26.4.4.4 The ps_setup_disable_background_threads() Procedure
          Disables Performance Schema instrumentation for all background
          threads. Produces a result set indicating how many background
          threads were disabled. Already disabled threads do not count.
        
mysql> CALL sys.ps_setup_disable_background_threads();
+--------------------------------+
| summary                        |
+--------------------------------+
| Disabled 24 background threads |
+--------------------------------+