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Update description for analyze version #7890

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Update description for analyze version #7890

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2 changes: 1 addition & 1 deletion statistics.md
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Expand Up @@ -6,7 +6,7 @@ aliases: ['/docs/dev/statistics/','/docs/dev/reference/performance/statistics/']

# Introduction to Statistics

TiDB uses statistics to decide [which index to choose](/choose-index.md). The `tidb_analyze_version` variable controls the statistics collected by TiDB. Currently, two versions of statistics are supported: `tidb_analyze_version = 1` and `tidb_analyze_version = 2`. In versions before v5.1.0, the default value of this variable is `1`. In v5.1, v5.2, and v5.3, the default value of this variable is `2`, which serves as an experimental feature.
TiDB uses statistics to decide [which index to choose](/choose-index.md). The `tidb_analyze_version` variable controls the statistics collected by TiDB. Currently, two versions of statistics are supported: `tidb_analyze_version = 1` and `tidb_analyze_version = 2`. In versions before v5.1.0, the default value of this variable is `1`. In v5.3.0 and later versions, the default value of this variable is `2`, which serves as an experimental feature. If your cluster is upgraded from a version earlier than v5.3.0 to v5.3.0 or later, the default value of `tidb_analyze_version` does not change.

> **Note:**
>
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2 changes: 1 addition & 1 deletion system-variables.md
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Expand Up @@ -452,7 +452,7 @@ MPP is a distributed computing framework provided by the TiFlash engine, which a
- Default value: `2`
- Range: `[1, 2]`
- Controls how TiDB collects statistics.
- In versions before v5.1.0, the default value of this variable is `1`. In v5.1.0, the default value of this variable is `2`, which serves as an experimental feature. For detailed introduction, see [Introduction to Statistics](/statistics.md).
- In v5.3.0 and later versions, the default value of this variable is `2`, which serves as an experimental feature. If your cluster is upgraded from a version earlier than v5.3.0 to v5.3.0 or later, the default value of `tidb_analyze_version` does not change. For detailed introduction, see [Introduction to Statistics](/statistics.md).

### tidb_auto_analyze_end_time

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