code: public static void incrLogMetrics(Map<String, Long> incrMetrics) {
      if (incrMetrics == null || incrMetrics.size() == 0) {
        return;
      }
      MetricsRegistry registry = RaidNodeMetrics.getInstance(
          RaidNodeMetrics.DEFAULT_NAMESPACE_ID).getMetricsRegistry();
      Map<String, MetricsTimeVaryingLong> logMetrics = RaidNodeMetrics.getInstance(
          RaidNodeMetrics.DEFAULT_NAMESPACE_ID).logMetrics;
      synchronized(logMetrics) {
        for (String key : incrMetrics.keySet()) {
          if (!logMetrics.containsKey(key)) {
            logMetrics.put(key, new MetricsTimeVaryingLong(key, registry));
          }
          ((MetricsTimeVaryingLong)logMetrics.get(key)).inc(incrMetrics.get(key));
        }
      }
    }
docs: Increase logMetrics in the Raidnode metrics