rwlock_instances
This page is part of MariaDB's Enterprise Documentation.
The parent of this page is: Performance Schema
Topics on this page:
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 10.6 CS, in 10.5 ES, in 10.5 CS, in 10.4 ES, in 10.4 CS, in 10.3 ES, in 10.3 CS, in 10.2 ES, and in 10.2 CS
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 |
|
10.6 Community |
|
10.5 Enterprise |
|
10.5 Community |
|
10.4 Enterprise |
|
10.4 Community |
|
10.3 Enterprise |
|
10.3 Community |
|
10.2 Enterprise |
|
10.2 Community |
|
EXTERNAL REFERENCES
Additional information on this topic may be found in the MariaDB Public Knowledge Base.
Information specific to MariaDB SkySQL can be found on the rwlock_instances page in the SkySQL Documentation.