code: public void disableManager() {
      logger.info("Disabling Metric Manager");
      if (isManagerEnabled) {
        isManagerEnabled = false;
        for (final IMetricEmitter emitter : this.metricEmitters) {
          try {
            emitter.purgeAllData();
          } catch (final MetricException ex) {
            logger.error("Failed to purge data ", ex);
          }
        }
      }
    }
docs: Disable Metric Manager and ask all emitters to purge all available data.