innodb_lock_waits and x$innodb_lock_waits Sys Schema Views
MariaDB starting with 10.6
These Sys Schema views were introduced in MariaDB 10.6.
Description
The innodb_lock_waits and x$innodb_lock_waits views summarize InnoDB locks that transactions are waiting upon, by default sorted in descending buffer size.
The innodb_lock_waits view is intended to be easier for human reading, while the x$innodb_lock_waits view provides the data in raw form, intended for tools that process the data.
They contain the following columns:
| Column | Description |
|---|---|
| wait_started | Time that lock wait began. |
| wait_age | TIME value for the length of the lock wait. |
| wait_age_secs | Seconds value for the length of the lock wait. |
| locked_table_schema | Schema containing the locked table. |
| locked_table_name | Name of the locked table. |
| locked_table_partition | Name of the locked partition, or NULL if none. |
| locked_table_subpartition | Name of the locked subpartition, or NULL if none. |
| locked_index | Name of the locked index. |
| locked_type | Type of the waiting lock. |
| waiting_trx_id | ID of the waiting transaction. |
| waiting_trx_started | Time that the waiting transaction started. |
| waiting_trx_age | TIME value for the length of time that the transaction has been waiting. |
| waiting_trx_rows_locked | Number of rows locked by the waiting transaction. |
| waiting_trx_rows_modified | Number of rows modified by the waiting transaction. |
| waiting_pid | Processlist ID of the waiting transaction. |
| waiting_query | Statement waiting for the lock. |
| waiting_lock_id | ID of the waiting lock. |
| waiting_lock_mode | Mode of the waiting lock. |
| blocking_trx_id | ID of the transaction blocking the waiting lock. |
| blocking_pid | Processlist ID of the blocking transaction. |
| blocking_query | Statement the blocking transaction is executing, or NULL if the session that issued the blocking query has become idle. |
| blocking_lock_id | ID of the lock blocking the waiting lock. |
| blocking_lock_mode | Mode of the lock blocking the waiting lock. |
| blocking_trx_started | Time the blocking transaction started. |
| blocking_trx_age | TIME value for how long the blocking transaction has been executing. |
| blocking_trx_rows_locked | Number of rows locked by the blocking transaction. |
| blocking_trx_rows_modified | Number of rows modified by the blocking transaction. |
| sql_kill_blocking_query | KILL statement that could be used to kill the blocking statement. |
| sql_kill_blocking_connection | KILL statement that could be used to kill the blocking statement session. |
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