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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-transactions-current-table.html
The table stores one row per thread showing the current status of the thread's most recent monitored transaction event, so there is no system variable for configuring the table size. For example: mysql> SELECT * FROM ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-waits-current-table.html
The table stores one row per thread showing the current status of the thread's most recent monitored wait event, so there is no system variable for configuring the table size. Of the tables that contain wait event rows, events_waits_current is the ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-functions.html
As of MySQL 8.0.16, MySQL includes built-in SQL functions that format or retrieve Performance Schema data, and that may be used as equivalents for the corresponding sys schema stored functions. The built-in functions can be invoked in any schema ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-instrument-naming.html
An instrument name consists of a sequence of elements separated by '/' characters. Example names: wait/io/file/myisam/log wait/io/file/mysys/charset wait/lock/table/sql/handler wait/synch/cond/mysys/COND_alarm ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-performance-timers-table.html
For an explanation of how event timing occurs, see Section 29.4.1, “Performance Schema Event Timing”. For a cycle timer, the frequency is generally related to the CPU speed. For example, on a system with a 2.4GHz processor, the CYCLE may be ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-applier-configuration-table.html
This table shows the configuration parameters that affect transactions applied by the replica. Parameters stored in the table can be changed at runtime with the CHANGE REPLICATION SOURCE TO statement (from MySQL 8.0.23) or CHANGE MASTER TO ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-thread-filtering.html
The threads table contains a row for each server thread. Each row contains information about a thread and indicates whether monitoring is enabled for it. For the Performance Schema to monitor a thread, these things must be true: The ...
https://dev.mysql.com/doc/refman/8.0/en/pluggable-authentication.html
When a client connects to the MySQL server, the server uses the user name provided by the client and the client host to select the appropriate account row from the mysql.user system table. The server then authenticates the client, determining from ...
https://dev.mysql.com/doc/refman/8.0/en/privileges-provided.html
The privileges granted to a MySQL account determine which operations the account can perform. MySQL privileges differ in the contexts in which they apply and at different levels of operation: Administrative privileges enable users to manage ...
https://dev.mysql.com/doc/refman/8.0/en/problems-connecting.html
If you encounter problems when you try to connect to the MySQL server, the following items describe some courses of action you can take to correct the problem. To correct this when you invoke a client program, specify a --port option to indicate ...