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https://dev.mysql.com/doc/refman/5.7/en/performance-schema-status-variable-tables.html
Note The value of the show_compatibility_56 system variable affects the information available from the tables described here. For details, see the description of that variable in Section 5.1.7, “Server System Variables”. The MySQL server ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-transaction-summary-tables.html
The Performance Schema maintains tables for collecting current and recent transaction events, and aggregates that information in summary tables. Section 25.12.7, “Performance Schema Transaction Tables” describes the events on which transaction ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-variable-table-migration.html
The INFORMATION_SCHEMA has tables that contain system and status variable information (see Section 24.3.11, “The INFORMATION_SCHEMA GLOBAL_VARIABLES and SESSION_VARIABLES Tables”, and Section 24.3.10, “The INFORMATION_SCHEMA GLOBAL_STATUS and ...
https://dev.mysql.com/doc/refman/5.7/en/privilege-checking.html
In complex scenarios where the query uses SQL SECURITY DEFINER views or stored routines, it may be that a user is denied from seeing the trace of its query because it lacks some extra privileges on those objects. In that case, the trace will be ...
https://dev.mysql.com/doc/refman/5.7/en/reloading-delimited-text-dumps.html
For backups produced with mysqldump --tab, each table is represented in the output directory by an .sql file containing the CREATE TABLE statement for the table, and a .txt file containing the table data. To reload a table, first change location ...
https://dev.mysql.com/doc/refman/5.7/en/replication-features-max-allowed-packet.html
max_allowed_packet sets an upper limit on the size of any single message between the MySQL server and clients, including replicas. If you are replicating large column values (such as might be found in TEXT or BLOB columns) and max_allowed_packet is ...
https://dev.mysql.com/doc/refman/5.7/en/replication-solutions-switch.html
You can tell a replica to change to a new source using the CHANGE MASTER TO statement. The replica does not check whether the databases on the source are compatible with those on the replica; it simply begins reading and executing events from the ...
https://dev.mysql.com/doc/refman/5.7/en/reset.html
reset_option: { MASTER | QUERY CACHE | SLAVE } The RESET statement is used to clear the state of various server operations. The following list describes the permitted RESET statement reset_option values: RESET MASTER Deletes all binary logs listed ...
https://dev.mysql.com/doc/refman/5.7/en/session-state-tracking.html
A client can enable these trackers to receive notification of changes to its session state. Uses for Session State Trackers Available Session State Trackers C API Session State Tracker Support Test Suite Session State Tracker Support Uses for ...
https://dev.mysql.com/doc/refman/5.7/en/sha256-pluggable-authentication.html
MySQL provides two authentication plugins that implement SHA-256 hashing for user account passwords: sha256_password: Implements basic SHA-256 authentication. caching_sha2_password: Implements SHA-256 authentication (like sha256_password), but uses ...