On Tue, Jul 17, 2012 at 7:52 PM, Greg Smith <greg@xxxxxxxxxxxxxxx> wrote: > Newer Linux systems with lots of cores have a problem I've been running into > a lot more lately I wanted to share initial notes on. My "newer" means > running the 2.6.32 kernel or later, since I mostly track "enterprise" Linux > distributions like RHEL6 and Debian Squeeze. The issue is around Linux's > zone_reclaim feature. When it pops up, turning that feature off help a lot. > Details on what I understand of the problem are below, and as always things > may have changed already in even newer kernels. SNIP > Scott Marlowe has been griping about this on the mailing lists here for a > while now, and it's increasingly trouble for systems I've been seeing lately > too. This is a well known problem with MySQL: > http://blog.jcole.us/2010/09/28/mysql-swap-insanity-and-the-numa-architecture/ Thanks for the link, I'll read up on it. I do have access to large (24 to 40 core) NUMA machines so I might try some benchmarking on them to see how they work. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
