On Fri, Feb 24, 2012 at 12:10:43AM +0100, Arno Wagner spake thusly: > I notice that you are using a really, really old kernel. > 2.6.18 is from end of 2006 or so. There were some > performance issues with the dm-layer, they might just > still be in this old version. Yep. Unfortunately, this is in a big corporate production environment which is way behind and difficult to arrange an upgrade. As you no doubt are aware, 2.6.18 is the standard kernel in RHEL/CentOS 5. We really need to move to 6 for a lot of reasons but that is a long story. > With 3.2.5 I basically see that IO is CPU limited > or going at full speed if the CPU is fast enough. > I have not tries a MySQL dump though, although this > should just be standard disk accesses. Are you aware of anything in 2.6.18 which might actually cause this? It is hard to push for a serious upgrade to our standard database build on the basis that it "might" fix the problem. -- Tracy Reed _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
