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List:       freebsd-hackers
Subject:    Re: Slow nfsd write performance, tweaks needed
From:       "Mark Schouten" <mark () tuxis ! nl>
Date:       2014-12-04 12:26:15
Message-ID: 20141204122615.b85ad6cf () kerio ! tuxis ! nl
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Hi,

> The box is stable, but performs terribly. Surely, I'm doing something wrong,
> but I would like some tips and tricks to speed things up.

I thought it would be nice to update you on this issue.

I performed an upgrade to 10.1 on the productionbox, which helped in my test-setup. \
But it didn't in my productionsetup. However, it did show another issue:

da4p1     ONLINE       0     0     0  block size: 512B configured, 4096B native

Which I now fixed with a new pool and ashift=12. That fixed a lot. I can now write to \
the box, filling the gigabit with NFS traffic and not showing an enormous delay in \
replies. I'm also quite sure that the testbox had ashift=12...

All other changes did not influence performance much.

Now, there's only one issue left: Enabling cache-devices activates a memoryleak (I \
think)...

-- 
Kerio Operator in de Cloud? https://www.kerioindecloud.nl/
Mark Schouten  | Tuxis Internet Engineering
KvK: 61527076 | http://www.tuxis.nl/
T: 0318 200208 | info@tuxis.nl
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