> In the process of trying to debug some latency on my NFS server, I set
> some settings in /etc/system that were mentioned over on Solaris
> Internals (specifically,
> http://www.solarisinternals.com/wiki/index.php/Application_Specific_Tun
> ing#NFS_Server).
> Around the time when our backups started, our server stopped
> responding. Hooray!
:-(
> The T2000 in question has 8GB of RAM, and I believe 4 cores. We use
> EMC Networker for backup software; however, I imagine one of these new
> settings are to blame.
>
> /etc/default/nfs now has:
> NFSD_SERVERS=1024
> (whereas before it was 16)
>
> My /etc/system:
Don't you have a backup of those files? Couldn't you just restore those
files?
> clh-1-r> sar -f /var/adm/sa/sa09 -g
>
> One thing I should do as a (somewhat) new Solaris admin, is get more
> familiar with these benchmarks. Is there a book in particular that
> anyone recommends?
The world, especially solaris, is changing so fast, I don't think a book is
the way to go. I suggest the opensolaris-discuss and opensolaris-help and
zfs-discuss mailing lists. If you're using "Solaris" and not opensolaris,
you might just mention that in any post where it would be relevant.
Sometimes it makes a difference.
You should also become familiar with:
iostat
zpool iostat
nfsstat
And there's another one ... etherstat? netstat? I forget.
> My guess is the ncsize parameter is to blame here; I honestly am not
> 100% though. Is there anything else I should be looking at?
> /var/adm/messages has nothing good for me.
> And, does anyone have good NFS server tuning advice they'd like to
> share?
What is your server OS?
What is the client OS?
How are your server disks configured? (ZFS, hardware raid, software raid,
SSD ZIL or L2ARC etc)
Is everything working on a flat LAN?
What are the performance issues you're seeing?
I have always needed to tune Linux NFS servers, and have never needed to
tune solaris NFS servers. Solaris is simply much stronger by way of NFS.
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