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The original was posted on /r/mysql by /u/Dull-String945 on 2023-08-05 16:51:55+00:00.

On a production server and a heavily queried database I had to terminate the process doing a rebuild on a clustered index for a big table and now the transaction rollback is in progress but does not seem to end.

IS there a way to find out what is holding the rollback operation? or to find out how long it takes to complete the rollback operation? Please advise.