code>, the config directs Mixer to supply a value of <code>2</code> for the instance. Because Istio generates an instance for each request, this means that this metric records a value equal to twice the total number of requests received.</p><p>A set of <code>dimensions</code> are specified for each <code>doublerequestcount.metric</code> instance. Dimensions provide a way to slice, aggregate, and analyze metric data according to different needs and directions of inquiry. For instance, it may be desirable to 