centos7 - 定时清空缓存

情况缓存

[hadoop@master ~]$ free -h
              total        used        free      shared  buff/cache   available
Mem:            31G         11G         18G         17M        1.4G         19G
Swap:           63G         10M         63G
[hadoop@master ~]$

Linux系统buff/cache 中缓存数据占用内存过高，定时清理buff/cache ，释放系统内存

echo 1 > /proc/sys/vm/drop_caches

echo 1 > /proc/sys/vm/drop_caches

echo 1 > /proc/sys/vm/drop_caches

定时任务