Report for nanosecond latencies

@@ -77,7 +77,7 @@ public final class MetricsManager implements MetricsService {
         this.reporter = Slf4jReporter.forRegistry(this.metricsRegistry)
                 .outputTo(log)
                 .convertRatesTo(TimeUnit.SECONDS)
-                .convertDurationsTo(TimeUnit.MILLISECONDS)
+                .convertDurationsTo(TimeUnit.NANOSECONDS)
                 .build();
         reporter.start(1, TimeUnit.MINUTES);
     }