Date: Mon, 18 Aug 2014 17:07:08 -0500 From: Alan Cox <alc@rice.edu> To: freebsd-stable@freebsd.org Subject: Re: vmdaemon CPU usage and poor performance in 10.0-RELEASE Message-ID: <53F2790C.20703@rice.edu> In-Reply-To: <4D557EC7CC2A544AA7C1A3B9CBA2B3672609BBA64F@exchange03.epbs.com> 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> <4D557EC7CC2A544AA7C1A3B9CBA2B3672609BBA64F@exchange03.epbs.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 08/18/2014 16:29, Polyack, Steve wrote: >> -----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 >> >> 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! >> You're welcome. And, thanks for letting me know of the outcome. >> > Actually, I may have spoken too soon, as it looks like we're seeing vmdaemon 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 because it's actually a kernel thread. Can you provide the full output of top? Is there anything unusual about the hardware or software configuration? > 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 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. >>>> _______________________________________________ >>>> 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" >> _______________________________________________ >> 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" >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?53F2790C.20703>