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https://dev.mysql.com/doc/refman/5.7/en/performance-schema-table-handles-table.html
It is autosized by default; to configure the table size, set the performance_schema_max_table_handles system variable at server startup. The Performance Schema exposes table lock information through the table_handles table to show the table locks ...Table lock instrumentation uses the wait/lock/table/sql/handler instrument, which is enabled by ...
https://dev.mysql.com/doc/refman/5.7/en/pluggable-storage-overview.html
The MySQL pluggable storage engine architecture enables a database professional to select a specialized storage engine for a particular application need while being completely shielded from the need to manage any specific application coding ...The ...The MySQL server architecture isolates the application programmer and DBA from all of the low-level implementation details at the storage level, providing a consistent and easy application model and ...
https://dev.mysql.com/doc/refman/5.7/en/functions.html
Rather than showing examples in this format: mysql> SELECT MOD(29,9); +-----------+ | mod(29,9) | +-----------+ | 2 | +-----------+ 1 rows in set (0.00 sec) This format is used instead: mysql> SELECT MOD(29,9); -> 2 . Expressions can be used at ...
https://dev.mysql.com/doc/refman/5.7/en/option-modifiers.html
The --maximum prefix is available for mysqld only and permits a limit to be placed on how large client programs can set session system variables. For example, with --maximum-back_log=200, the server produces this error: Maximum value of 'back_log' ...For example, the mysql client supports a --column-names option that determines whether or not to display a row of column names at the beginning of query ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-limitations-locking.html
For example, a SELECT from a partitioned MyISAM table locks only those partitions actually containing rows that satisfy the SELECT statement's WHERE condition are locked. For statements affecting partitioned tables using storage engines such as ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-stages-history-table.html
To set the number of rows per thread explicitly, set the performance_schema_events_stages_history_size system variable at server startup. When the table contains the maximum number of rows for a given thread, the oldest thread row is discarded when ... The events_stages_history table contains the N most recent stage events that have ended per ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-statements-history-table.html
To set the number of rows per thread explicitly, set the performance_schema_events_statements_history_size system variable at server startup. When the table contains the maximum number of rows for a given thread, the oldest thread row is discarded ... The events_statements_history table contains the N most recent statement events that have ended per ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-transactions-history-table.html
To set the number of rows per thread explicitly, set the performance_schema_events_transactions_history_size system variable at server startup. When the table contains the maximum number of rows for a given thread, the oldest thread row is discarded ... The events_transactions_history table contains the N most recent transaction events that have ended per ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-events-waits-history-table.html
To set the number of rows per thread explicitly, set the performance_schema_events_waits_history_size system variable at server startup. When the table contains the maximum number of rows for a given thread, the oldest thread row is discarded when a ... The events_waits_history table contains the N most recent wait events that have ended per ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-limitations-multiple-nodes.html
(See next item for an example.) Implementing table locks in NDBCLUSTER can be done in an API application, and ensuring that all applications start by setting LockMode to LM_Read or LM_Exclusive. A LOCK TABLES statement or GET_LOCK() call works only ...The following are issues relating to the use of multiple MySQL servers as NDB Cluster SQL nodes, and are specific to the NDBCLUSTER storage engine: Stored programs not ...