From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:36251 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757189AbaISPGB (ORCPT ); Fri, 19 Sep 2014 11:06:01 -0400 Message-ID: <541C464F.3030600@fb.com> Date: Fri, 19 Sep 2014 11:05:51 -0400 From: Josef Bacik MIME-Version: 1.0 To: , Subject: Re: Performance Issues References: <1411129114.1811.7.camel@zarniwoop.blob> In-Reply-To: <1411129114.1811.7.camel@zarniwoop.blob> Content-Type: text/plain; charset="utf-8"; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: On 09/19/2014 08:18 AM, Rob Spanton wrote: > Hi, > > I have a particularly uncomplicated setup (a desktop PC with a hard > disk) and I'm seeing particularly slow performance from btrfs. A `git > status` in the linux source tree takes about 46 seconds after dropping > caches, whereas on other machines using ext4 this takes about 13s. My > mail client (evolution) also seems to perform particularly poorly on > this setup, and my hunch is that it's spending a lot of time waiting on > the filesystem. > Weird, I get the exact opposite performance. Anyway it's probably because of your file layouts, try defragging your git dir and see if that helps. Thanks, Josef