I too have noticed this with my backup processes since using this kernel. I have also noticed that swap usage goes much higher at the time of doing the backup (using tar with gzip compression), even though there is plenty of RAM available. In fact, the RAM usage goes down while the swap goes up !!!! I've tried setting swappiness to 0 but this only has a small effect. I'm now going to switch back to kernel 2.6.32-279.22.1.el6.x86_64
Regards Bill Maidment Maidment Enterprises Pty Ltd N.B. Any email disclaimer in the original message has been carefully ignored as it has no meaning in law. -----Original message----- > From:Orion Poplawski <[email protected] <mailto:[email protected]> > > Sent: Friday 5th April 2013 3:26 > To: [email protected] <mailto:[email protected]> > Subject: IO performance regressions with kernel-2.6.32-358 > > Is anyone else seeing IO performance regressions with kernel-2.6.32-358? > We have a SL6.3 machine that serves a dual purpose of VM host and runs > our amanda backups to local disk. Since booting kernel-2.6.32-358 our > backups are taking significantly longer (and estimates are timing out). > Have not yet had the chance to boot back to an earlier kernel. Since > it also hosts some VMs (although they tend to be lightly loaded) it > might more related to that. > > - Orion > >
