Information Schema INNODB_LOCK_WAITS Table

The Information Schema INNODB_LOCK_WAITS table contains information about blocked InnoDB transactions. The PROCESS privilege is required to view the table.

It contains the following columns:

REQUESTING_TRX_IDRequesting transaction ID from the INNODB_TRX table.
REQUESTED_LOCK_IDLock ID from the INNODB.LOCKS table for the waiting transaction.
BLOCKING_TRX_IDBlocking transaction ID from the INNODB_TRX table.
BLOCKING_LOCK_IDLock ID from the INNODB.LOCKS table of a lock held by a transaction that is blocking another transaction.

The table is often used in conjunction with the INNODB_LOCKS and INNODB_TRX tables to diagnose problematic locks and transactions.


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