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:
Column | Description |
---|---|
REQUESTING_TRX_ID | Requesting transaction ID from the INNODB_TRX table. |
REQUESTED_LOCK_ID | Lock ID from the INNODB.LOCKS table for the waiting transaction. |
BLOCKING_TRX_ID | Blocking transaction ID from the INNODB_TRX table. |
BLOCKING_LOCK_ID | Lock 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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