Linux 缓存清除定时清除

脚本定时清除Centos7缓存(buffer/cache)

Centos7缓存定时清除

Posted by zhmingyong on August 6, 2023

查看缓存

[root@bogon ~]# free -h
              total        used        free      shared  buff/cache   available
Mem:            62G         26G         18G        2.0G         18G         34G
Swap:           15G         14M         15G

清除缓存脚本

#!/bin/bash
echo "开始清除缓存"
sync;sync;sync; # 将未写入的缓存写入硬盘，防止数据丢失
sleep 60 # 暂停 60秒
echo 1 > /proc/sys/vm/drop_caches
echo 2 > /proc/sys/vm/drop_caches
echo 3 > /proc/sys/vm/drop_caches

授权(增加可执行权限)

chmod +x /opt/cacheClean.sh

创建定时脚本

crontab e 打开定时器编辑

0 2/5 * * * /opt/cacheClean.sh