Performance Schema events_transactions_history Table

MariaDB starting with 10.5.2

The events_transactions_history table was introduced in MariaDB 10.5.2.

The events_transactions_history table contains the most recent completed transaction events for each thread.

The number of records stored per thread in the table is determined by the performance_schema_events_transactions_history_size system variable, which is autosized on startup.

If adding a completed transaction event would cause the table to exceed this limit, the oldest thread row is discarded.

All of a thread's rows are discarded when the thread ends.

The table contains the following columns:

+---------------------------------+------------------------------------------------+------+-----+---------+-------+
| Field                           | Type                                           | Null | Key | Default | Extra |
+---------------------------------+------------------------------------------------+------+-----+---------+-------+
| THREAD_ID                       | bigint(20) unsigned                            | NO   |     | NULL    |       |
| EVENT_ID                        | bigint(20) unsigned                            | NO   |     | NULL    |       |
| END_EVENT_ID                    | bigint(20) unsigned                            | YES  |     | NULL    |       |
| EVENT_NAME                      | varchar(128)                                   | NO   |     | NULL    |       |
| STATE                           | enum('ACTIVE','COMMITTED','ROLLED BACK')       | YES  |     | NULL    |       |
| TRX_ID                          | bigint(20) unsigned                            | YES  |     | NULL    |       |
| GTID                            | varchar(64)                                    | YES  |     | NULL    |       |
| XID_FORMAT_ID                   | int(11)                                        | YES  |     | NULL    |       |
| XID_GTRID                       | varchar(130)                                   | YES  |     | NULL    |       |
| XID_BQUAL                       | varchar(130)                                   | YES  |     | NULL    |       |
| XA_STATE                        | varchar(64)                                    | YES  |     | NULL    |       |
| SOURCE                          | varchar(64)                                    | YES  |     | NULL    |       |
| TIMER_START                     | bigint(20) unsigned                            | YES  |     | NULL    |       |
| TIMER_END                       | bigint(20) unsigned                            | YES  |     | NULL    |       |
| TIMER_WAIT                      | bigint(20) unsigned                            | YES  |     | NULL    |       |
| ACCESS_MODE                     | enum('READ ONLY','READ WRITE')                 | YES  |     | NULL    |       |
| ISOLATION_LEVEL                 | varchar(64)                                    | YES  |     | NULL    |       |
| AUTOCOMMIT                      | enum('YES','NO')                               | NO   |     | NULL    |       |
| NUMBER_OF_SAVEPOINTS            | bigint(20) unsigned                            | YES  |     | NULL    |       |
| NUMBER_OF_ROLLBACK_TO_SAVEPOINT | bigint(20) unsigned                            | YES  |     | NULL    |       |
| NUMBER_OF_RELEASE_SAVEPOINT     | bigint(20) unsigned                            | YES  |     | NULL    |       |
| OBJECT_INSTANCE_BEGIN           | bigint(20) unsigned                            | YES  |     | NULL    |       |
| NESTING_EVENT_ID                | bigint(20) unsigned                            | YES  |     | NULL    |       |
| NESTING_EVENT_TYPE              | enum('TRANSACTION','STATEMENT','STAGE','WAIT') | YES  |     | NULL    |       |
+---------------------------------+------------------------------------------------+------+-----+---------+-------+

Comments

Comments loading...
Content reproduced on this site is the property of its respective owners, and this content is not reviewed in advance by MariaDB. The views, information and opinions expressed by this content do not necessarily represent those of MariaDB or any other party.