diff --git opencensus/stats/internal/delta_producer.cc opencensus/stats/internal/delta_producer.cc
--- opencensus/stats/internal/delta_producer.cc
+++ opencensus/stats/internal/delta_producer.cc
@@ -139,5 +139,9 @@ void DeltaProducer::RunHarvesterLoop() {
   }
 }
 
+void DeltaProducer::SetHarvestInterval(const absl::Duration interval) {
+  harvest_interval_ = interval;
+}
+
 }  // namespace stats
 }  // namespace opencensus
diff --git opencensus/stats/internal/delta_producer.h opencensus/stats/internal/delta_producer.h
--- opencensus/stats/internal/delta_producer.h
+++ opencensus/stats/internal/delta_producer.h
@@ -84,6 +84,8 @@ class DeltaProducer final {
   // Flushes the active delta and blocks until it is harvested.
   void Flush() LOCKS_EXCLUDED(delta_mu_, harvester_mu_);
 
+  void SetHarvestInterval(const absl::Duration interval);
+
  private:
   DeltaProducer();
 
@@ -100,7 +102,7 @@ class DeltaProducer final {
   // every harvest_interval_.
   void RunHarvesterLoop();
 
-  const absl::Duration harvest_interval_ = absl::Seconds(5);
+  absl::Duration harvest_interval_ = absl::Seconds(5);
 
   // Guards the active delta and its configuration. Anything that changes the
   // delta configuration (e.g. adding a measure or BucketBoundaries) must