Date: Wed, 13 Aug 2014 11:13:37 -0500 From: Alan Cox <alan.l.cox@gmail.com> To: "Polyack, Steve" <Steve.Polyack@intermedix.com> Cc: Kurt Jaeger <lists@opsec.eu>, "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org> Subject: Re: vmdaemon CPU usage and poor performance in 10.0-RELEASE Message-ID: <CAJUyCcNoTJ3xqkC_Prz3N%2BApEqYy3Mi2gA%2BuDo33dczaTMONrA@mail.gmail.com> In-Reply-To: <4D557EC7CC2A544AA7C1A3B9CBA2B36726098847AF@exchange03.epbs.com> References: <4D557EC7CC2A544AA7C1A3B9CBA2B36726098846B4@exchange03.epbs.com> <20140813152522.GI9400@home.opsec.eu> <4D557EC7CC2A544AA7C1A3B9CBA2B36726098847AF@exchange03.epbs.com>
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On Wed, Aug 13, 2014 at 10:42 AM, Polyack, Steve < Steve.Polyack@intermedix.com> wrote: > > > -----Original Message----- > > From: Kurt Jaeger [mailto:lists@opsec.eu] > > Sent: Wednesday, August 13, 2014 11:25 AM > > > > Hi! > > > > > We have a handful of database servers running FreeBSD 10.0-RELEASE > > > and PostgreSQL 9.3.4. The servers have 128GB or 256GB of RAM. > > > > Are you aware of the recent work on that topic ? > > > > https://www.freebsd.org/news/status/report-2014-04-2014- > > 06.html#PostgreSQL-Performance-Improvements > > > > Maybe kib@ knows more about this ? > > > > I've recently read over this and some other posts, but they all seem to > center around poor postgres performance. In our case at least, some light > to medium usage of postgres generally makes the entire system unusable. > > The patches & documents linked there also all seem to be for -CURRENT, > which we aren't running. We're not too keen on the idea of using CURRENT > in production, either. We're planning on testing 10-STABLE, but I was just > hoping to gain some insight into what the problem may be and whether recent > commits to vmdaemon code in the -STABLE tree may have a positive effect on > what we've seen. > > There is a good chance that your problem is fixed by r265945.
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