From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe - Profihost AG Subject: Re: ceph-osd cpu usage Date: Thu, 15 Nov 2012 13:19:52 +0100 Message-ID: <50A4DDE8.8040506@profihost.ag> References: <7840e3d1-17b2-4618-ae1f-ff3dbdff71f6@mailpro> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail.profihost.ag ([85.158.179.208]:53761 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1767606Ab2KOMUB (ORCPT ); Thu, 15 Nov 2012 07:20:01 -0500 In-Reply-To: <7840e3d1-17b2-4618-ae1f-ff3dbdff71f6@mailpro> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Alexandre DERUMIER Cc: ceph-devel@vger.kernel.org Am 15.11.2012 12:18, schrieb Alexandre DERUMIER: > cpu usage is same for read and write ? no for read it is just around 25%. And i get "full" (limited by rbd /=20 librbd) 23.000 iops per vm. > ----- Mail original ----- > > De: "Stefan Priebe - Profihost AG" > =C3=80: ceph-devel@vger.kernel.org > Envoy=C3=A9: Jeudi 15 Novembre 2012 11:56:37 > Objet: ceph-osd cpu usage > > Hello list, > > my main problem right now is that ceph does not scale for me (more vm= s > using rbd). It does not scale as the ceph-osd is using all my CPU cor= e > all the time (8 cores) with just 4 SSDs. The SSDs are far away from > being loaded. > > What is the best way to find out what the ceph-osd process is doing a= ll > the time? > > A gperf graph is attached. > > Greets, > Stefan > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html