[CentOS] Excessive NFS operations
Lars Hecking
lhecking at users.sourceforge.net
Thu Sep 10 14:25:45 UTC 2009
> We had a similar issue with 100 CentOS 5 and Fedora 7 desktops mounting
> their $HOME directories from a Centos 4 server. We would see a steady
> (perfectly linear) increase of getattr and lookup requests from the time
> users logged in until they shutoff their machines (logging off stopped
> the linear growth but didn't always bring the number of requests down).
> Running hundreds of dstats and straces finally showed that the gamin
> package on each of the clients was causing all of the requests and
> simply killing that single process would instantly drop the getattr
> requests from 200 a second down to 3 or 4 a second where it should be.
> That was 200 per client so you can imagine how bad it would get! We
> rebuilt the gamin-0.1.9-5.rpm package and deployed it to all of the
> machines. We instantly saw improvement and we currently average 3
> getattr requests a second. I don't know if this will help your situation
> but maybe someone will benefit.
Intriguing. Chris, did you have this problem with all architectures?
Did you apply any patches when rebuilding gamin?
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