Tr : NFSv4 idmapd memory consumption problem

[J. Bruce Fields]

On Thu, Aug 31, 2006 at 04:23:20PM +0200, pierre_stephane.baton at alcatelaleniaspace.com wrote:
> More than you think, with Clearcase's vobs (with their #{|][# of virtual 
> file system) and others, if the changes of the mounted directories are 
> stored in the memory, the giga used is not realy strange. As those WS are 
> up for 17 days now, some informations has to  be logged by idmapd or be 
> deleted, or it should use all RAM memory.

OK.  Actually looking at the names of clients in that directory, I guess
you've seen some a few hundred thousand of them; divide that into a gig,
and it looks like we're leaking a few K on each mount.

That's weird.  Well, it'd probably be easy enough to reproduce:

	while true:
		mount some nfs filesystem
		unmount it

and watch idmapd.

--b.