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https://dev.mysql.com/doc/refman/8.0/en/view-syntax.html
The CREATE VIEW statement creates a new view (see Section 15.1.23, “CREATE VIEW Statement”). To alter the definition of a view or drop a view, use ALTER VIEW (see Section 15.1.11, “ALTER VIEW Statement”), or DROP VIEW (see Section 15.1.35, ...
https://dev.mysql.com/doc/refman/8.0/en/scheduler-component.html
Note The scheduler component is included in MySQL Enterprise Edition, a commercial product. As of MySQL 8.0.34, the scheduler component provides an implementation of the mysql_scheduler service that enables applications, components, or plugins to ...For example, the audit_log server plugin calls the scheduler component at its initialization and configures a regular, recurring flush of its memory cache (see Enabling the Audit Log Flush ...
https://dev.mysql.com/doc/refman/8.0/en/optimize-overview.html
As you work on database performance, you start by learning the high-level rules and guidelines for the software side, and measuring performance using wall-clock time. Advanced users look for opportunities to improve the MySQL software itself, or ...
https://dev.mysql.com/doc/refman/8.0/en/sys-statement-analysis.html
total_latency The total wait time of timed occurrences of the statement. max_latency The maximum single wait time of timed occurrences of the statement. avg_latency The average wait time per timed occurrence of the statement. lock_latency The total ...The statement_analysis and x$statement_analysis views have these columns: query The normalized statement ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-trx-table.html
TRX_WAIT_STARTED The time when the transaction started waiting on the lock, if TRX_STATE is LOCK WAIT; otherwise NULL. Whether to relinquish the search latch immediately for the adaptive hash index, or reserve it across calls from MySQL. During ...
https://dev.mysql.com/doc/refman/8.0/en/replication-administration-skip.html
You can use mysqlbinlog to retrieve and display the events that were logged around the time of the error. For instructions to do this, see Section 9.5, “Point-in-Time (Incremental) Recovery”. 19.1.7.3.2 Skipping Transactions Without GTIDs To ...
https://dev.mysql.com/doc/refman/8.0/en/delete.html
To ensure that a given DELETE statement does not take too much time, the MySQL-specific LIMIT row_count clause for DELETE specifies the maximum number of rows to be deleted. The IGNORE modifier causes MySQL to ignore ignorable errors during the ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-processlist-table.html
Important INFORMATION_SCHEMA.PROCESSLIST is deprecated and subject to removal in a future MySQL release. The MySQL process list indicates the operations currently being performed by the set of threads executing within the server. TIME The time in ...As such, the implementation of SHOW PROCESSLIST which uses this table is also ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-deadlocks-handling.html
In particular, do not leave an interactive mysql session open for a long time with an uncommitted transaction. With MySQL table-level locks, the timeout method must be used to resolve deadlocks. You can cope with deadlocks and reduce the likelihood ... This section builds on the conceptual information about deadlocks in Section 17.7.5.2, “Deadlock ...
https://dev.mysql.com/doc/refman/8.0/en/replication-sbr-rbr.html
If there is an error in evaluation on the replica, particularly when executing complex statements, statement-based replication may slowly increase the margin of error across the affected rows over time. As of MySQL 8.0.22, DML operations that read ...For most users, the mixed replication format should provide the best combination of data integrity and ...