memory exhaustion on 10.1 AMD64 ZFS storage system

[Joseph Mingrone]

"Mark Schouten" <mark at tuxis.nl> writes:
>> We've had this storage system running 9.x without problems.  After
>> upgrading to 10.1 we've seen "out of swap space" messages in the logs.
>> 
>> Dec 13 04:29:12 storage2 kernel: pid 723 (rpc.statd), uid 0, was killed:
>> out of swap space
>
> Do you have compression enabled and L2ARC? There's this bug that leaks
> memory via L2ARC, causing all memory to run out, pushing out the ARC
> and (probably) causes crashes and lots of swap usage..

Indeed we do.

> I think this is about that bug:
> https://github.com/freebsd/freebsd/commit/b98f85d480b770e34d5e08c66dbc668bd5548bdc

It looks this was from November 6th, 2014 and it says "MFC after: 2
weeks", so I'll try moving to 10-STABLE.

Thanks,

Joseph