diff --git a/lib/mergeset/table.go b/lib/mergeset/table.go
index ddd0bac40..ba12ada94 100644
--- a/lib/mergeset/table.go
+++ b/lib/mergeset/table.go
@@ -965,7 +965,7 @@ func (tb *Table) mergeParts(pws []*partWrapper, stopCh <-chan struct{}, isOuterP
 	}
 
 	d := time.Since(startTime)
-	if d > 10*time.Second {
+	if d > 30*time.Second {
 		logger.Infof("merged %d items across %d blocks in %.3f seconds at %d items/sec to %q; sizeBytes: %d",
 			outItemsCount, outBlocksCount, d.Seconds(), int(float64(outItemsCount)/d.Seconds()), dstPartPath, newPSize)
 	}
diff --git a/lib/storage/partition.go b/lib/storage/partition.go
index 7a6327f64..9b5118737 100644
--- a/lib/storage/partition.go
+++ b/lib/storage/partition.go
@@ -1255,7 +1255,7 @@ func (pt *partition) mergeParts(pws []*partWrapper, stopCh <-chan struct{}) erro
 	}
 
 	d := time.Since(startTime)
-	if d > 10*time.Second {
+	if d > 30*time.Second {
 		logger.Infof("merged %d rows across %d blocks in %.3f seconds at %d rows/sec to %q; sizeBytes: %d",
 			outRowsCount, outBlocksCount, d.Seconds(), int(float64(outRowsCount)/d.Seconds()), dstPartPath, newPSize)
 	}