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https://dev.mysql.com/doc/refman/8.4/en/information-schema-role-table-grants-table.html
The ROLE_TABLE_GRANTS table has these columns: GRANTOR The user name part of the account that granted the role. GRANTEE The user name part of the account to which the role is granted. The ROLE_TABLE_GRANTS table provides information about the table ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-performance-thread_concurrency.html
InnoDB uses operating system threads to process requests from user transactions. When InnoDB receives a new request from a user session, if the number of threads concurrently executing is at a pre-defined limit, the new request sleeps for a short ...(Transactions may issue many requests to InnoDB before they commit or roll back.) On modern operating systems and servers with multi-core processors, where context switching is efficient, most workloads run well without any limit on the number of concurrent ...
https://dev.mysql.com/doc/refman/8.4/en/internal-locking.html
Row-Level Locking Table-Level Locking Choosing the Type of Locking Row-Level Locking MySQL uses row-level locking for InnoDB tables to support simultaneous write access by multiple sessions, making them suitable for multi-user, highly concurrent, ...
https://dev.mysql.com/doc/refman/8.4/en/introduction.html
The MySQL software delivers a very fast, multithreaded, multi-user, and robust SQL (Structured Query Language) database server. Users can choose to use the MySQL software as an Open Source product under the terms of the GNU General Public License ...MySQL Server is intended for mission-critical, heavy-load production systems as well as for embedding into mass-deployed ...
https://dev.mysql.com/doc/refman/8.4/en/linux-installation-debian.html
Users who want to set a password later can leave the password field blank in the dialogue box and just press OK; in that case, root access to the server is authenticated using the MySQL Socket Peer-Credential Authentication Plugin for connections ...
https://dev.mysql.com/doc/refman/8.4/en/locking-functions.html
The OBJECT_TYPE column says USER LEVEL LOCK and the OBJECT_NAME column indicates the lock name. When this happens, the server chooses a caller and terminates its lock-acquisition request with an ER_USER_LOCK_DEADLOCK error. While held by one ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-ndbinfo-error-messages.html
The error_messages table provides information about The error_messages table contains the following columns: error_code Numeric error code error_description Description of error error_status Error status code error_classification Error ...
https://dev.mysql.com/doc/refman/8.4/en/optimize-overview.html
Typical users aim to get the best database performance out of their existing software and hardware configurations. Advanced users look for opportunities to improve the MySQL software itself, or develop their own storage engines and hardware ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-consumer-configurations.html
The consumer settings in the setup_consumers table form a hierarchy from higher levels to lower. The following discussion describes how consumers work, showing specific configurations and their effects as consumer settings are enabled progressively ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-persisted-variables-table.html
The persisted_variables table provides an SQL interface to the mysqld-auto.cnf file that stores persisted global system variable settings, enabling the file contents to be inspected at runtime using SELECT statements. Variables are persisted using ...