Comments on: Plan stability through Upgrade to 11G-Why is my plan changed?-Auto Adjusted Dynamic Sampling http://coskan.wordpress.com/2012/05/31/plan-stability-through-upgrade-to-11g-why-is-my-plan-changed-auto-adjusted-dynamic-sampling/ What I learned about Oracle Wed, 19 Jun 2013 19:26:25 +0000 hourly 1 http://wordpress.com/ By: Dynamic Sampling: Use,Levels,10g-11g behavior, « SureshGandhi http://coskan.wordpress.com/2012/05/31/plan-stability-through-upgrade-to-11g-why-is-my-plan-changed-auto-adjusted-dynamic-sampling/#comment-7315 Sun, 07 Oct 2012 07:32:00 +0000 http://coskan.wordpress.com/?p=1191#comment-7315 [...] Permalink to Plan stability through Upgrade to 11G-Why is my plan changed–Auto Adjusted Dynami… [...]

]]> By: coskan http://coskan.wordpress.com/2012/05/31/plan-stability-through-upgrade-to-11g-why-is-my-plan-changed-auto-adjusted-dynamic-sampling/#comment-6500 Thu, 31 May 2012 20:40:33 +0000 http://coskan.wordpress.com/?p=1191#comment-6500 This is what I like about you Dom, you are certainly a better blog follower then me.
I wonder how I missed Randolfs mention, I wish I can do more scientific analysis like he did instead of trivial ones :) I also wish Oracle gives more info about the feature and when it kicks. They never mentioned default level in the docs or notes (maybe I’m missing ) thankfully community has got great brains to confirm my trivial approach :)

Thank you very much for the comment it made the blog complete.

]]> By: Dom Brooks http://coskan.wordpress.com/2012/05/31/plan-stability-through-upgrade-to-11g-why-is-my-plan-changed-auto-adjusted-dynamic-sampling/#comment-6499 Thu, 31 May 2012 20:23:04 +0000 http://coskan.wordpress.com/?p=1191#comment-6499 This is correct – auto adjustment only happens when dynamic sampling is at default level 2.

Randolf Geist touches on it here:
http://allthingsoracle.com/dynamic-sampling-ii-controlling-the-activity-part-2/

Also Jean Pierre-Dijcks here:
https://blogs.oracle.com/datawarehousing/entry/explaining_explain_plan_notes

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