rwlock_instances

Overview

A description for this Performance-schema Table has not yet been added to this Documentation.

See also: Performance Schema in 10.6 ES, in 10.5 ES, and in 10.4 ES

DETAILS

SCHEMA

CREATE TABLE `rwlock_instances` (
  `NAME` varchar(128) NOT NULL COMMENT 'Instrument name associated with the read write lock',
  `OBJECT_INSTANCE_BEGIN` bigint(20) unsigned NOT NULL COMMENT 'Address in memory of the instrumented lock',
  `WRITE_LOCKED_BY_THREAD_ID` bigint(20) unsigned DEFAULT NULL COMMENT 'THREAD_ID of the locking thread if locked in write (exclusive) mode, otherwise NULL.',
  `READ_LOCKED_BY_COUNT` int(10) unsigned NOT NULL COMMENT 'Count of current read locks held'
)

CHANGE HISTORY

Release Series

History

10.6 Enterprise

  • Present starting in MariaDB Enterprise Server 10.6.4-1.

  • Schema changed in MariaDB Enterprise Server 10.6.5-2: ...

10.5 Enterprise

  • Present starting in MariaDB Enterprise Server 10.5.3-1.

  • Schema changed in MariaDB Enterprise Server 10.5.13-9: ...

10.4 Enterprise

  • Present starting in MariaDB Enterprise Server 10.4.6-1.

  • Schema changed in MariaDB Community Server 10.4.22-14: ...

EXTERNAL REFERENCES