FreeBSD +NFS + mail services

[Darren Pilgrim]

From: Francisco Reyes [mailto:lists at stringsutils.com] 
> Darren Pilgrim writes:
>
<discussion about not seeing apparently idle nfsiod threads exiting>
> 
> > What's the value of vfs.nfs.iodmin on these machines?
> 
> vfs.nfs.iodmin: 4
> 
> Which was the default.

The default setting requires the thread to sleep for a full two minutes
before exiting.  It would be easy to generate a real workload light enough
to be below process time accounting precision (which is really low even on
modest hardware), yet still give the kthread something to do every t <
iodmaxidle seconds.

If you make iodmaxidle very short, say 5, do you see nfsiod threads
recycling?