Received: from maia.hub.org (unknown [200.46.208.211]) by mail.postgresql.org (Postfix) with ESMTP id 95C6F632CFF for ; Tue, 2 Mar 2010 19:56:59 -0400 (AST) 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 49950-10 for ; Tue, 2 Mar 2010 23:56:42 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail-wy0-f174.google.com (mail-wy0-f174.google.com [74.125.82.174]) by mail.postgresql.org (Postfix) with ESMTP id C7C77632D07 for ; Tue, 2 Mar 2010 19:56:47 -0400 (AST) Received: by wya21 with SMTP id 21so459885wya.19 for ; Tue, 02 Mar 2010 15:56:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=osQkwfkf+g6ow/frioyBW1YMxRxlahsn5tY6ArOpd7Q=; b=Y9TRAyNj+RuRxInnrIkGnisqYvnfMqCYYU2EorCDYvh05+obyW2/gbZw42qzgcB2gu aHz/bpTDogrfxxniTZ2GTdGXyU38klQpdOCFI6R1yN1aIBOzHU93LBQGRhCiFmERYT7A qb4xr9M3Pa3mCTDZPik+3qr+35dWyg6V7cj3g= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=qyfBwhSYSeympljJQmp9xo0QJc2VAVSVblWFTMgIUotBl0G69UTuhmg3F7twzyDbd+ 4SFK8z67A48cKrZoIVB2mrSdn661Ua0evxH91n7WfJexClsS/9+0TTy83JDq6jvEii3n HGISJ1NgZYu7OOsSLamYgrOXR1lkSE+qp2Kcg= MIME-Version: 1.0 Received: by 10.216.87.208 with SMTP id y58mr1914258wee.30.1267574206244; Tue, 02 Mar 2010 15:56:46 -0800 (PST) In-Reply-To: <4B8DA42A.7020806@2ndquadrant.com> References: <4B8DA42A.7020806@2ndquadrant.com> Date: Tue, 2 Mar 2010 16:56:46 -0700 Message-ID: Subject: Re: 10K vs 15k rpm for analytics From: Scott Marlowe To: Greg Smith Cc: Francisco Reyes , Pgsql performance Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-1.049 tagged_above=-10 required=5 tests=AWL=-1.050, BAYES_50=0.001 X-Spam-Level: X-Archive-Number: 201003/44 X-Sequence-Number: 37869 On Tue, Mar 2, 2010 at 4:50 PM, Greg Smith wrote: > If you only have 2 or 3 connections, I can't imagine that the improved se= ek > times of the 15K drives will be a major driving factor. =A0As already > suggested, 10K drives tend to be larger and can be extremely fast on > sequential workloads, particularly if you short-stroke them and stick to > putting the important stuff on the fast part of the disk. The thing I like most about short stroking 7200RPM 1 to 2 TB drives is that you get great performance on one hand, and a ton of left over storage for backups and stuff. And honestly, you can't have enough extra storage laying about when working on databases.