BiteTheDDDDt commented on a change in pull request #6323:
URL: https://github.com/apache/incubator-doris/pull/6323#discussion_r676265235
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File path: docs/zh-CN/sql-reference/sql-statements/Administration/CLEAN TRASH.md
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@@ -0,0 +1,47 @@
+---
+{
+ "title": "CLEAN TRASH",
+ "language": "zh-CN"
+}
+---
+
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+-->
+
+# CLEAN TRASH
+## description
+ 该语句用于清理 backend 内的垃圾数据。
Review comment:
>
>
> Will this statement clean up both trash and snapshot?
> Will cleaning up the snapshot involve the snapshot being restored?
Yes, this statement will clean up both trash and snapshot.
This statement will call `StorageEngine::start_trash_sweep`.
It will only clean up expired data (define at
`config::snapshot_expire_time_sec`/`config::trash_file_expire_time_sec`).
And this function will be automatically called periodically, so I think its
cleanup is harmless.
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