diff --git a/internal/querycoord/cluster.go b/internal/querycoord/cluster.go
index 02879407e3..c0a361da68 100644
--- a/internal/querycoord/cluster.go
+++ b/internal/querycoord/cluster.go
@@ -741,19 +741,8 @@ func estimateSegmentsSize(segments *querypb.LoadSegmentsRequest, kvClient kv.Dat
 
 		// get binlog size
 		for _, binlogPath := range loadInfo.BinlogPaths {
-			for _, path := range binlogPath.Binlogs {
-				binlogSize, err := storage.EstimateMemorySize(kvClient, path.GetLogPath())
-				if err != nil {
-					binlogSize, err = storage.GetBinlogSize(kvClient, path.GetLogPath())
-					if err != nil {
-						log.Warn("estimate binlog size wrong",
-							zap.Int64("segmentID", loadInfo.GetSegmentID()),
-							zap.String("binlog path", path.GetLogPath()),
-							zap.Error(err))
-						return 0, err
-					}
-				}
-				segmentSize += binlogSize
+			for _, binlog := range binlogPath.Binlogs {
+				segmentSize += binlog.GetLogSize()
 			}
 		}
 	}
diff --git a/internal/querycoord/cluster_test.go b/internal/querycoord/cluster_test.go
index f9fc9a05e8..9ea1d833dd 100644
--- a/internal/querycoord/cluster_test.go
+++ b/internal/querycoord/cluster_test.go
@@ -664,7 +664,7 @@ func TestEstimateSegmentSize(t *testing.T) {
 	binlog := []*datapb.FieldBinlog{
 		{
 			FieldID: simpleConstField.id,
-			Binlogs: []*datapb.Binlog{{LogPath: "^&^%*&%&&(*^*&"}},
+			Binlogs: []*datapb.Binlog{{LogPath: "by-dev/rand/path", LogSize: 1024}},
 		},
 	}
 
@@ -683,8 +683,8 @@ func TestEstimateSegmentSize(t *testing.T) {
 	}
 
 	size, err := estimateSegmentsSize(loadReq, dataKV)
-	assert.Error(t, err)
-	assert.Equal(t, int64(0), size)
+	assert.NoError(t, err)
+	assert.Equal(t, int64(1024), size)
 
 	binlog, err = saveSimpleBinLog(baseCtx, schema, dataKV)
 	assert.NoError(t, err)
@@ -693,7 +693,7 @@ func TestEstimateSegmentSize(t *testing.T) {
 
 	size, err = estimateSegmentsSize(loadReq, dataKV)
 	assert.NoError(t, err)
-	assert.NotEqual(t, int64(0), size)
+	assert.NotEqual(t, int64(1024), size)
 
 	indexPath, err := generateIndex(defaultSegmentID)
 	assert.NoError(t, err)