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https://dev.mysql.com/doc/refman/5.7/en/sys-host-summary-by-file-io-type.html
max_latency The maximum single wait time of timed occurrences of the file I/O event for the host. total_latency The total wait time of timed occurrences of the file I/O event for the host. These views summarize file I/O, grouped by host and event ...
https://dev.mysql.com/doc/refman/5.7/en/sys-user-summary-by-file-io-type.html
max_latency The maximum single wait time of timed occurrences of the file I/O event for the user. latency The total wait time of timed occurrences of the file I/O event for the user. These views summarize file I/O, grouped by user and event type.
https://dev.mysql.com/doc/refman/5.7/en/partitioning-linear-hash.html
MySQL also supports linear hashing, which differs from regular hashing in that linear hashing utilizes a linear powers-of-two algorithm whereas regular hashing employs the modulus of the hashing function's value. We call this value V; it can be ...
https://dev.mysql.com/doc/refman/5.7/en/view-check-option.html
The check for v3 fails as before: mysql> INSERT INTO v2 VALUES (2); ERROR 1369 (HY000): CHECK OPTION failed 'test.v2' mysql> INSERT INTO v3 VALUES (2); ERROR 1369 (HY000): CHECK OPTION failed 'test.v3' . The WITH CHECK OPTION clause can be given ...
https://dev.mysql.com/doc/refman/5.7/en/sys-diagnostics.html
Parameters in_max_runtime INT UNSIGNED: The maximum data collection time in seconds. in_interval INT UNSIGNED: The sleep time between data collections in seconds. This procedure disables binary logging during its execution by manipulating the ...
https://dev.mysql.com/doc/refman/5.7/en/load-index.html
tbl_index_list: tbl_name [PARTITION (partition_list)] [{INDEX|KEY} (index_name[, index_name] ...)] [IGNORE LEAVES] partition_list: { partition_name[, partition_name] ... | ALL } The LOAD INDEX INTO CACHE statement preloads a table index into the key ...
https://dev.mysql.com/doc/refman/5.7/en/show-relaylog-events.html
Note Issuing a SHOW RELAYLOG EVENTS with no LIMIT clause could start a very time- and resource-consuming process because the server returns to the client the complete contents of the relay log (including all statements modifying data that have been ... SHOW RELAYLOG EVENTS [IN 'log_name'] [FROM pos] [LIMIT [offset,] row_count] [channel_option] channel_option: FOR CHANNEL channel Shows the events in the relay log of a ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-columns.html
Columns using other data types relating to dates or times are not supported as partitioning columns. The next two sections discuss COLUMNS partitioning, which are variants on RANGE and LIST partitioning. COLUMNS partitioning enables the use of ...
https://dev.mysql.com/doc/refman/5.7/en/create-database.html
An error occurs if the database exists and you did not specify IF NOT EXISTS. CREATE {DATABASE | SCHEMA} [IF NOT EXISTS] db_name [create_option] ... create_option: [DEFAULT] { CHARACTER SET [=] charset_name | COLLATE [=] collation_name } CREATE ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-cpustat-1sec.html
The cpustat-1sec table provides raw, per-thread CPU data obtained each second for each thread running in the NDB kernel. Like cpustat_50ms and cpustat_20sec, this table shows 20 measurement sets per thread, each referencing a period of the named ...