"Oddness" in head since around r343678 or so

[Niclas Zeising]

On 2019-02-08 10:27, Alexander Leidinger wrote:
> Hi,
> 
> I recently noticed some generic slowness myself. I experienced this 
> during replacing disks in a raidz by bigger ones. Long story short, 
> check top -s if you have vnlru running for a long period at high CPU... 
> If yes increase kern.maxvnodes (I increased to 10 times). Note, we 
> should improve the admin page in the FAQ, the vnlru entry could need a 
> little bit more hints and explanations.
> 
> If you encounter the same issue we have probably introduced a change 
> somewhere with an unintended side effect.
> 
> Bye,
> Alexander.
> 

Hi!
I'm seeing this as well, on 13-CURRENT.  I updated a computer from the 
last January snapshot (30 or 31 of January, I can't remember) and it 
seems disk IO is very slow.  I remember having a svn checkout taking a 
very long time, with the SVN process pegged at 100% according to top.  I 
can't see the vnlru process running though, but I haven't looked 
closely, and I haven't tried the maxvnodes workaround.  Something has 
changed though.
This is systems using ZFS, both mirror and single disk.  Gstat shows 
disks are mostly idle.

I know this is a lousy bug report, but this, and the feeling that things 
are slower than usual, is what I have for now.
Regards
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