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https://dev.mysql.com/doc/refman/8.0/en/numeric-type-syntax.html
The FIXED synonym is available for compatibility with other database systems. For integer data types, M indicates the minimum display width. Display width is unrelated to the range of values a type can store, as described in Section 13.1.6, ...
https://dev.mysql.com/doc/refman/8.0/en/optimize-benchmarking.html
For benchmarking, sometimes you must simulate a heavy database workload to get an accurate picture. To measure performance, consider the following factors: Whether you are measuring the speed of a single operation on a quiet system, or how a set of ...
https://dev.mysql.com/doc/refman/8.0/en/optimize-blob.html
Since the performance requirements to retrieve and display a BLOB value might be very different from other data types, you could put the BLOB-specific table on a different storage device or even a separate database instance. When storing a large ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-queries-myisam.html
This also gives better performance with most database systems, because the row locking manager in this case has less to do. Some general tips for speeding up queries on MyISAM tables: To help MySQL better optimize queries, use ANALYZE TABLE or run ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-columns-range.html
In addition, changing the character set or collation for a given database, table, or column after such a table is created may cause changes in how rows are distributed. Range columns partitioning is similar to range partitioning, but enables you to ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning.html
The PARTITIONS table in the INFORMATION_SCHEMA database provides information about partitions and partitioned tables. Note Table partitioning differs from partitioning as used by window functions. In MySQL 8.0, partitioning support is provided by ...
https://dev.mysql.com/doc/refman/8.0/en/password-security-admin.html
Database administrators should use the following guidelines to keep passwords secure. MySQL stores passwords for user accounts in the mysql.user system table. Access to this table should never be granted to any nonadministrative accounts. Account ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-and-plugins.html
The associated event information, including aggregate information, remains readable in performance_schema database tables. Removing a plugin with UNINSTALL PLUGIN does not affect information already collected for code in that plugin. Time spent ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-connection-tables.html
When a client connects to the MySQL server, it does so under a particular user name and from a particular host. They differ in that, for grant tables, the host part of an account can be a pattern, whereas for Performance Schema tables, the host ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-statements-current-table.html
CURRENT_SCHEMA The default database for the statement, NULL if there is none. The table stores one row per thread showing the current status of the thread's most recent monitored statement event, so there is no system variable for configuring the ...