Documentation Home
MySQL 5.7 Reference Manual
Related Documentation Download this Manual
PDF (US Ltr) - 37.2Mb
PDF (A4) - 37.2Mb
PDF (RPM) - 36.6Mb
HTML Download (TGZ) - 10.1Mb
HTML Download (Zip) - 10.2Mb
HTML Download (RPM) - 8.8Mb
Man Pages (TGZ) - 206.0Kb
Man Pages (Zip) - 313.0Kb
Info (Gzip) - 3.4Mb
Info (Zip) - 3.4Mb
Excerpts from this Manual

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

23.31.14 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 is removed in MySQL 8.0.

Table 23.14 INNODB_LOCK_WAITS Columns

Column nameDescription
REQUESTING_TRX_IDID of the requesting (blocked) transaction.
REQUESTED_LOCK_IDID of the lock for which a transaction is waiting. To obtain details about the lock, join this column with the LOCK_ID column of the INNODB_LOCKS table.
BLOCKING_TRX_IDID of the blocking transaction.
BLOCKING_LOCK_IDID of a lock held by a transaction blocking another transaction from proceeding. To obtain details about the lock, join this column with the LOCK_ID column of the INNODB_LOCKS table.

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

Notes:


User Comments
Sign Up Login You must be logged in to post a comment.