Unlocking tables if thread is lost

Question

http://dev.mysql.com/doc/refman/5.0/en/internal-locking.html

The following is the extract from the documentation.

mysql> LOCK TABLES real_table WR         


        

Answer 1

how will I know that some tables are locked?

You can use SHOW OPEN TABLES command to view locked tables.

how do I unlock tables manually?

If you know the session ID that locked tables - 'SELECT CONNECTION_ID()', then you can run KILL command to terminate session and unlock tables.