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https://dev.mysql.com/doc/refman/5.7/en/index-btree-hash.html
In other words, to be able to use an index, a prefix of the index must be used in every AND group. Understanding the B-tree and hash data structures can help predict how different queries perform on different storage engines that use these data ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-metrics-table.html
You can also perform these actions for a group of counters using their common module name. The INNODB_METRICS table provides a wide variety of InnoDB performance information, complementing the specific focus areas of the Performance Schema tables ...
https://dev.mysql.com/doc/refman/5.7/en/operator-precedence.html
Operator precedences are shown in the following list, from highest precedence to the lowest. Operators that are shown together on a line have the same precedence. When used as a comparison operator, it has the same precedence as <=>, >=, >, <=, <, ...
https://dev.mysql.com/doc/refman/5.7/en/optimize-character.html
The GROUP BY and ORDER BY clauses can generate temporary tables, and these temporary tables can use the MEMORY storage engine if the original table does not contain any BLOB columns. For character and string columns, follow these guidelines: Use ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-file-summary-tables.html
Each file I/O summary table has one or more grouping columns to indicate how the table aggregates events. The Performance Schema maintains file I/O summary tables that aggregate information about I/O operations. Example file I/O event summary ...
https://dev.mysql.com/doc/refman/5.7/en/set.html
A table can have no more than 255 unique element list definitions among its ENUM and SET columns considered as a group. A SET is a string object that can have zero or more values, each of which must be chosen from a list of permitted values ...
https://dev.mysql.com/doc/refman/5.7/en/sys-latest-file-io.html
These views summarize file I/O activity, grouped by file and thread. The latest_file_io and x$latest_file_io views have these columns: thread For foreground threads, the account associated with the thread (and port number for TCP/IP connections).
https://dev.mysql.com/doc/refman/5.7/en/sys-schema-usage.html
Most of these views come in pairs, such that one member of the pair has the same name as the other member, plus a x$ prefix. The view with the x$ prefix that displays the same values in raw form is intended more for use with other tools that perform ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-online-add-node-example.html
In this section we provide a detailed example illustrating how to add new NDB Cluster data nodes online, starting with an NDB Cluster having 2 data nodes in a single node group and concluding with a cluster having 4 data nodes in 2 node groups. You ...This make it easier later to assign node IDs that are not already in use to data nodes which are newly ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-installer-workflow.html
The group must be established on Windows before you can select it from the list. Windows requires a newly added member to first log out and then log in again to join a local group. In the Windows Security Tokens area, enter a token for each Windows ... MySQL Installer provides a wizard-like tool to install and configure new MySQL products for ...