oscache遠程服務器特別卡,top命令查看獲得 buff/cache 佔據內存特別大,使用以下命令清理緩存:
swap清理:
swapoff -a && swapon -a
cache清理:
sync; sync; sync;&& echo 3 > /proc/sys/vm/drop_caches
sleep 2
echo 0 >/proc/sys/vm/drop_caches
To free pagecache:
echo 1 >/proc/sys/vm/drop_caches
To free dentries and inodes:
echo 2 >/proc/sys/vm/drop_caches
To free pagecache,dentries and inodes:
echo 3 >/proc/sys/vm/drop_caches
/proc/sys/vm/drop_caches 的值默認爲0(所以我們清空後,還再恢復它的值爲0)