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Database Administration (MOSC)

Find session holding my UNDO

Apr 16, 2018 8:56AM edited Apr 23, 2018 9:21AM in Database Administration (MOSC) 13 commentsAnswered ✓

We have a RAC database 11.2.0.4.

Recently I noticed my UNDO tablespace getting bigger and bigger on node2. I gave it files up to 400GB. Now it is still full.

How do I find the session who has the most UNDO to see how to fix this?

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