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https://dev.mysql.com/doc/refman/8.0/en/information-schema-tp-thread-state-table.html
For example, if an application uses this query: SELECT * FROM INFORMATION_SCHEMA.TP_THREAD_STATE; The application should use this query instead: SELECT * FROM performance_schema.tp_thread_state; The TP_THREAD_STATE table has one row per thread ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-programs-ndb-drop-table.html
Usage ndb_drop_table -c connection_string tbl_name -d db_name Options that can be used with ndb_drop_table are shown in the following table. --database, -d Command-Line Format --database=name Type String Default Value TEST_DB Name of the database in ...--connect-retries Command-Line Format --connect-retries=# Type Integer Default Value 12 Minimum Value 0 Maximum Value 12 Number of times to retry connection before giving ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-mutex-instances-table.html
When some code creates a mutex, a row is added to the mutex_instances table. The mutex_instances table lists all the mutexes seen by the Performance Schema while the server executes. The mutex_instances table has these columns: NAME The instrument ...A mutex is a synchronization mechanism used in the code to enforce that only one thread at a given time can have access to some common ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-tp-thread-group-state-table.html
Note The Performance Schema table described here is available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA table instead; see Section 28.5.2, “The INFORMATION_SCHEMA TP_THREAD_GROUP_STATE Table”. The ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-tp-thread-group-stats-table.html
Note The Performance Schema table described here is available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA table instead; see Section 28.5.3, “The INFORMATION_SCHEMA TP_THREAD_GROUP_STATS Table”. The ...
https://dev.mysql.com/doc/refman/8.0/en/myisam-table-formats.html
The third, compressed format, can be created only with the myisampack utility (see Section 6.6.6, “myisampack — Generate Compressed, Read-Only MyISAM Tables”). When you use CREATE TABLE or ALTER TABLE for a table that has no BLOB or TEXT ...
https://dev.mysql.com/doc/refman/8.0/en/information-functions.html
Beginning with MySQL 8.0.34, this function can be used for the default value of a VARCHAR or TEXT column, as shown in the following CREATE TABLE statement: CREATE TABLE t (c VARCHAR(288) DEFAULT (CURRENT_USER())); DATABASE() Returns the default ...
https://dev.mysql.com/doc/refman/8.0/en/internal-locking.html
This section discusses internal locking; that is, locking performed within the MySQL server itself to manage contention for table contents by multiple sessions. Row-Level Locking Table-Level Locking Choosing the Type of Locking Row-Level Locking ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-system-variables.html
Even when the Performance Schema is disabled, it continues to populate the global_variables, session_variables, global_status, and session_status tables. This occurs as necessary to permit the results for the SHOW VARIABLES and SHOW STATUS ...The ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-tp-thread-group-state-table.html
Note As of MySQL 8.0.14, the thread pool INFORMATION_SCHEMA tables are also available as Performance Schema tables. (See Section 29.12.16, “Performance Schema Thread Pool Tables”.) The INFORMATION_SCHEMA tables are deprecated; expect them to be ...Each row provides information about the current state of a ...