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https://dev.mysql.com/doc/refman/5.7/en/optimizing-innodb.html
InnoDB is the storage engine that MySQL customers typically use in production databases where reliability and concurrency are important. This section explains how to optimize database operations for InnoDB tables.
https://dev.mysql.com/doc/refman/5.7/en/optimizing-server.html
This section discusses optimization techniques for the database server, primarily dealing with system configuration rather than tuning SQL statements. The information in this section is appropriate for DBAs who want to ensure performance and ...
https://dev.mysql.com/doc/refman/5.7/en/pam-pluggable-authentication.html
There can be multiple applications associated with a single database server instance, so the choice of service name is left to the SQL application developer. Any user who connects using the proxy account is mapped to one of those MySQL accounts, the ... Note PAM pluggable authentication is an extension included in MySQL Enterprise Edition, a commercial ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-host-cache-table.html
For example, the database does not exist or the user has no privileges to access it. The MySQL server maintains an in-memory host cache that contains client host name and IP address information and is used to avoid Domain Name System (DNS) lookups.
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-object-filtering.html
The effect of the default object configuration is to instrument all objects except those in the mysql, INFORMATION_SCHEMA, and performance_schema databases. (Tables in the INFORMATION_SCHEMA database are not instrumented regardless of the contents ... The setup_objects table controls whether the Performance Schema monitors particular table and stored program ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-setup-objects-table.html
The effect of the default object configuration is to instrument all tables except those in the mysql, INFORMATION_SCHEMA, and performance_schema databases. (Tables in the INFORMATION_SCHEMA database are not instrumented regardless of the contents of ... The setup_objects table controls whether the Performance Schema monitors particular ...
https://dev.mysql.com/doc/refman/5.7/en/rename-user.html
To use RENAME USER, you must have the global CREATE USER privilege, or the UPDATE privilege for the mysql system database. However, RENAME USER does not automatically drop or invalidate databases or objects within them that the old user created.
https://dev.mysql.com/doc/refman/5.7/en/replica-logs-relaylog.html
The relay log, like the binary log, consists of a set of numbered files containing events that describe database changes, and an index file that contains the names of all used relay log files. The term “relay log file” generally denotes an ...
https://dev.mysql.com/doc/refman/5.7/en/replication-bugs.html
If you have a repeatable test case that demonstrates the bug, please enter it into our bugs database using the instructions given in Section 1.5, “How to Report Bugs or Problems”. Then enter the problem with as much information as possible into ... When you have determined that there is no user error involved, and replication still either does not work at all or is unstable, it is time to send us a bug ...
https://dev.mysql.com/doc/refman/5.7/en/replication-delayed.html
To inspect what the database looked like long ago, without having to reload a backup. For example, if the delay is one week and the DBA needs to see what the database looked like before the last few days' worth of development, the delayed replica ...