Comments on: 11.2.0.2 performance stories

By: doctorrr

doctorrr — Tue, 18 Jun 2013 17:42:56 +0000

Everythink for doctors here http://solomedicine.ru

By: Amit

Amit — Mon, 23 Jul 2012 06:33:40 +0000

Really its a great article… Thaxs Sir for this information

By: Harmandeep Singh

Harmandeep Singh — Mon, 21 Nov 2011 18:33:35 +0000

Brilliant Post. I was looking for something like this.

Kind Regards,
Harman

By: fred

fred — Fri, 29 Jul 2011 18:15:49 +0000

Thank you sir, you just saved me a large headache.

By: Raja Shahnawaz Soni

Raja Shahnawaz Soni — Wed, 01 Jun 2011 06:53:48 +0000

Hello Coskan,
Thanks for this post, it turns out to be a useful one since we are planning to upgrade to 11.2.0.2 version sometime next month.

We are using Oracle 10.2.0.4 at the moment and work on Oracle APEX applications. Does this in any way have an impact on this kind of a setup i.e. ORACLE APEX + ORACLE DB (Please note that we wont be upgrading Oracle APEX, it will be version 3.2 only)

And the above bug, is it generic? Has Oracle identified this and patched it up ?

By: Plan Stability Through Upgrade-Why is my plan changed?-bugfixes-1 « Coskan’s Approach to Oracle

Mon, 14 Feb 2011 12:00:27 +0000

[...] I want to share another example with the bugfix I mentioned in this post. [...]

By: ittichai chammavanijakul

ittichai chammavanijakul — Fri, 28 Jan 2011 22:31:45 +0000

Coskan,

Perfect timing. This is valuable information as we plan to upgrade to 11.2.0.2 next month. It’s good to know that there is a patch available already.

Ittichai

By: Coskan Gundogar

Coskan Gundogar — Fri, 28 Jan 2011 21:35:55 +0000

Hi there,

glad that you liked the post because more are on their way.

For your question for spesific plan_hash_value I use below. you can chance ADVANCED to BASIC
SELECT * FROM table(DBMS_XPLAN.DISPLAY_AWR((‘&sql_id’),&plan_hash,null,’ADVANCED’));

for seeing all historic plans at one time I use this one which has truncated info for execution plan

SELECT * FROM table(DBMS_XPLAN.DISPLAY_AWR((‘&sql_id’),null,null,’TYPICAL PROJECTION’));

Basically your package is DBMS_XPLAN.DISPLAY_AWR

By: Giridhar

Giridhar — Fri, 28 Jan 2011 21:27:05 +0000

This is a very helpful article for everyone who wants to troubleshoot performance issues.

I have a question:

You mentioned that you used a script to find out changes in execution plan by using Kerry’s script. I downloaded the script and executed.

With that script, we know when the PLAN_HASH_VALUE is changed for a given SQL_ID. But how can we know the execution plan for these two different plan hash values?

Thank You
Giridhar

By: ghassem

ghassem — Fri, 28 Jan 2011 20:15:15 +0000

Great Post Coskan.Thank you for sharing