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The First execution of the query is taking significant time on 11g after upgrading from 10g, on 10g

edited Dec 30, 2013 1:33AM in SQL Performance (MOSC) 12 commentsAnswered
We have taken reading of first 10 execution of a database that was on 10g and then taken same reading first 10 execution on 11g after upgrade.

Could you please let me know Why On 11g
The First execution of the query is taking significant time.

Why query execution is fast in Second and third execution and so on...

This was not the case with 10g.

Settings on 11g as:-

optimizer_features_enable 2 11.2.0.3
optimizer_mode 2 ALL_ROWS
optimizer_index_cost_adj 3 50
optimizer_index_caching 3 50
optimizer_dynamic_sampling 3 2
optimizer_secure_view_merging 1 FALSE
optimizer_use_pending_statistics 1 FALSE
optimizer_capture_sql_plan_baselines 1 TRUE

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