Abstract: Systems and methods for clustering metrics for reducing a search space of metrics used for service health analyses. Determining a root cause of an event includes performing an automated analysis of metrics associated with the service. To diagnose and resolve events quickly and efficiently, aspects correlate and cluster a plurality of metrics for a specific service based on historical data, where each cluster represents a root cause direction. After clustering metrics by similarity, metrics are scored and ranked to select representative metrics from each cluster, which reduces the dimensionality of the search space. The representative metrics may provide a saliant representation of each metrics cluster. The representative metrics are provided to a service health analyzer, which performs a root cause analysis of the representative metrics to diagnose and mitigate the event.