my solution appears to have fixed the problems I was seeing for a little over a week now. As such - reported to Centos for fixing...
http://bugs.centos.org/view.php?id=5716 Cheers J. On Wed, May 9, 2012 at 10:28 AM, Jason Ball <[email protected]> wrote: > I've seen a similar problem that took several weeks to identify. > > There is an issue with transparent hugepage support (aka memory defrag) > where it causes processes on a server to stall and a number of other weird > symptoms, I actually suspected dodgy drivers for one of my raid controllers > before I found the cause. > > The solution (in my case) was to disable this facility: > > > echo no > /sys/kernel/mm/redhat_transparent_hugepage/khugepaged/defrag > echo never >/sys/kernel/mm/redhat_transparent_hugepage/defrag > > It's worth noting that this setting appears to be disabled by default on > RHEL6 installations, but enabled on Centos 6. > > > Cheers > Jason. > > > > On Wed, May 9, 2012 at 10:15 AM, Michael Fox <[email protected]> wrote: > >> In which case, enable sysstat on centos if it's not already. will help >> moving forward.. >> >> On Wed, May 9, 2012 at 10:11 AM, Grant Street <[email protected]> wrote: >> >> > 16 core, 12-24G memory running centos 6.1 >> > >> > >> > On 09/05/12 10:08, David Lyon wrote: >> > >> >> Are they dual core ? >> >> >> >> Do they have a sheetload of memory ? >> >> >> >> I found ubuntu got slower and slower till I got in >> >> newer hardware. >> >> >> > >> > -- >> > SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ >> > Subscription info and FAQs: http://slug.org.au/faq/**mailinglists.html< >> http://slug.org.au/faq/mailinglists.html> >> > >> -- >> SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ >> Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html >> > > > > -- > -- > Teach your kids Science, or somebody else will :/ > > [email protected] > [email protected] <[email protected]> > callsign: vk2vjb > > > -- -- Teach your kids Science, or somebody else will :/ [email protected] [email protected] <[email protected]> callsign: vk2vjb -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
