摘要：当linux系统出现本文所说的这种内存只升不降的情况时，大家可以试一下在linux终商执行一下以下的这种命令。To free pagecache:echo 1 > proc sys vm drop_...

当linux系统出现本文所说的这种内存只升不降的情况时，大家可以试一下在linux终商执行一下以下的这种命令。

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

Kernels 2.6.16 and newer provide a mechanism to have the kernel drop the page cache and/or inode and dentry caches on command, which can help free up a lot of memory. Now you can throw away that script that allocated a ton of memory just to get rid of the cache...

To use /proc/sys/vm/drop_caches, just echo a number to it.