick-start-with-

For more information, see [documentation](/tidb-resource-control.md#manage-background-tasks).

* Enhance the ability to lock statistics [#46351](https://github.com/pingcap/tidb/issues/46351) @[hi-rustin](https://github.com/hi-rustin)
* Lock statistics becomes generally available (GA) [#46351](https://github.com/pingcap/tidb/issues/46351) @[hi-rustin](https://github.com/hi-rustin)

In v7.4.0, TiDB has enhanced the ability to [lock statistics](/statistics.md#lock-statistics). Now, to ensure operational security, locking and unlocking statistics require the same privileges as collecting statistics. In addition, TiDB supports locking and unlocking statistics for specific partitions, providing greater flexibility. If you are confident in queries and execution plans in the database and want to prevent any changes from occurring, you can lock statistics to enhance stability.
In v7.4.0, [lock statistics](/statistics.md#lock-statistics) becomes generally available. Now, to ensure operational security, locking and unlocking statistics require the same privileges as collecting statistics. In addition, TiDB supports locking and unlocking statistics for specific partitions, providing greater flexibility. If you are confident in queries and execution plans in the database and want to prevent any changes from occurring, you can lock statistics to enhance stability.

For more information, see [documentation](/statistics.md#lock-statistics).

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4 changes: 0 additions & 4 deletions sql-statements/sql-statement-lock-stats.md
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Expand Up @@ -7,10 +7,6 @@ summary: An overview of the usage of LOCK STATS for the TiDB database.

`LOCK STATS` is used to lock the statistics of tables or partitions. When the statistics is locked, TiDB does not automatically update the statistics of the table or partition. For details on the behavior, see [Behaviors of locking statistics](/statistics.md#behaviors-of-locking-statistics).

> **Warning:**
>
> Locking statistics is an experimental feature for the current version. It is not recommended to use it in the production environment.

## Synopsis

```ebnf+diagram
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4 changes: 0 additions & 4 deletions sql-statements/sql-statement-show-stats-locked.md
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Expand Up @@ -7,10 +7,6 @@ summary: An overview of the usage of SHOW STATS_LOCKED for the TiDB database.

`SHOW STATS_LOCKED` shows the tables whose statistics are locked.

> **Warning:**
>
> Locking statistics is an experimental feature for the current version. It is not recommended to use it in the production environment.

## Synopsis

```ebnf+diagram
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4 changes: 0 additions & 4 deletions sql-statements/sql-statement-unlock-stats.md
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Expand Up @@ -7,10 +7,6 @@ summary: An overview of the usage of UNLOCK STATS for the TiDB database.

`UNLOCK STATS` is used to unlock the statistics of a table or tables.

> **Warning:**
>
> Locking statistics is an experimental feature for the current version. It is not recommended to use it in the production environment.

## Synopsis

```ebnf+diagram
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4 changes: 0 additions & 4 deletions statistics.md
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Expand Up @@ -806,10 +806,6 @@ LOAD STATS 'file_name'

## Lock statistics

> **Warning:**
>
> Locking statistics is an experimental feature for the current version. It is not recommended to use it in the production environment.

Starting from v6.5.0, TiDB supports locking statistics. After the statistics of a table or a partition are locked, the statistics of the table cannot be modified and the `ANALYZE` statement cannot be executed on the table. For example:

Create table `t`, and insert data into it. When the statistics of table `t` are not locked, the `ANALYZE` statement can be successfully executed.
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