Waiting For Table Metadata Lock

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Waiting For Table Metadata Lock. The process holding the lock will still hold the lock and the next thread trying to do something will therefore also stall and enter Waiting for metadata lock in due order. I use the elements in the xml to create columns in the table like this.

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Application programmers should try to familiarize themselves with the changes in the product. How could it be. The similar problem happens with drop table also.

Determine which thread has been waiting for it the longest.

Add a common index directly to a table in the database through the sqlyog tool. 1398 is the connection waiting for the lock. Alter Table on very active table gives Waiting for table metadata lock. We are having issues with metadata locks with the DB so performance continue to be an issue here.