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 compaction filter doc (#16194) #16866

Merged
merged 6 commits into from
Mar 21, 2024
Merged

update compaction filter doc (#16194) #16866

Changes from all commits
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
7a70ecd
update compaction filter
tonyxuqqi Jan 16, 2024
4769d5b
polish
tonyxuqqi Jan 16, 2024
e5dc525
polish
tonyxuqqi Jan 16, 2024
1f18533
Update garbage-collection-configuration.md
tonyxuqqi Mar 21, 2024
b97d524
make ci happy
Oreoxmt Mar 21, 2024
1beb30d
make ci happy
Oreoxmt Mar 21, 2024
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
7 changes: 7 additions & 0 deletions garbage-collection-configuration.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -84,3 +84,10 @@ show config where type = 'tikv' and name like '%enable-compaction-filter%';
| tikv | 172.16.5.35:20163 | gc.enable-compaction-filter | true |
+------+-------------------+-----------------------------+-------+
```

> **注意：**
>
> 在使用 Compaction Filter 机制时，可能会出现 GC 进度延迟的情况，从而影响 TiKV 扫描性能。当你的负载中含有大量 coprocessor 请求，并且在 [**TiKV-Details > Coprocessor Detail**](/grafana-tikv-dashboard.md#coprocessor-detail) 面板中发现 Total Ops Details 的 `next()` 或 `prev()` 调用次数远远超过 `processed_keys` 调用的三倍时，可以采取以下措施：
>
> - 对于 TiDB v7.1.3 之前版本，建议尝试关闭 Compaction Filter，以加快 GC 速度。
> - 从 v7.1.3 开始，TiDB 会根据每个 Region 的冗余版本数量 [`region-compact-min-redundant-rows`](/tikv-configuration-file.md#region-compact-min-redundant-rows-从-v710-版本开始引入) 和比例 [`region-compact-redundant-rows-percent`](/tikv-configuration-file.md#region-compact-redundant-rows-percent-从-v710-版本开始引入) 自动触发 compaction，从而提高 Compaction Filter 的 GC 速度。因此，在 v7.1.3 及之后的版本中，如果遇到上述情况，建议调整这两个参数，无需关闭 Compaction Filter。
Loading