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MySQL 5.7 Reference Manual  /  ...  /  The INFORMATION_SCHEMA INNODB_LOCK_WAITS Table

22.31.6 The INFORMATION_SCHEMA INNODB_LOCK_WAITS Table

The INNODB_LOCK_WAITS table contains one or more rows for each blocked InnoDB transaction, indicating the lock it has requested and any locks that are blocking that request.

Note

This table is deprecated as of MySQL 5.7.14 and will be removed in a future MySQL release.

Table 22.6 INNODB_LOCK_WAITS Columns

Column nameDescription
REQUESTING_TRX_IDID of the requesting transaction.
REQUESTED_LOCK_IDID of the lock for which a transaction is waiting. Details about the lock can be found by joining with INNODB_LOCKS on LOCK_ID.
BLOCKING_TRX_IDID of the blocking transaction.
BLOCKING_LOCK_IDID of a lock held by a transaction blocking another transaction from proceeding. Details about the lock can be found by joining with INNODB_LOCKS on LOCK_ID.

Example:

mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_LOCK_WAITS \G
*************************** 1. row ***************************
requesting_trx_id: 3396
requested_lock_id: 3396:91:3:2
  blocking_trx_id: 3395
 blocking_lock_id: 3395:91:3:2
1 row in set (0.00 sec)

Notes:


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