threads

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 `threads` (
  `THREAD_ID` bigint(20) unsigned NOT NULL COMMENT 'A unique thread identifier.',
  `NAME` varchar(128) NOT NULL COMMENT 'Name associated with the server''s thread instrumentation code, for example thread/sql/main for the server''s main() function, and thread/sql/one_connection for a user connection.',
  `TYPE` varchar(10) NOT NULL COMMENT 'FOREGROUND or BACKGROUND, depending on the thread type. User connection threads are FOREGROUND, internal server threads are BACKGROUND.',
  `PROCESSLIST_ID` bigint(20) unsigned DEFAULT NULL COMMENT 'The PROCESSLIST.ID value for threads displayed in the INFORMATION_SCHEMA.PROCESSLIST table, or 0 for background threads. Also corresponds with the CONNECTION_ID() return value for the thread.',
  `PROCESSLIST_USER` varchar(128) DEFAULT NULL COMMENT 'Foreground thread user, or NULL for a background thread.',
  `PROCESSLIST_HOST` varchar(255) DEFAULT NULL COMMENT 'Foreground thread host, or NULL for a background thread.',
  `PROCESSLIST_DB` varchar(64) DEFAULT NULL COMMENT 'Thread''s default database, or NULL if none exists.',
  `PROCESSLIST_COMMAND` varchar(16) DEFAULT NULL COMMENT 'Type of command executed by the thread. These correspond to the the COM_xxx client/server protocol commands, and the Com_xxx status variables. See Thread Command Values.',
  `PROCESSLIST_TIME` bigint(20) DEFAULT NULL COMMENT 'Time in seconds the thread has been in its current state.',
  `PROCESSLIST_STATE` varchar(64) DEFAULT NULL COMMENT 'Action, event or state indicating what the thread is doing.',
  `PROCESSLIST_INFO` longtext DEFAULT NULL COMMENT 'Statement being executed by the thread, or NULL if a statement is not being executed. If a statement results in calling other statements, such as for a stored procedure, the innermost statement from the stored procedure is shown here.',
  `PARENT_THREAD_ID` bigint(20) unsigned DEFAULT NULL COMMENT 'THREAD_ID of the parent thread, if any. Subthreads can for example be spawned as a result of INSERT DELAYED statements.',
  `ROLE` varchar(64) DEFAULT NULL COMMENT 'Unused.',
  `INSTRUMENTED` enum('YES','NO') NOT NULL COMMENT 'YES or NO for Whether the thread is instrumented or not. For foreground threads, the initial value is determined by whether there''s a user/host match in the setup_actors table. Subthreads are again matched, while for background threads, this will be set to YES by default. To monitor events that the thread executes, INSTRUMENTED must be YES and the thread_instrumentation consumer in the setup_consumers table must also be YES.',
  `HISTORY` enum('YES','NO') NOT NULL COMMENT 'Whether to log historical events for the thread.',
  `CONNECTION_TYPE` varchar(16) DEFAULT NULL COMMENT 'The protocol used to establish the connection, or NULL for background threads.',
  `THREAD_OS_ID` bigint(20) unsigned DEFAULT NULL COMMENT 'The thread or task identifier as defined by the underlying operating system, if there is one.'
)

CHANGE HISTORY

Release Series

History

10.6 Enterprise

  • Schema changed in MariaDB Enterprise Server 10.6.4-1: ...

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

10.6 Community

  • Schema changed in MariaDB Community Server 10.6.0: ...

  • Schema changed in MariaDB Community Server 10.6.5: ...

10.5 Enterprise

  • Schema changed in MariaDB Enterprise Server 10.5.3-1: ...

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

10.5 Community

  • Present starting in MariaDB Community Server 10.5.0.

  • Schema changed in MariaDB Community Server 10.5.2: ...

  • Schema changed in MariaDB Community Server 10.5.13: ...

10.4 Enterprise

  • Present starting in MariaDB Enterprise Server 10.4.6-1.

  • Schema changed in MariaDB Community Server 10.4.18-11: ...

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

10.4 Community

  • Present starting in MariaDB Community Server 10.4.0.

  • Schema changed in MariaDB Community Server 10.4.18: ...

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

10.3 Enterprise

  • Present starting in MariaDB Enterprise Server 10.3.16-1.

  • Schema changed in MariaDB Community Server 10.3.28-11: ...

  • Schema changed in MariaDB Community Server 10.3.32-14: ...

10.3 Community

  • Present starting in MariaDB Community Server 10.3.0.

  • Schema changed in MariaDB Community Server 10.3.28: ...

  • Schema changed in MariaDB Community Server 10.3.32: ...

10.2 Enterprise

  • Present starting in MariaDB Enterprise Server 10.2.25-1.

  • Schema changed in MariaDB Community Server 10.2.37-11: ...

  • Schema changed in MariaDB Community Server 10.2.41-14: ...

10.2 Community

  • Present starting in MariaDB Community Server 10.2.0.

  • Schema changed in MariaDB Community Server 10.2.1: ...

  • Schema changed in MariaDB Community Server 10.2.37: ...

  • Schema changed in MariaDB Community Server 10.2.41: ...

EXTERNAL REFERENCES