[#661] blobovnicza: Compute size with record size

To get more accurate size of blobovnicza use record
size (lenght of key + lenght of data).

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/local_object_storage/blobovnicza/control.go

@@ -116,10 +116,11 @@ func (b *Blobovnicza) initializeCounters() error {
 		}
 
 		return b.iterateAllDataBuckets(tx, func(lower, upper uint64, b *bbolt.Bucket) (bool, error) {
-			keysN := uint64(b.Stats().KeyN)
-			size += keysN * upper
-			items += keysN
-			return false, nil
+			return false, b.ForEach(func(k, v []byte) error {
+				size += uint64(len(k) + len(v))
+				items++
+				return nil
+			})
 		})
 	})
 	if err != nil {