On Thu, Jun 5, 2014 at 10:58 AM, Jeff Janes <jeff.janes@xxxxxxxxx> wrote: > This sounds like a kernel problem, probably either the zone reclaim issue, > or the transparent huge pages issue. I at first thought maybe same, but I don't think THP was introduced until 2.6.38...OP is running 2.6.32-431.11.2.el6.x86_6. Maybe it's NUMA related, but would not be idiomatic of NUMA issues as I understand them (poor memory utilization/high IO utilization). Would be a very cheap/easy thing to try though. Is this server virtualized? merlin
