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https://dev.mysql.com/doc/refman/9.7/en/performance-schema-replication-tables.html
This is similar to the information available from the SHOW REPLICA STATUS statement, but representation in table form is more accessible and has usability benefits: SHOW REPLICA STATUS output is useful for visual inspection, but not so much for ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-table-handles-table.html
The Performance Schema exposes table lock information through the table_handles table to show the table locks currently in effect for each opened table handle. This information shows which table handles the server has open, how they are locked, and ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-tp-connections-table.html
The tp_connections table contains one row per connection managed by the Thread Pool plugin. Each row provides information about the current state of a thread pool connection. The tp_connections table contains the following rows: CONNECTION_ID The ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-tp-thread-group-state-table.html
The tp_thread_group_state table has one row per thread group in the thread pool. Each row provides information about the current state of a group. The tp_thread_group_state table has these columns: TP_GROUP_ID The thread group ID. There is at most ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-variables-info-table.html
The variables_info table shows, for each system variable, the source from which it was most recently set, and its range of values. VARIABLE_SOURCE The source from which the variable was most recently set: COMMAND_LINE The variable was set on the ...
https://dev.mysql.com/doc/refman/9.7/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/9.7/en/precision-math-examples.html
This section provides some examples that show precision math query results in MySQL. These examples demonstrate the principles described in Section 14.26.3, “Expression Handling”, and Section 14.26.4, “Rounding Behavior”. Consider the ...
https://dev.mysql.com/doc/refman/9.7/en/program-variables.html
Many MySQL programs have internal variables that can be set at runtime using the SET statement. See Section 15.7.6.1, “SET Syntax for Variable Assignment”, and Section 7.1.9, “Using System Variables”. Most of these program variables also ...
https://dev.mysql.com/doc/refman/9.7/en/regexp.html
This section discusses the functions and operators available for regular expression matching and illustrates, with examples, some of the special characters and constructs that can be used for regular expression operations. MySQL implements regular ...
https://dev.mysql.com/doc/refman/9.7/en/repair-table.html
[QUICK] [EXTENDED] [USE_FRM] REPAIR TABLE repairs a possibly corrupted table, for certain storage engines only. Although normally you should never have to run REPAIR TABLE, if disaster strikes, this statement is very likely to get back all your data ...