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https://dev.mysql.com/doc/refman/9.7/en/sys-ps-trace-thread.html
Dumps all Performance Schema data for an instrumented thread to a .dot formatted graph file (for the DOT graph description language). Each result set returned from the procedure should be used for a complete graph. This procedure disables binary ...
https://dev.mysql.com/doc/refman/9.7/en/using-innodb-tables.html
InnoDB tables are created using the CREATE TABLE statement; for example: CREATE TABLE t1 (a INT, b CHAR (20), PRIMARY KEY (a)) ENGINE=InnoDB; The ENGINE=InnoDB clause is not required when InnoDB is defined as the default storage engine, which it is ...
https://dev.mysql.com/doc/refman/9.7/en/analyze-table.html
ANALYZE [NO_WRITE_TO_BINLOG | LOCAL] TABLE tbl_name UPDATE HISTOGRAM ON col_name [, col_name] ... [WITH N BUCKETS] [{MANUAL | AUTO} UPDATE] ANALYZE [NO_WRITE_TO_BINLOG | LOCAL] TABLE tbl_name UPDATE HISTOGRAM ON col_name [USING DATA 'json_data'] ...
https://dev.mysql.com/doc/refman/9.7/en/atomic-ddl.html
An atomic DDL statement combines the data dictionary updates, storage engine operations, and binary log writes associated with a DDL operation into a single, atomic operation. The operation is either committed, with applicable changes persisted to ...
https://dev.mysql.com/doc/refman/9.7/en/audit-api-message-emit.html
The audit_api_message_emit component enables applications to add their own message events to the audit log, using the audit_api_message_emit_udf() function. For concreteness, examples use the audit_log plugin described in Section 8.4.6, “MySQL ...
https://dev.mysql.com/doc/refman/9.7/en/bnl-bka-optimization.html
In MySQL, a Batched Key Access (BKA) Join algorithm is available that uses both index access to the joined table and a join buffer. The BKA algorithm supports inner join, outer join, and semijoin operations, including nested outer joins. Benefits ...
https://dev.mysql.com/doc/refman/9.7/en/charset-collation-coercibility.html
In the great majority of statements, it is obvious what collation MySQL uses to resolve a comparison operation. For example, in the following cases, it should be clear that the collation is the collation of column x: SELECT x FROM T ORDER BY x; ...
https://dev.mysql.com/doc/refman/9.7/en/checksum-table.html
[QUICK | EXTENDED] CHECKSUM TABLE reports a checksum for the contents of a table. You can use this statement to verify that the contents are the same before and after a backup, rollback, or other operation that is intended to put the data back to a ...
https://dev.mysql.com/doc/refman/9.7/en/converting-tables-to-innodb.html
If you have MyISAM tables that you want to convert to InnoDB for better reliability and scalability, review the following guidelines and tips before converting. Note Partitioned MyISAM tables created in previous versions of MySQL are not compatible ...
https://dev.mysql.com/doc/refman/9.7/en/descending-indexes.html
MySQL supports descending indexes: DESC in an index definition is no longer ignored but causes storage of key values in descending order. Previously, indexes could be scanned in reverse order but at a performance penalty. A descending index can be ...