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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-statement-summary-tables.html
If no row has the digest value for the statement that just completed, and the table is not full, a new row is created for the statement. If no row has the statement digest value for the statement that just completed, and the table is full, the ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-waits-current-table.html
The table stores one row per thread showing the current status of the thread's most recent monitored wait event, so there is no system variable for configuring the table size. Of the tables that contain wait event rows, events_waits_current is the ...The THREAD_ID and EVENT_ID values taken together uniquely identify the ...
https://dev.mysql.com/doc/refman/8.0/en/table-size-limit.html
If you need a MyISAM table that is larger than the default limit and your operating system supports large files, the CREATE TABLE statement supports AVG_ROW_LENGTH and MAX_ROWS options. The effective maximum table size for MySQL databases is ...For ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-ft-index-table-table.html
The INNODB_FT_INDEX_TABLE table provides information about the inverted index used to process text searches against the FULLTEXT index of an InnoDB table. Before querying it, set the value of the innodb_ft_aux_table system variable to the name ...
https://dev.mysql.com/doc/refman/8.0/en/lateral-derived-tables.html
A derived table cannot normally refer to (depend on) columns of preceding tables in the same FROM clause. As of MySQL 8.0.14, a derived table may be defined as a lateral derived table to specify that such references are permitted. Nonlateral ...
https://dev.mysql.com/doc/refman/8.0/en/myisamchk.html
The myisamchk utility gets information about your database tables or checks, repairs, or optimizes them. myisamchk works with MyISAM tables (tables that have .MYD and .MYI files for storing data and indexes). You can also use the CHECK TABLE and ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-limitations-syntax.html
Trying either to create a temporary table that uses the NDB storage engine or to alter an existing temporary table to use NDB fails with the error Table storage engine 'ndbcluster' does not support the create option 'TEMPORARY'. Attempting to create ... Some SQL statements relating to certain MySQL features produce errors when used with NDB tables, as described in the following list: Temporary ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-error-log-table.html
As of MySQL 8.0.22, depending on error log configuration, the server can also write the most recent error events to the Performance Schema error_log table. Granting the SELECT privilege for the error_log table thus gives clients and applications ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-temp-table-info-table.html
The INNODB_TEMP_TABLE_INFO table provides information about user-created InnoDB temporary tables that are active in an InnoDB instance. The INNODB_TEMP_TABLE_INFO table is created when first queried, exists only in memory, and is not persisted to ...It does not provide information about internal InnoDB temporary tables used by the ...
https://dev.mysql.com/doc/refman/8.0/en/table-locking.html
Workarounds for Locking Performance Issues The following items describe some ways to avoid or reduce contention caused by table locking: Consider switching the table to the InnoDB storage engine, either using CREATE TABLE ... You might have to ...