From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Reinecke Subject: Re: memory consumption of multipathd after Upgrade SLES 10 SP2 -> SLES 11 Date: Mon, 19 Oct 2009 08:16:51 +0200 Message-ID: <4ADC0453.9010406@suse.de> References: <200910161720.42414.sebastia@l00-bugdead-prods.de> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <200910161720.42414.sebastia@l00-bugdead-prods.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: device-mapper development List-Id: dm-devel.ids Sebastian Reitenbach wrote: > Hi, >=20 > I use multipath tools to manage the multiple ways through the SAN conne= cted=20 > via FC. The server sees two paths per LUN. There are 15 LUNs presented = to the=20 > server. >=20 > I upgraded two server to SLES 11, installed latest patches, running ker= nel: > Linux server1 2.6.27.29-0.1-xen #1 SMP 2009-08-15 17:53:59 +0200 x86_64= x86_64=20 > x86_64 GNU/Linux >=20 > multipath-tools-0.4.8-40.4.1 >=20 > There I recognized a fairly large amount of memory used by multipathd: > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 5367 root RT 0 238m 140m 2804 S 0 28.1 0:34.70 multipathd >=20 > I see the huge memory consumption on both of the servers.=20 >=20 >=20 > On a different server, not yet upgraded, running SLES 10 SP2, with diff= erent=20 > SAN storages applied, there I run kernel: > Linux server2 2.6.16.60-0.34-xen #1 SMP Fri Jan 16 14:59:01 UTC 2009 x8= 6_64=20 > x86_64 x86_64 GNU/Linux > with multipath tools: > multipath-tools-0.4.7-34.40 > There I have 20 LUNs presented, and the server sees 4 paths per LUN, I = in top=20 > a much fewer memory consumption: > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 4796 root RT 0 11928 4808 2220 S 0 1.6 0:01.37 multipathd >=20 >=20 > However, both of the servers running SLES 11 work fine so far, no "erro= rs"=20 > recognized. I still wonder whether the large memory consumption is corr= ect, as=20 > I expected sth. similar as on the SLES10 SP2 hosts.=20 > Below the configuration file I use on the SLES 11 servers. >=20 This is a known regression with SLES11. Please update to the latest maintenance release. Cheers, Hannes --=20 Dr. Hannes Reinecke zSeries & Storage hare@suse.de +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 N=FCrnberg GF: Markus Rex, HRB 16746 (AG N=FCrnberg)