From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
---|---|
To: | Stephen Frost <sfrost(at)snowman(dot)net> |
Cc: | Alfred Perlstein <alfred(at)freebsd(dot)org>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Perfomance degradation 9.3 (vs 9.2) for FreeBSD |
Date: | 2014-04-21 19:50:59 |
Message-ID: | 20140421195059.GC13906@alap3.anarazel.de |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
On 2014-04-21 15:47:31 -0400, Stephen Frost wrote:
> That's certainly unfortunate. For my 2c, I'd recommend that you write a
> minimal implementation that allows you to test just the sysv-vs-mmap
> case (which could certainly take an option, to avoid having to
> recompile during testing), or even ask if anyone here already has;
I don't think that's something all that easily testable in
isolation. The behaviour here is heavily related to concurrency.
> I
> wouldn't be at all surprised if both Robert and Francois did exactly
> that already, nor would I be surprised if someone volunteered to write
> such a small C utility for you, if it meant that this issue would be
> fixed in FreeBSD that much sooner.
I don't know, but the patch for a guc would be < 10 lines. I think I'd
start with that.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
From | Date | Subject | |
---|---|---|---|
Next Message | Stephen Frost | 2014-04-21 19:56:15 | Re: Perfomance degradation 9.3 (vs 9.2) for FreeBSD |
Previous Message | Stephen Frost | 2014-04-21 19:47:31 | Re: Perfomance degradation 9.3 (vs 9.2) for FreeBSD |