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https://dev.mysql.com/doc/refman/8.0/en/partitioning-management-hash-key.html
Tables which are partitioned by hash or by key are very similar to one another with regard to making changes in a partitioning setup, and both differ in a number of ways from tables which have been partitioned by range or list. For that reason, ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-management.html
Note All partitions of a partitioned table must have the same number of subpartitions; it is not possible to change the subpartitioning once the table has been created. There are a number of ways using SQL statements to modify partitioned tables; ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-subpartitions.html
Subpartitioning—also known as composite partitioning—is the further division of each partition in a partitioned table. Consider the following CREATE TABLE statement: CREATE TABLE ts (id INT, purchased DATE) PARTITION BY RANGE( YEAR(purchased) ) ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning.html
We encourage you to check here for links to blogs kept by those working with MySQL Partitioning, or to have your own blog added to those covered. Note Table partitioning differs from partitioning as used by window functions. In MySQL 8.0, ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-connection-attribute-tables.html
Connection attributes are key-value pairs that application programs can pass to the server at connect time. For applications based on the C API implemented by the libmysqlclient client library, the mysql_options() and mysql_options4() functions ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-error-summary-tables.html
The error summary tables have these indexes: events_errors_summary_by_account_by_error: Primary key on (USER, HOST, ERROR_NUMBER) events_errors_summary_by_host_by_error: Primary key on (HOST, ERROR_NUMBER) events_errors_summary_by_thread_by_error: ... The Performance Schema maintains summary tables for aggregating statistical information about server errors (and ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-examples.html
To begin, you should have a repeatable use case where performance is deemed “too slow” and needs optimization, and you should enable all instrumentation (no pre-filtering at all). The Performance Schema is a tool to help a DBA do performance ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-filtering-names.html
WHERE NAME LIKE 'wait/io/file/%'; A pattern of '%/file/%' matches other instruments that have an element of '/file/' anywhere in the name. Names given for filtering operations can be as specific or general as required. For example, to select all ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-filtering.html
To avoid filling the current-events or history tables with events in which you have no interest. Events are processed in a producer/consumer fashion: Instrumented code is the source for events and produces events to be collected. The ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-host-cache-table.html
COUNT_PROXY_USER_ACL_ERRORS The number of errors detected when proxy user A is proxied to another user B who does exist but for whom A does not have the PROXY privilege. The MySQL server maintains an in-memory host cache that contains client host ...