Postgresql locks up server - no response at all
freebsd at jdc.parodius.com
Wed Aug 4 14:22:07 PDT 2004
Revision 1.72 / (download) - annotate - [select for diffs], Sun Aug 1 14:31:45 2004 UTC (3 days, 6 hours ago) by scottl
$ uname -a
FreeBSD medusa.parodius.com 5.2-CURRENT FreeBSD 5.2-CURRENT #0: Sun Aug 1 07:22:27 PDT 2004 root at medusa.parodius.com:/usr/obj/usr/src/sys/MEDUSA i386
Missed it by 7 hours. :-)
I'll give things a shot with a newer src-all and world.
| Jeremy Chadwick jdc at parodius.com |
| Parodius Networking http://www.parodius.com/ |
| UNIX Systems Administrator Mountain View, CA, USA |
| Making life hard for others since 1977. |
On Wed, Aug 04, 2004 at 04:19:20PM -0500, Jon Noack wrote:
> On 08/04/04 15:34, Jeremy Chadwick wrote:
> >I've seen this with our SuperMicro SuperServer 5013C-T, running mysqld.
> >Please note that the server is "heavily loaded" (note the quotes); usually
> >a load of around 0.50 to 1.00 at all times, with mysqld being the top
> >process. Server runs all latest -CURRENT builds.
> >Many people over in freebsd-threads mentioned this problem, and recommended
> >all sorts-of different workarounds. I tried every one available to me,
> >except mucking with PREEMPTION (as I did not feel comfortable tinkering
> >with a random .h file on the box; seemed to be a kernel-related thing,
> >so I'd rather have just an "options" line for it -- I'm conditionally
> The one you didn't try most likely was the culprit. Robert Watson
> showed that PREEMPTION and threading don't play well together right now:
> The thought is that PREEMPTION uncovers scheduler bugs, but nobody's
> figured it out at the moment.
> >Wed Aug 4 13:28:35 PDT 2004
> >* -CURRENT box is still alive and well.
> PREEMPTION was turned off on August 1st, so if you've updated since then
> things should have stabilized a bit:
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