MySQL 8.0 Release Notes
        MySQL 8.0 Source Code Documentation
        
Given a connection ID, disables Performance Schema instrumentation for the thread. Produces a result set indicating how many threads were disabled. Already disabled threads do not count.
- in_connection_id BIGINT: The connection ID. This is a value of the type given in the- PROCESSLIST_IDcolumn of the Performance Schema- threadstable or the- Idcolumn of- SHOW PROCESSLISToutput.
Disable a specific connection by its connection ID:
mysql> CALL sys.ps_setup_disable_thread(225);
+-------------------+
| summary           |
+-------------------+
| Disabled 1 thread |
+-------------------+Disable the current connection:
mysql> CALL sys.ps_setup_disable_thread(CONNECTION_ID());
+-------------------+
| summary           |
+-------------------+
| Disabled 1 thread |
+-------------------+