DEBUG mode and ZFS arc size

Steven Hartland killing at multiplay.co.uk
Wed Sep 25 10:05:54 UTC 2013


INVARIANTS on head enables ZFS debugging which may be changing something
but its not expected if it does so more info on this would be needed.

"zfs-stats -a" would be a good place to start

    Regards
    Steve
----- Original Message ----- 
From: "Volodymyr Kostyrko" <c.kworr at gmail.com>
To: "freebsd-fs" <freebsd-fs at FreeBSD.org>
Sent: Wednesday, September 25, 2013 10:03 AM
Subject: DEBUG mode and ZFS arc size


> Hi all.
> 
> I have some problems on one of my machines and I have recompiled kernel 
> there with:
> 
> option KDB
> option KDB_TRACE
> option KDB_UNATTENDED
> option DDB
> 
> option DEBUG_MEMGUARD
> option DEBUG_REDZONE
> 
> option INVARIANTS
> option INVARIANT_SUPPORT
> option DIAGNOSTIC
> 
> option WITNESS
> option WITNESS_SKIPSPIN
> 
> Before this ZFS can take gigs of memory (there are 64Gb RAM on the 
> server) but now it only takes not more than 4Gb. Am I missing something 
> in my configuration or is this the way it should work?
> 
> -- 
> Sphinx of black quartz, judge my vow.
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