Tuesday Dec 15, 2009

dbhang v3 on 32bit 7.x

If you get "SUNWmessaging-server-64 was not found"... [Read More]

Wednesday Sep 09, 2009

about running dbhang v2.10 on iMS 5.2

Before you run v2.10 on an iMS 5.2 system, you will probably need to edit the dbhang script.  [Read More]

Wednesday Aug 26, 2009

dbhang GDD video on slx

The promised dbhang video is now on SLX. Contrary to the intro, it is not exactly brief (24 minutes).  The overview and example of running it is not too bad.  Then I ramble into stuff I do with the data.  Enjoy...

Friday Aug 21, 2009

dbhang introduction

I finally succumbed to the peer pressure.  So now we have a blog about dbhang.

You can get the current version of the dbhang tarball from the GDD site.

You may also find a recent version in /opt/sun/comms/messaging64/examples/unsupported on your system.

dbhang is a troubleshooting data collection script for use with Sun's Messaging Server product.  The name comes from the fact that the original intent, long ago, was to gather data specifically about problems where something is "hanging" because of a lock in the message store database.  It has long since grown to gather, among other things:

  • a smattering of current system performance type information
  • process stack trace of all (most) Messaging Server processes
  • commonly needed configuration information
  • some logs

There are command line switches or options you can edit in the script to gather other things, but the defaults is usually the best place to start. 

I do not want to encourage people to try to just collect data without understanding what data will really be useful.  But if you have no idea where to start, at least some of the info collected by dbhang should be useful when you open a support case.

The tar ball on the GDD site contians v2.10 for use on iMS 5.2 systems and the current version for use on Messaging Server 6.x and 7 systems.  It also contains examples of how you could use a wrapper around msprobe to make it invoke dbhang automatically if it detects a hang problem, before it initiates a restart.

I am interested in any comments about how to use dbhang, ideas about improving it, or discussion of how to interpret the data.  But we should defer discussion of specific problems to the developer forum, info-ims mailing list, or the official support mechanisms.

Enjoy!

About

dbhang is a troubleshooting data collection script for Sun's Messaging Server product. Kelly Caudill has been supporting Messaging Server (and its predecessor, SIMS) for over 15 years, started with Sun in 1994, and move with Sun to Oracle in 2010.

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