Date: Thu, 17 May 2007 11:19:03 +0200 From: David Touitou <david@solexine.fr> To: Tom Judge <tom@tomjudge.com> Cc: lydianconcepts@gmail.com, freebsd-performance@freebsd.org, Randy Schultz <schulra@earlham.edu> Subject: Re: possible issues with Dell/Perc5 raid Message-ID: <464C1E07.1000403@solexine.fr> In-Reply-To: <464474F0.3040306@tomjudge.com> References: <Pine.BSF.4.64.0705101545340.34925@tdream.lly.earlham.edu> <464474F0.3040306@tomjudge.com>
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Hello all, Tom Judge a écrit : > From the boot messages you have included below it seems that you have a > Dell SAS-5i (Internal PCIe) controller and not a Perc/5[ie]. > > The SAS-5 known to have very poor performance (1Mb/s 100%busy) under > certain loads (cvsup). I have something that looks like the same kind of problem, on a PE860 with SAS-5i and two SATA 160GB HD in RAID 1. The server is a webserver and "top -S" shows very high CPU usage (idle is 0%, user CPU is 40%, system CPU is 60%, interupt is 0%) when running 60 concurents httpd threads... I've browsed quite a bit arround this issue and ended in this thread (plus several other threads arround the same problem). I've just realised Dell has released a new firmware on 17 of april (beware of long URL) : http://support.euro.dell.com/support/downloads/download.aspx?c=fr&cs=RC1077983&l=fr&s=pad&releaseid=R149732&formatcnt=6&libid=0&fileid=199166 Has anyone tried it ? Best, David.
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