Date: Mon, 18 Aug 2014 16:29:21 -0500 From: "Polyack, Steve" <Steve.Polyack@intermedix.com> To: Alan Cox <alc@rice.edu>, "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org> Subject: RE: vmdaemon CPU usage and poor performance in 10.0-RELEASE Message-ID: <4D557EC7CC2A544AA7C1A3B9CBA2B3672609BBA64F@exchange03.epbs.com> In-Reply-To: <53F24E5B.1010809@rice.edu> References: <4D557EC7CC2A544AA7C1A3B9CBA2B36726098846B4@exchange03.epbs.com> <20140813152522.GI9400@home.opsec.eu> <4D557EC7CC2A544AA7C1A3B9CBA2B36726098847AF@exchange03.epbs.com> <CAJUyCcNoTJ3xqkC_Prz3N%2BApEqYy3Mi2gA%2BuDo33dczaTMONrA@mail.gmail.com> <4D557EC7CC2A544AA7C1A3B9CBA2B3672609BBA3C4@exchange03.epbs.com> <53F24E5B.1010809@rice.edu>
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> -----Original Message----- > From: owner-freebsd-stable@freebsd.org [mailto:owner-freebsd- > stable@freebsd.org] On Behalf Of Alan Cox > Sent: Monday, August 18, 2014 3:05 PM > To: freebsd-stable@freebsd.org > Subject: Re: vmdaemon CPU usage and poor performance in 10.0-RELEASE >=20 > On 08/18/2014 13:42, Polyack, Steve wrote: > > Excuse my poorly formatted reply at the moment, but this seems to have > fixed our problems. I'm going to update the bug report with a note. > > > > Thanks Alan! >=20 > You're welcome. And, thanks for letting me know of the outcome. >=20 Actually, I may have spoken too soon, as it looks like we're seeing vmdaemo= n tying up the system again: root 6 100.0 0.0 0 16 - DL Wed04PM 4= :37.95 [vmdaemon] Is there anything I can check to help narrow down what may be the problem? = KTrace/truss on the "process" doesn't give any information, I suppose beca= use it's actually a kernel thread. For the "patch" we simply stole vm_pageout.c from r265945. Steve > >> -----Original Message----- > >> From: owner-freebsd-stable@freebsd.org [mailto:owner-freebsd- > >> stable@freebsd.org] On Behalf Of Alan Cox > >> Sent: Wednesday, August 13, 2014 12:14 PM > >> To: Polyack, Steve > >> Cc: Kurt Jaeger; freebsd-stable@freebsd.org > >> Subject: Re: vmdaemon CPU usage and poor performance in 10.0-RELEASE > >> > >> 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 wa= s > 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. > >> _______________________________________________ > >> freebsd-stable@freebsd.org mailing list > >> http://lists.freebsd.org/mailman/listinfo/freebsd-stable > >> To unsubscribe, send any mail to "freebsd-stable- > >> unsubscribe@freebsd.org" > > _______________________________________________ > > freebsd-stable@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > > To unsubscribe, send any mail to "freebsd-stable- > unsubscribe@freebsd.org" > > >=20 > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable- > unsubscribe@freebsd.org"
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