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MySQL 8.0 Reference Manual  /  ...  /  The innodb_lock_waits and x$innodb_lock_waits Views

27.4.3.9 The innodb_lock_waits and x$innodb_lock_waits Views

These views summarize the InnoDB locks that transactions are waiting for. By default, rows are sorted by descending lock age.

The innodb_lock_waits and x$innodb_lock_waits views have these columns:

  • wait_started

    The time at which the lock wait started.

  • wait_age

    How long the lock has been waited for, as a TIME value.

  • wait_age_secs

    How long the lock has been waited for, in seconds.

  • locked_table_schema

    The schema that contains the locked table.

  • locked_table_name

    The name of the locked table.

  • locked_table_partition

    The name of the locked partition, if any; NULL otherwise.

  • locked_table_subpartition

    The name of the locked subpartition, if any; NULL otherwise.

  • locked_index

    The name of the locked index.

  • locked_type

    The type of the waiting lock.

  • waiting_trx_id

    The ID of the waiting transaction.

  • waiting_trx_started

    The time at which the waiting transaction started.

  • waiting_trx_age

    How long the waiting transaction has been waiting, as a TIME value.

  • waiting_trx_rows_locked

    The number of rows locked by the waiting transaction.

  • waiting_trx_rows_modified

    The number of rows modified by the waiting transaction.

  • waiting_pid

    The processlist ID of the waiting transaction.

  • waiting_query

    The statement that is waiting for the lock.

  • waiting_lock_id

    The ID of the waiting lock.

  • waiting_lock_mode

    The mode of the waiting lock.

  • blocking_trx_id

    The ID of the transaction that is blocking the waiting lock.

  • blocking_pid

    The processlist ID of the blocking transaction.

  • blocking_query

    The statement the blocking transaction is executing. This field reports NULL if the session that issued the blocking query becomes idle. For more information, see Identifying a Blocking Query After the Issuing Session Becomes Idle.

  • blocking_lock_id

    The ID of the lock that is blocking the waiting lock.

  • blocking_lock_mode

    The mode of the lock that is blocking the waiting lock.

  • blocking_trx_started

    The time at which the blocking transaction started.

  • blocking_trx_age

    How long the blocking transaction has been executing, as a TIME value.

  • blocking_trx_rows_locked

    The number of rows locked by the blocking transaction.

  • blocking_trx_rows_modified

    The number of rows modified by the blocking transaction.

  • sql_kill_blocking_query

    The KILL statement to execute to kill the blocking statement.

  • sql_kill_blocking_connection

    The KILL statement to execute to kill the session running the blocking statement.


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