Re: xfs and Linux Linux 2.6.22 and Memory

[Eric Sandeen <sandeen@xxxxxxxxxxx>]

Mariella Petrini wrote:

> QUESTION:
> 
> Is there any way to release that amount of memory
> without unmounting the file systems ?
> Is that caused to some caching mechanism ?
> Or could that be caused by something else ?

It's most likely the linux VFS caching the dentries & inodes, and
therefore caching the xfs inodes as well.

cat /proc/sys/fs/dentry-state and /proc/sys/fs/inode-state to see how
many are in memory, how many are active, and the age limit.

slabtop would fairly easily show you how much is in the dentry_cache &
the inode_cache too.

Are you actually seeing a problem with this (caching is generally good)
or just curious?

-Eric