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Re: Mysql service hangs on ALTER TABLE only on one particular database
Posted by: Rick James
Date: October 24, 2015 08:29PM

What did SHOW PROCESSLIST say when the problem occurred?
Did you try killing the processid (inside mysql) that was running the ALTER?

It may have been that some SELECT was hanging onto that table, preventing the ALTER from starting.

Copying the directory over, etc, is not advisable.

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