From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ee0-f49.google.com (mail-ee0-f49.google.com [74.125.83.49]) by kanga.kvack.org (Postfix) with ESMTP id 996016B0036 for ; Mon, 28 Apr 2014 19:57:30 -0400 (EDT) Received: by mail-ee0-f49.google.com with SMTP id e53so52651eek.8 for ; Mon, 28 Apr 2014 16:57:29 -0700 (PDT) Received: from mail.anarazel.de (mail.anarazel.de. [217.115.131.40]) by mx.google.com with ESMTP id v2si24763591eel.346.2014.04.28.16.57.29 for ; Mon, 28 Apr 2014 16:57:29 -0700 (PDT) Date: Tue, 29 Apr 2014 01:57:14 +0200 From: Andres Freund Subject: Re: [Lsf] Postgresql performance problems with IO latency, especially during fsync() Message-ID: <20140428235714.GA16070@awork2.anarazel.de> References: <20140326191113.GF9066@alap3.anarazel.de> <20140409092009.GA27519@dastard> <20140428234756.GM15995@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140428234756.GM15995@dastard> Sender: owner-linux-mm@kvack.org List-ID: To: Dave Chinner Cc: rhaas@anarazel.de, linux-kernel@vger.kernel.org, lsf@lists.linux-foundation.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Wu Fengguang Hi Dave, On 2014-04-29 09:47:56 +1000, Dave Chinner wrote: > ping? I'd replied at http://marc.info/?l=linux-mm&m=139730910307321&w=2 As an additional note: > On Wed, Apr 09, 2014 at 07:20:09PM +1000, Dave Chinner wrote: > > I'm not sure how you were generating the behaviour you reported, but > > the test program as it stands does not appear to be causing any > > problems at all on the sort of storage I'd expect large databases to > > be hosted on.... A really really large number of database aren't stored on big enterprise rigs... Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org