Re: d/b health check
- From: Jared.Still@xxxxxxxxxxx
- To: oracle-l@xxxxxxxxxxxxx
- Date: Wed, 25 Aug 2004 09:44:32 -0700
>
> --- "Daniel W. Fink" <Daniel.Fink@xxxxxxx> wrote:
>
> one site had posting routines running for hours,
> frequently hanging - not because they took a long time
> to actually execute, but due to the app code causing a
> series of serializations which were manifested as
> blocked sessions. (users hitting ctrl-alt-del left
> around zombies, which on win32 - PMON is notoriously
> lazy in actually terminating the thread and cleaning
> up the wreckage). I knew nothing about it until I was
> onsite - and a user was testing routines after an
> 8.1.7.4 to 9.2.0.4 migration (on a saturday) - during
> actual acceptance testing. "Oh - these hang all the
> time. we just kill the app and restart it."
> Well, their zombied session (and others) would still
> be sitting there, holding locks, until PMON would get
> motivated. (yes, they should not have been running on
> win32).
>
At one of my previous employers there may still be running
a daemon that does a 'kill -9' on those pesky hung sessions.
PMON sometimes lets them go for days.
Jared
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