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Subject: Re: 8.0-R-p2 ZFS: unixbench causing kmem exhaustion panic
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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? 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.