Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Update description for analyze version #8412

Merged
merged 5 commits into from
Mar 3, 2022
Merged

Update description for analyze version #8412

Show file tree
Hide file tree
Changes from 3 commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
4a129b3
Update description for analyze version
TomShawn Feb 17, 2022
6089601
Update statistics.md
TomShawn Feb 18, 2022
336fa08
Update statistics.md
TomShawn Mar 3, 2022
a1c279e
Apply suggestions from code review
TomShawn Mar 3, 2022
7a8ea0d
Merge remote-tracking branch 'upstream/master' into update-descriptio…
TomShawn Mar 3, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion statistics.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ aliases: ['/docs-cn/dev/statistics/','/docs-cn/dev/reference/performance/statist

# 统计信息简介

TiDB 使用统计信息来决定[索引的选择](/choose-index.md)。变量 `tidb_analyze_version` 用于控制所收集到的统计信息。目前 TiDB 中支持两种统计信息：`tidb_analyze_version = 1` 以及 `tidb_analyze_version = 2`。在 v5.1.0 以前的版本中，该变量的默认值为 `1`。在 v5.1、v5.2、v5.3 中，该变量的默认值为 `2`，作为实验特性启用。
TiDB 使用统计信息来决定[索引的选择](/choose-index.md)。变量 `tidb_analyze_version` 用于控制所收集到的统计信息。目前 TiDB 中支持两种统计信息：`tidb_analyze_version = 1` 以及 `tidb_analyze_version = 2`。在 v5.3 及之后的版本中，该变量的默认值为 `2`，作为实验特性启用。如果从 v5.3 之前版本的集群升级至 v5.3 及之后的版本，`tidb_analyze_version` 的默认值不发生变化。
TomShawn marked this conversation as resolved.
Show resolved Hide resolved

> **注意：**
>
Expand Down
2 changes: 1 addition & 1 deletion system-variables.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -332,7 +332,7 @@ MPP 是 TiFlash 引擎提供的分布式计算框架，允许节点之间的数
- 默认值：`2`
- 范围：`[1, 2]`
- 这个变量用于控制 TiDB 收集统计信息的行为。
- 在 v5.1.0 以前的版本中，该变量的默认值为 `1`。在 v5.1.0 中，该变量的默认值为 `2`，作为实验特性使用，具体可参照[统计信息简介](/statistics.md)文档。
- 在 v5.3 及之后的版本中，该变量的默认值为 `2`，作为实验特性启用，具体可参照[统计信息简介](/statistics.md)文档。
TomShawn marked this conversation as resolved.
Show resolved Hide resolved

### `tidb_auto_analyze_end_time`

Expand Down