diff --git a/cache.go b/cache.go
index c6821c393..8ae8caefc 100644
--- a/cache.go
+++ b/cache.go
@@ -40,10 +40,10 @@ type cache interface {
 	// Returns a list of all IDs.
 	IDs() []uint64
 
-	// Updates the cache, if necessary.
+	// Soft ask for the cache to be rebuilt - may not if it has been done recently.
 	Invalidate()
 
-	// Rebuilds the cache
+	// Rebuilds the cache.
 	Recalculate()
 
 	// Returns an ordered list of the top ranked bitmaps.
diff --git a/fragment.go b/fragment.go
index 827dda6e2..ef2a5bfab 100644
--- a/fragment.go
+++ b/fragment.go
@@ -1386,7 +1386,7 @@ func (f *fragment) bulkImport(rowIDs, columnIDs []uint64) error {
 		f.cache.BulkAdd(rowID, n)
 	}
 
-	f.cache.Invalidate()
+	f.cache.Recalculate()
 	return snapshot(f, results)
 }
 
@@ -1462,7 +1462,7 @@ func (f *fragment) importRoaringBytes(roaringBytes []byte) error {
 		n := bm.CountRange(rowID*ShardWidth, (rowID+1)*ShardWidth)
 		f.cache.BulkAdd(rowID, n)
 	}
-	f.cache.Invalidate()
+	f.cache.Recalculate()
 
 	err = snapshot(f, bm)
 	return err