Centos Ram缓存清理

一.清理yum缓存

清理yum缓存使用yum clean 命令,yum clean 的参数有headers, packages, metadata, dbcache, plugins, expire-cache, rpmdb, all

yum clean headers#清理/var/cache/yum的headersyum clean packages#清理/var/cache/yum下的软件包yum clean metadata...

1.yum clean headers     #清理/var/cache/yum的headers

2yum clean packages  #清理/var/cache/yum下的软件包

3yum clean metadata 

4............

二.Linux释放内存

1.释放网页缓存(To free pagecache):

echo 1 > /proc/sys/vm/drop_caches

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

echo 2 >/proc/sys/vm/drop_caches

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

echo 3 >/proc/sys/vm/drop_caches

三.Linux内存查看

[root@localhost ~]# free -m    #查看内存

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