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https://dev.mysql.com/doc/refman/8.0/en/information-schema-user-attributes-table.html
The USER_ATTRIBUTES table (available as of MySQL 8.0.21) provides information about user comments and user attributes. The USER_ATTRIBUTES table has these columns: USER The user name portion of the account to which the ATTRIBUTE column value ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-autocommit-commit-rollback.html
If autocommit mode is enabled, each SQL statement forms a single transaction on its own. By default, MySQL starts the session for each new connection with autocommit enabled, so MySQL does a commit after each SQL statement if that statement did not ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-compression-tuning-monitoring.html
Overall application performance, CPU and I/O utilization and the size of disk files are good indicators of how effective compression is for your application. This section builds on the performance tuning advice from Section 17.9.1.3, “Tuning ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-create-table-external.html
There are different reasons for creating InnoDB tables externally; that is, creating tables outside of the data directory. Those reasons might include space management, I/O optimization, or placing tables on a storage device with particular ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-internal-data.html
Note This section describes locking information as exposed by the Performance Schema data_locks and data_lock_waits tables, which supersede the INFORMATION_SCHEMA INNODB_LOCKS and INNODB_LOCK_WAITS tables in MySQL 8.0. For similar discussion ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached-internals.html
InnoDB API for the InnoDB memcached Plugin The InnoDB memcached engine accesses InnoDB through InnoDB APIs, most of which are directly adopted from embedded InnoDB. InnoDB API functions are passed to the InnoDB memcached engine as callback ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached-multiple-get-range-query.html
The daemon_memcached plugin supports multiple get operations (fetching multiple key-value pairs in a single memcached query) and range queries. Multiple get Operations The ability to fetch multiple key-value pairs in a single memcached query ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-online-ddl-operations.html
Online support details, syntax examples, and usage notes for DDL operations are provided under the following topics in this section. Index Operations Primary Key Operations Column Operations Generated Column Operations Foreign Key Operations Table ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-page-compression.html
InnoDB supports page-level compression for tables that reside in file-per-table tablespaces. Page compression is enabled by specifying the COMPRESSION attribute with CREATE TABLE or ALTER TABLE. Supported Platforms Page compression requires sparse ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-performance-schema.html
This section provides a brief introduction to InnoDB integration with Performance Schema. For comprehensive Performance Schema documentation, see Chapter 29, MySQL Performance Schema. You can profile certain internal InnoDB operations using the ...