A measure is the smallest grouping entity for the values that are collected during a load test or during a monitoring session for a particular measuring point. A measure has a name and type. A set of measured values that are related to the measure is stored as a series in a time series data (.tsd) file.
Measures can be either timers or counters. Timers collect data related to response times, counters collect data on throughput and load test events.
Performance Explorer provides a big amount of measures, which are divided into groups.