diff --git a/storage/metric/processor.go b/storage/metric/processor.go
index 5031c2292d..8cc1bc8a9e 100644
--- a/storage/metric/processor.go
+++ b/storage/metric/processor.go
@@ -45,7 +45,7 @@ type processor interface {
 }
 
 // compactionProcessor combines sparse values in the database together such
-// that at least MinimumGroupSize is fulfilled from the
+// that at least MinimumGroupSize-sized chunks are grouped together.
 type compactionProcessor struct {
 	// MaximumMutationPoolBatch represents approximately the largest pending
 	// batch of mutation operations for the database before pausing to