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Date:      Sun, 1 Sep 2013 22:11:14 +0300
From:      Mikolaj Golub <trociny@FreeBSD.org>
To:        "Sam Fourman Jr." <sfourman@gmail.com>
Cc:        FreeBSD FS <freebsd-fs@freebsd.org>
Subject:   Re: NFS on ZFS pure SSD pool
Message-ID:  <20130901191113.GC15654@gmail.com>
In-Reply-To: <CAOFF%2BZ02Z%2BAezgQ9WufbB40P00qDL2i3iqpAfJUfbMfJ-gSeTw@mail.gmail.com>
References:  <CAOFF%2BZ2C26V3Ktuvj5RFwGN%2BH657OPXm796TqA54xOpQj1TVFg@mail.gmail.com> <258054624.15907722.1377905324980.JavaMail.root@uoguelph.ca> <20130901181630.GB15654@gmail.com> <CAOFF%2BZ02Z%2BAezgQ9WufbB40P00qDL2i3iqpAfJUfbMfJ-gSeTw@mail.gmail.com>

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On Sun, Sep 01, 2013 at 02:28:45PM -0400, Sam Fourman Jr. wrote:

> > BTW, I noticed that nfsd sets listen backlog to 5. Isn't it a bit low
> > for servers that might have hundreds clients?
> >
> 
> is there a sysctl to increase the listen backlog for nfsd?

No. It is hardcoded to 5 in nfsd.c. If it had been set to -1 instead,
the system default would have been used and could be tuned
(kern.ipc.soacceptqueue).

But my note was just an observation and I am not sure this makes any
difference in your case, without seeing netstat output.

-- 
Mikolaj Golub



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