Good suggestion, but nope, that ain't it: $ cat /proc/sys/vm/zone_reclaim_mode 0
On Wed, Jul 30, 2014 at 11:49 AM, Merlin Moncure <mmonc...@gmail.com> wrote: > On Wed, Jul 30, 2014 at 12:51 PM, Kevin Goess <kgo...@bepress.com> wrote: > > A couple months ago we upgraded the RAM on our database servers from > 48GB to > > 64GB. Immediately afterwards the new RAM was being used for page cache, > > which is what we want, but that seems to have dropped off over time, and > > there's currently actually like 12GB of totally unused RAM. > > > > > http://s76.photobucket.com/user/kgoesspb/media/db1-mem-historical.png.html > > > > Is that expected? Is there a setting we need to tune for that? We have > > 400GB of databases on this box, so I know it's not all fitting in that > > 49.89GB. > > could be a numa issue. Take a look at: > > http://frosty-postgres.blogspot.com/2012/08/postgresql-numa-and-zone-reclaim-mode.html > > merlin > -- Kevin M. Goess Software Engineer Berkeley Electronic Press kgo...@bepress.com 510-665-1200 x179 www.bepress.com bepress: sustainable scholarly publishing
