[CentOS] Excessive NFS operations

Thu Sep 10 14:25:45 UTC 2009
Lars Hecking <lhecking at users.sourceforge.net>

> 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?