8.0-R-p2 ZFS: unixbench causing kmem exhaustion panic

Ivan Voras ivoras at freebsd.org
Thu Jan 14 14:51:02 UTC 2010

2010/1/14 Doug Poland <doug at polands.org>:
> On Thu, January 14, 2010 03:17, Ivan Voras wrote:
>> Doug Poland wrote:
>>>> Ok, I re-ran with same config, but this time monitoring the
>>>> sysctls you requested* ( and the rest I was watching ):
>>> I failed to mention that
>>> kstat.zfs.misc.arcstats.size
>>> seemed to fluctuate between about 164,000,00 and 180,000,000 bytes
>>> during this last run
>> Is that with or without panicking?
> with a panic
>> If the system did panic then it looks like the problem is a memory
>> leak somewhere else in the kernel, which you could confirm by
>> monitoring vmstat -z.
> I'll give that a try.  Am I looking for specific items in vmstat -z?
> arc*, zil*, zfs*, zio*?  Please advise.

You should look for whatever is allocating all your memory between 180
MB (which is your ARC size) and 1.2 GB (which is your kmem size).

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