# 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!
