From 876a92d4d17422ccf6f811a1c053649fa739e486 Mon Sep 17 00:00:00 2001
From: freedomDR <1640145602@qq.com>
Date: Fri, 27 Jan 2023 01:14:42 +0000
Subject: [PATCH] add doc about system sync file cache.

---
 docs/en/sql-reference/statements/system.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/docs/en/sql-reference/statements/system.md b/docs/en/sql-reference/statements/system.md
index 6c62229f0d5..7ac0ce84e5b 100644
--- a/docs/en/sql-reference/statements/system.md
+++ b/docs/en/sql-reference/statements/system.md
@@ -362,3 +362,15 @@ Allows to drop filesystem cache.
 ```sql
 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
+```