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Changes between Oracle DB 11g and Oracle 12c optimizer

edited May 18, 2016 5:08AM in SQL Performance (MOSC) 2 commentsAnswered

Hi Experts,

can you please explain what changed between the optimizer of 11g & 12c for oracle database

This is because we are suddenly facing issue with the hints that we had used before upgrading to oracle 12c

The difference between cost with Hints & without hints is huge

The cost of queries is better when we are not using the hints as compared to using the hints

please guide

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