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Linux释放内存

2020-04-06 0条评论 2.1k次阅读 计算机网络/服务器


释放网页缓存(To free pagecache):

sync; echo 1 > /proc/sys/vm/drop_caches

释放目录项和索引(To free dentries and inodes):

sync; echo 2 > /proc/sys/vm/drop_caches

释放网页缓存,目录项和索引(To free pagecache, dentries and inodes):

sync; echo 3 > /proc/sys/vm/drop_caches

下面是我实际的数据:

[root@localhost ~] free -m    #查看内存
              total        used        free      shared  buff/cache   available
Mem:            481         224         120           1         136         202
Swap:          1023         283         740
[root@localhost ~] sync; echo 3 > /proc/sys/vm/drop_caches 
[root@localhost ~] free -m    #从120到186,释放了66m的内存
              total        used        free      shared  buff/cache   available
Mem:            481         209         186           1          85         222
Swap:          1023         283         740

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