Date: Wed, 19 May 2004 17:10:50 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Eric Anderson <anderson@centtech.com> Cc: freebsd-questions@freebsd.org Subject: Re: Max NFSD processes Message-ID: <20040519221048.GA86452@dan.emsphone.com> In-Reply-To: <40ABD7C8.7050405@centtech.com> References: <40ABD7C8.7050405@centtech.com>
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In the last episode (May 19), Eric Anderson said: > I have several heavily used NFS servers, currently running FreeBSD > 4.9-RELEASE. I'm getting jammed up with all my nfsd processes being > busy, so clients see slow connections to the server. I have the nfsd > starting with a count of 20, which is the max set in the nfsd.c file. > > Are there any risks I should be aware of before bumping up the max to > say 40, or even 50? > > What would it take to make this a sysctl adjustable value? > > Should the max be bumped higher by default nowdays? What's the output of "ps ax | grep nfsd"? How much CPU does the last nfsd process have? If your backend storage is a RAID with lots of disks, and your last nfsd is actually getting some use, then bumping up the nfsds will probably help. Although if you're hitting a kernel bottleneck (locking for example), more nfsds won't do any good. -- Dan Nelson dnelson@allantgroup.com
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