rwlock_instances
This page is part of MariaDB's Documentation.
The parent of this page is: Performance Schema for MariaDB Enterprise Server
Topics on this page:
Overview
A description for this Performance-schema Table has not yet been added to this Documentation.
USAGE
DETAILS
SYNONYMS
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'
)
PARAMETERS
SKYSQL
PRIVILEGES
EXAMPLES
ERROR HANDLING
FEATURE INTERACTION
RESPONSES
DIAGNOSIS
ISO 9075:2016
CHANGE HISTORY
Release Series | History |
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11.4 Enterprise |
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10.6 Enterprise |
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10.6 Community |
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10.5 Enterprise |
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10.5 Community |
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10.4 Enterprise |
|
10.4 Community |
|
10.3 Enterprise |
|
10.3 Community |
|
10.2 Enterprise |
|
10.2 Community |
|
Release Series | History |
---|---|
11.4 Enterprise |
|
10.6 Enterprise |
|
10.5 Enterprise |
|
10.4 Enterprise |
|
RELATED TOPICS
EXTERNAL REFERENCES
Additional information on this topic may be found in the MariaDB Public Knowledge Base.