Performance Schema System Variables Default Value -1  (signifies autosizing; do not assign this literal value) The number of rows per thread in the  events_waits_history  table. • performance_schema_hosts_size Command-Line Format --performance-schema-hosts-size=# System Variable performance_schema_hosts_size Scope Global Dynamic No SET_VAR  Hint Applies No Type Integer Default Value -1  (signifies autoscaling; do not assign this literal value) Minimum Value -1  (signifies autoscaling; do not assign this literal value) Maximum Value 1048576 Command-Line Format --performance-schema-max-cond- classes=# System Variable performance_schema_max_cond_classes Scope Global Dynamic No SET_VAR  Hint Applies No Type Integer Default Value ( ≥  8.0.13) 100 Default Value ( ≤  8.0.12) 80 Minimum Value 0 Maximum Value ( ≥  8.0.12) 1024 Maximum Value (8.0.11) 256 The maximum number of condition instruments. For information about how to set and use this variable, see Section 27.7, “Performance Schema Status Monitoring” . The number of rows in the  hosts  table. If this variable is 0, the Performance Schema does not maintain connection statistics in the  hosts  table or status variable information in the  status_by_host  table. • performance_schema_max_cond_classes • performance_schema_max_cond_instances Command-Line Format --performance-schema-max-cond- instances=# System Variable performance_schema_max_cond_instances Scope Global 5106