dimension

This represents a single "dimension" of a Metric that can be used to query independently. For instance, response times for operations can be sliced by the operation type, so that's a dimension. The number of operations performed by external servers from the Proxy Server's point of view has Dimensions of 1) the external server instance, 2) the type of the operation, and 3) the result (success/failure/timeout) of the operation. The Dimension serves two purposes. One is for selecting the data that contributes to the query results. For instance, you might be interested in the response time for only search operations. The second purpose is to display the query results broken down by a given Dimension, For example, seeing the average response time separately for each operation type.