Comments on: Advanced Oracle Troubleshooting @OOW 2008 presentation slides and scripts

By: cam

cam — Thu, 12 Jan 2012 12:32:25 +0000

Oops – ignore me. I just found this article which mentions broken links:

http://blog.tanelpoder.com/2011/04/15/new-scripts-tools-and-broken-links/

By: cam

cam — Thu, 12 Jan 2012 12:26:36 +0000

Hi Tanel,

Thanks for your many excellent resources…

As Magesh says, the PerfSheet.zip link is 404′ing.

Thanks,
cam

By: Magesh

Magesh — Fri, 16 Dec 2011 17:29:09 +0000

Hi Tanel

I could not save any of your scripts. It throws “Welcome to the 404 error page!
” Please suggest

Thanks

Magesh

By: Tanel Poder

Tanel Poder — Wed, 24 Dec 2008 05:44:36 +0000

@Austen

Yes, the right troubleshooting approach is identifying the session(s) of the problem end user, as the end user can experience a database problem only through a session. Thus the session level instrumentation is the perfect starting point. Otherwise you might end up troubleshooting the wrong thing…

Its usually easy to identify regular long running batch job sessions as usually these sessions are alive for long time and serve only that batch job.

The hardest part is identifying single problem user requests coming through a connection pool (black box) where there *is no instrumentation* by application itself. Since 10g Oracle has the infrastructure though for gathering end user stats, the application needs to bundle end users CLIENT_IDENTIFIER with any command it sends to database and then with help of DBMS_MONITOR+V$CLIENT_STATS or DBMS_MONITOR.CLIENT_ID_TRACE_ENABLE one can measure/trace only specific end user, no matter through which session/connection it uses.

@Betty

Thanks!!

By: Betty

Betty — Tue, 23 Dec 2008 13:31:53 +0000

wrong email address in my previous comments. gmail one is correct.

Again, Thanks a lot for your sharing…

By: Betty

Betty — Tue, 23 Dec 2008 13:30:26 +0000

Your training session in China made me know that I can do my work more efficient and think things in a different way, Thanks for you did for inspiring me a lot!!!

By: Austen Birchall

Austen Birchall — Tue, 09 Dec 2008 10:43:27 +0000

Hi Tanel

I attended your version of what I assume is the same presentation at the UKOUG (this one was on a Friday afternoon! )- defintely lots to further investigate/think about.

To me it seems that your whole approach depends on ‘identifying the problem session’. Do you have any further insights into how to do this in a long running batch job type (as opposed to a OLTP) environment?

Thanks

Austen

By: Jerry

Jerry — Fri, 26 Sep 2008 13:48:52 +0000

Tanel – I didn’t get to attend OOW (maybe one of these years!), but wanted to thank you for posting your slides. Thanks also for posting/blogging all of your very cool work here, I really appreciate it!

Jerry

By: tanelp

tanelp — Fri, 26 Sep 2008 07:33:13 +0000

Thanks Rob!

I wish I had 2 (or 3) times more time to explain stuff there :)

By: Rob van Wijk

Rob van Wijk — Fri, 26 Sep 2008 01:36:24 +0000

Thanks to you, Tanel. It was the best session I attended this OOW.