Date: Wed, 14 Sep 2005 19:59:13 -0300 From: Mariano Benedettini <diodex@gmx.net> To: Kris Kennaway <kris@obsecurity.org> Cc: freebsd-stable@freebsd.org Subject: Re: High load averages on a 5.3-RELEASE Message-ID: <4328AB41.4050009@gmx.net> In-Reply-To: <20050914202041.GA95963@xor.obsecurity.org> References: <32422.1126728707@www84.gmx.net> <20050914202041.GA95963@xor.obsecurity.org>
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Kris: Thanks for your answer. What is the best way to measure the NFS performance ? Mariano. Kris Kennaway wrote: > On Wed, Sep 14, 2005 at 10:11:47PM +0200, Mariano Benedettini wrote: > >>Hi people, I've also posted this message to freebsd-performance, with no >>answer. >>I have a mail server running FreeBSD 5.3-RELEASE. It's a dual Xeon with 4gb >>of ram. >>The server is running Apache (serving Horde) , Postfix, Courier imapd w/SSL, >>Amavisd. Also a Postgresql as Horde's storage. >>The mail storage is accessed via NFS (this server is the nfs client). >>The problem is that it's experiencing a really high load average (see the >>top -S and vmstat -systat ) while the CPU's are relatively idle. I think >>it's a IO problem >>(nfs?), but I cant figure out what exactly is causing this. > > > Load average doesn't indicate a performance problem, it indicates a > lot of tasks running on your machine (which after all, is what > computers are designed to do :-). Poor performance indicates a > performance problem :-) > > You should measure your NFS performance to see if it is acceptable. > Upgrading to 5.4 or (better) 6.0 when it is released should provide > network and filesystem performance benefits, in general. > > Kris
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