[linuxkernelnewbies] drop_caches | LinuxInsight

[Peter Teoh]

http://www.linuxinsight.com/proc_sys_vm_drop_caches.html drop_caches Submitted by admin on Wed, 2006-05-31 16:12 Writing to this will cause the kernel to drop clean caches, dentries and inodes from memory, causing that memory to become free. 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 As this is a non-destructive operation, and dirty objects are not freeable, the user should run "sync" first in order to make sure all cached objects are freed. This tunable was added in 2.6.16.