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IDS 11.10 - 30 Sep 2012
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IDS Forum

Informix 11.10FC2W5 hangs & crashes

Posted By: Tim Ertl
Date: Monday, 29 September 2008, at 6:00 p.m.

We have about 6 or 7 MAJOR failures of Infmormix 11.10FC2W5 in the past
few days. I have a pmr going and a tech support person working on it for
several days now.

I am hoping someone else might have seen this problem and fixed it them
selves. I am all Googled out.

We have had Assertions and HANGS on Blocked Check Points. Sometimes we
can stay up for only 3 hours other times we stay up for a whole day.
This morning alone we Hang at 6am and then again at 9. Now we are quite
till 17:30. We have restricted usage to Medical Emergencies Only to
prevent any unnecessary usage. We move some stuff over to M/S Sql
(something some people around here looked for excuses to do).

We have been running 11.10FC2 since Aug 16th no problems. Then all of a
sudden we have an assertion at 3 oclock last Thursday monring. Since
then we have had about 6/7 Informix Failures.
IBM Support had us upgrade to W5 and since we did that we have had 4
more problems. IBM has added and onmode -C alice 6 for some reason I do
not understand. We can not continue like this.

ALL of these problems start off with about an hour of the informix log
saying Txns blocked:1 and checkpoint durations greater than 0. We used
to have zero all the time for these. During the hour before lock up we
have slow periods of up to 5 minutes then all of a sudden things free up
and we go back to normal, on and off hangs. Then after about an hour of
this the system freezes on blocked check point.

Physical log is at 1% used and there are 7 logical logs and only one is
in use. The others are backed up.

I have tons of onstat -a's. Has anyone had some experience with blocked
check points that might be able to shed some light on this.

Why would informix go belly up all of a sudden like this?

Running on a Sun Sparc T5120 32gb memory, 64 virtual processors (cores
or what ever they call them). Ton's of disk space now. We upgraded Aug
16th and things have been great, then crash!

Thanks for any suggestions.
We may need to hire special help!

,,,Tim

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