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Date: Mon, 22 Oct 2012 19:56:17 +0200
From: Marcus Larsson <kore@mindwipe.org>
To: Shaun Thomas <sthomas@optionshouse.com>
Cc: Claudio Freire <klaussfreire@gmail.com>,
	"pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>
Subject: Re: Tons of free RAM. Can't make it go away.
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On Mon, Oct 22, 2012 at 12:49:49PM -0500, Shaun Thomas wrote:
 
> Trust me, there's plenty. We have a DB that's 6x larger than RAM
> that's currently experiencing 6000TPS, and according to iostat,
> anywhere from 20-60% disk utilization that's mostly reads.

Could it be related to zone_reclaim_mode? What is vm.zone_reclaim_mode set to?

/marcus