On Wed, Jul 30, 2014 at 12:57 PM, Kevin Goess <kgo...@bepress.com> wrote: > 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 > Good suggestion, but nope, that ain't it: > > $ cat /proc/sys/vm/zone_reclaim_mode > 0
Could it just be your dataset isn't any bigger than what's being used? -- To understand recursion, one must first understand recursion. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
