Received: from maia.hub.org (unknown [200.46.208.211]) by mail.postgresql.org (Postfix) with ESMTP id 9C6CF634381 for ; Tue, 30 Mar 2010 12:19:06 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.208.211]) (amavisd-maia, port 10024) with ESMTP id 17913-01-10 for ; Tue, 30 Mar 2010 15:18:48 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by mail.postgresql.org (Postfix) with ESMTP id 5F14D633CE2 for ; Tue, 30 Mar 2010 12:15:55 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.2/8.14.2) with ESMTP id o2UFFqks019070; Tue, 30 Mar 2010 11:15:52 -0400 (EDT) To: Renato Oliveira cc: Tino Schwarze , "pgsql-admin@postgresql.org" Subject: Re: Migrate postgres to newer hardware In-reply-to: <7965A9DCF12CC14984420BCC37B1608F25AB1AEE51@Elzar.grant.co.uk> References: <7965A9DCF12CC14984420BCC37B1608F25AB1AED49@Elzar.grant.co.uk> <1269959369.15416.5.camel@deimos> <20100330143831.GE17567@easy5.in-chemnitz.de> <7965A9DCF12CC14984420BCC37B1608F25AB1AEE51@Elzar.grant.co.uk> Comments: In-reply-to Renato Oliveira message dated "Tue, 30 Mar 2010 15:51:47 +0100" Date: Tue, 30 Mar 2010 11:15:52 -0400 Message-ID: <19069.1269962152@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-2.464 tagged_above=-10 required=5 tests=AWL=0.135, BAYES_00=-2.599 X-Spam-Level: X-Archive-Number: 201003/251 X-Sequence-Number: 34050 Renato Oliveira writes: > If I use postgres 32 bit will it benefit from the extra memory on the system? Yes, although perhaps not as much as you'd get with a 64-bit build. You still get the ability to have more than 4GB worth of kernel-managed disk cache, and in many situations that's all the value of a 64-bit machine anyway. You can find lots and lots about that in the pgsql-performance archives. regards, tom lane