From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe - Profihost AG Subject: Re: poor OSD performance using kernel 3.4 => problem found Date: Thu, 31 May 2012 10:04:00 +0200 Message-ID: <4FC725F0.9040207@profihost.ag> References: <4FBE415E.8030702@profihost.ag> <4FC54CDB.1000506@inktank.com> <4FC5BF27.5060704@profihost.ag> <4FC5C941.6010105@profihost.ag> <4FC5FEC1.90103@profihost.ag> <4FC60FC8.207@inktank.com> <4FC61596.3050703@profihost.ag> <4FC62BB0.1020003@inktank.com> <4FC66A1F.1080407@profihost.ag> <4FC68CAA.9030708@profihost.ag> <4FC7197D.5010406@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mail.profihost.ag ([85.158.179.208]:46185 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753452Ab2EaIDx (ORCPT ); Thu, 31 May 2012 04:03:53 -0400 In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Stefan Majer Cc: Mark Nelson , yehuda@inktank.com, "ceph-devel@vger.kernel.org" Am 31.05.2012 09:27, schrieb Stefan Majer: > we have set them in /etc/sysctl.conf to: > net.ipv4.tcp_mem = 10000000 10000000 10000000 This does not help ;-( > wow, this was fast ! > if i understand this commit correct it simply skips a in-kernel > configuration of network related sysctl parameters, especialy > net.ipv4.tcp_mem I also tied this one: net.ipv4.tcp_rmem = 4096 524287 16777216 net.ipv4.tcp_wmem = 4096 524287 16777216 # grabbed values from 3.0.X net.ipv4.tcp_mem = 1162962 1550617 2325924 still - no help -. But if i use 3.4 and revert the commit it works fine. But i wasn't able to find which other parts are influenced by this limit while browsing through the source. I only found: net.ipv4.tcp_mem and net.ipv4.tcp_rmem and net.ipv4.tcp_wmem Greets Stefan