Metrics for a computer resource are collected. A signature representing a state of the computer resource from the metrics are determined by determining raw values for each of the metrics and generating a vector from at least some of the raw values for the metrics, where generating the vector further comprises generating models for possible system states of the computer resource, determining a model that closely matches a state of the computer resource, determining key metrics for the model, and determining a vector of values from the key metrics. An annotation that describes the state of the computer resource is received and associated with the signature. The signature and the associated annotation are stored such that they are searchable.