centos7 - 定時清空緩存

情況緩存

[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系統buff/cache 中緩存數據佔用內存過高，定時清理buff/cache ，釋放系統內存

echo 1 > /proc/sys/vm/drop_caches

echo 1 > /proc/sys/vm/drop_caches

echo 1 > /proc/sys/vm/drop_caches

定時任務