- /*
- * Expand a single value to two metrics:
- *
- * - The absolute counter, as a gauge
- * - A derived rate for this counter
- */
- values[0].derive = (derive_t) metric->value;
- plugin_dispatch_values(&vl);
-
- sstrncpy(vl.type, "gauge", sizeof (vl.type));
- values[0].gauge = (gauge_t) metric->value;
+ gauge_t delta = nearbyint (metric->value);
+
+ /* Etsy's statsd writes counters as two metrics: a rate and the change since
+ * the last write. Since collectd does not reset its DERIVE metrics to zero,
+ * this makes little sense, but we're dispatching a "count" metric here
+ * anyway - if requested by the user - for compatibility reasons. */
+ if (conf_counter_sum)
+ {
+ sstrncpy (vl.type, "count", sizeof (vl.type));
+ values[0].gauge = delta;
+ plugin_dispatch_values (&vl);
+
+ /* restore vl.type */
+ sstrncpy (vl.type, "derive", sizeof (vl.type));
+ }
+
+ /* Rather than resetting value to zero, subtract delta so we correctly keep
+ * track of residuals. */
+ metric->value -= delta;
+ metric->counter += (derive_t) delta;
+
+ values[0].derive = metric->counter;