Nope, they are on local storage.  Anyway, what do you find "unlikely" ?  This 
is 100% reproducible across many machines, centos 5.4 all the way through 5.8. 
Some with stock installed kernel, some with the very latest from RedHat.  I 
haven't tested yet on CentOS 6.x.

On Jul 13, 2012, at 10:20 PM, Steve Shipway wrote:
> Unlikely, but do your RRD files reside on an NFS filesystem?  There is a 
> known problem with using mmap on NFS'd files.
> 
> Steve
> 
> Steve Shipway
> University of Auckland ITS
> UNIX Systems Design Lead
> s.ship...@auckland.ac.nz
> Ph: +64 9 373 7599 ext 86487

-- 
Jo Rhett
Net Consonance : net philanthropy to improve open source and internet projects.



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