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https://dev.mysql.com/doc/refman/9.7/en/performance-schema-statement-summary-tables.html
The Performance Schema maintains tables for collecting current and recent statement events, and aggregates that information in summary tables. Section 29.12.6, “Performance Schema Statement Event Tables” describes the events on which statement ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-tp-thread-state-table.html
The tp_thread_state table has one row per thread created by the thread pool to handle connections. The tp_thread_state table has these columns: TP_GROUP_ID The thread group ID. TP_GROUP_ID and TP_THREAD_NUMBER together provide a unique key within ...
https://dev.mysql.com/doc/refman/9.7/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 29.12.7, “Performance Schema Transaction Tables” describes the events on which transaction ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-transaction-tables.html
Within the event hierarchy, wait events nest within stage events, which nest within statement events, which nest within transaction events. These tables store transaction events: events_transactions_current: The current transaction event for each ...
https://dev.mysql.com/doc/refman/9.7/en/persisted-system-variables.html
The MySQL server maintains system variables that configure its operation. A system variable can have a global value that affects server operation as a whole, a session value that affects the current session, or both. Many system variables are ...
https://dev.mysql.com/doc/refman/9.7/en/privilege-changes.html
If the mysqld server is started without the --skip-grant-tables option, it reads all grant table contents into memory during its startup sequence. The in-memory tables become effective for access control at that point. If you modify the grant ...
https://dev.mysql.com/doc/refman/9.7/en/replication-binlog-encryption-scope.html
Existing binary log files and relay log files that were present on the server when you started encryption are not encrypted. You can purge these files when they are no longer needed. Data in motion in the replication event stream, which is sent to ...
https://dev.mysql.com/doc/refman/9.7/en/replication-howto-slaveinit.html
To set up the replica to communicate with the source for replication, configure the replica with the necessary connection information. To do this, on the replica, execute the following CHANGE REPLICATION SOURCE TO statement, replacing the option ...
https://dev.mysql.com/doc/refman/9.7/en/replication-howto.html
This section describes how to set up a MySQL server to use binary log file position based replication. There are a number of different methods for setting up replication, and the exact method to use depends on how you are setting up replication, ...
https://dev.mysql.com/doc/refman/9.7/en/replication-multi-source-configuration.html
A multi-source replication topology requires at least two sources and one replica configured. In these tutorials, we assume that you have two sources source1 and source2, and a replica replicahost. The replica replicates one database from each of ...