diff --git a/internal/metrics/querycoord_metrics.go b/internal/metrics/querycoord_metrics.go
index ca3241ac6f..c191f9dce5 100644
--- a/internal/metrics/querycoord_metrics.go
+++ b/internal/metrics/querycoord_metrics.go
@@ -64,8 +64,8 @@ var (
 			Namespace: milvusNamespace,
 			Subsystem: typeutil.QueryCoordRole,
 			Name:      "load_latency",
-			Help:      "latency of load request",
-			Buckets:   buckets,
+			Help:      "latency of load the entire collection",
+			Buckets:   []float64{0, 500, 1000, 2000, 5000, 10000, 20000, 50000, 60000, 300000, 600000, 1800000},
 		}, []string{})
 
 	QueryCoordReleaseLatency = prometheus.NewHistogramVec(
diff --git a/internal/querycoordv2/job/job.go b/internal/querycoordv2/job/job.go
index 7dc02b0356..8cb24dd101 100644
--- a/internal/querycoordv2/job/job.go
+++ b/internal/querycoordv2/job/job.go
@@ -167,6 +167,7 @@ func (job *LoadCollectionJob) PreExecute() error {
 			log.Warn(msg)
 			return utils.WrapError(msg, ErrLoadParameterMismatched)
 		}
+
 		return ErrCollectionLoaded
 	}
 
diff --git a/internal/querycoordv2/observers/collection_observer.go b/internal/querycoordv2/observers/collection_observer.go
index 5905b633df..298baef092 100644
--- a/internal/querycoordv2/observers/collection_observer.go
+++ b/internal/querycoordv2/observers/collection_observer.go
@@ -158,9 +158,9 @@ func (ob *CollectionObserver) observeCollectionLoadStatus(collection *meta.Colle
 	channelTargets := ob.targetMgr.GetDmChannelsByCollection(collection.GetCollectionID(), meta.NextTarget)
 	targetNum := len(segmentTargets) + len(channelTargets)
 	log.Info("collection targets",
-		zap.Int("segment-target-num", len(segmentTargets)),
-		zap.Int("channel-target-num", len(channelTargets)),
-		zap.Int("total-target-num", targetNum))
+		zap.Int("segmentTargetNum", len(segmentTargets)),
+		zap.Int("channelTargetNum", len(channelTargets)),
+		zap.Int("totalTargetNum", targetNum))
 
 	updated := collection.Clone()
 	loadedCount := 0
@@ -187,8 +187,8 @@ func (ob *CollectionObserver) observeCollectionLoadStatus(collection *meta.Colle
 		}
 		if loadedCount > 0 {
 			log.Info("collection load progress",
-				zap.Int("sub-channel-count", subChannelCount),
-				zap.Int("load-segment-count", loadedCount-subChannelCount),
+				zap.Int("subChannelCount", subChannelCount),
+				zap.Int("loadSegmentCount", loadedCount-subChannelCount),
 			)
 		}
 
@@ -253,8 +253,8 @@ func (ob *CollectionObserver) observePartitionLoadStatus(partition *meta.Partiti
 		}
 		if loadedCount > 0 {
 			log.Info("partition load progress",
-				zap.Int("sub-channel-count", subChannelCount),
-				zap.Int("load-segment-count", loadedCount-subChannelCount))
+				zap.Int("subChannelCount", subChannelCount),
+				zap.Int("loadSegmentCount", loadedCount-subChannelCount))
 		}
 		updated.LoadPercentage = int32(loadedCount * 100 / targetNum)