You could find reference from here:
http://jingyan.baidu.com/article/597a06436a687f312b5243f3.html
Basically it looks like this:
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清理前内存使用情况
free –m
或者
free
清理内存
echo 1 > /proc/sys/vm/drop_caches
清理后内存使用情况
free -m
完成!
查看内存条数命令：
dmidecode |grep -A16 "Memory Device$"
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explaination:
the
echo 1 > /proc/sys/vm/drop_caches
this will make system drop caches. Then vacancy comes out.
linux memory release commands内存清理/释放命令
原文：http://www.cnblogs.com/spaceship9/p/4306206.html