[Bug 187594] [zfs] [patch] ZFS ARC behavior problem and fix

[Steven Hartland]

----- Original Message ----- 
From: <bugzilla-noreply at freebsd.org>


> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=187594
>
> --- Comment #25 from fullermd at over-yonder.net ---
> Having run it for a few months on a number of boxes now, my general 
> impression
> is that it seems like it goes a little _too_ far (with default options 
> anyway;
> I haven't tried any tuning) toward making the ARC give up its lunch 
> money to
> anybody who looks threateningly at it.  It feels like it should be a 
> bit more
> aggressive, and historically was and did fine.
>
> However, it's still _much_ nicer than the unpatched case, where the 
> rest of the
> system starves and hides out in the swap space.  So from here, while 
> perhaps
> imperfect and in need of some tuning work, it's still a significant 
> improvement
> on the prior state, so landing it sounds just fine to me.

The attached updated patch, which has been cleaned up and hammered hard 
at
the event here I'll look to commit to head soon if there are no 
objections.

    Regards
    Steve 
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