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add doc about system sync file cache.

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freedomDR 2023-01-27 01:14:42 +00:00
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docs/en/sql-reference/statements/system.md
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@ -362,3 +362,15 @@ Allows to drop filesystem cache.
```sql ```sql
SYSTEM DROP FILESYSTEM CACHE SYSTEM DROP FILESYSTEM CACHE
``` ```
### SYNC FILE CACHE
:::note
It's too heavy and has potential for misuse.
:::
Will do sync syscall.
```sql
SYSTEM SYNC FILE CACHE
```