diff --git a/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OzoneManager.java b/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OzoneManager.java
index 9a67fed1268..9e12941a55d 100644
--- a/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OzoneManager.java
+++ b/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/OzoneManager.java
@@ -1668,11 +1668,10 @@ public void start() throws IOException {
           versionManager.getMetadataLayoutVersion(), layoutVersionInDB);
     }
 
-    // Set metrics and start metrics back ground thread
-    metrics.setNumVolumes(metadataManager.countRowsInTable(metadataManager
-        .getVolumeTable()));
-    metrics.setNumBuckets(metadataManager.countRowsInTable(metadataManager
-        .getBucketTable()));
+    metrics.setNumVolumes(metadataManager
+        .countEstimatedRowsInTable(metadataManager.getVolumeTable()));
+    metrics.setNumBuckets(metadataManager
+        .countEstimatedRowsInTable(metadataManager.getBucketTable()));
 
     if (getMetricsStorageFile().exists()) {
       OmMetricsInfo metricsInfo = READER.readValue(getMetricsStorageFile());