This metric shows the percentage of query executions that have been able to reuse execution plans.
Query execution reuse
The percentage of query executions that have been able to reuse cached query plans.
The T-SQL query that will collect data
Instances to collect from
Databases to collect from
Use collected or calculated values
Leave the Use a calculated rate of change between collections check box unchecked
An alert for this metric can be created after establishing a baseline.