MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
This view returns information about lost Performance Schema instruments, to indicate whether the Performance Schema is unable to monitor all runtime data.
The
ps_check_lost_instrumentation
view has these columns:
variable_name
The Performance Schema status variable name indicating which type of instrument was lost.
variable_value
The number of instruments lost.