free up memory

echo 3 > /proc/sys/vm/drop_caches

By: andreisid
2012-08-05 19:35:14

6 Alternatives + Submit Alt

What Others Think

Better use sysctl instead of echo : /sbin/sysctl vm.drop_caches=3o 1 --> to free pagecache 2 --> to free dentries and inodes 3 --> to free pagecache, dentries and inodes
jlaunay · 476 weeks and 6 days ago
Why would calling sysctl be better than calling echo?
wr8cr8 · 476 weeks and 5 days ago
There is no big difference but with echo you can make a mistake, for example echo 4 or any bad value will work but sysctl is a tool especially designed to configure kernel parameters: /sbin/sysctl -w vm.drop_caches=4 sysctl: setting key "vm.drop_caches": Argument invalide vm.drop_caches = 4 Sysctl also allow you to edit /etc/sysctl.conf to make the change permanent.
jlaunay · 476 weeks and 4 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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