diff --git a/tsdb/head_wal.go b/tsdb/head_wal.go
index 21cd285ec..dc2aa705f 100644
--- a/tsdb/head_wal.go
+++ b/tsdb/head_wal.go
@@ -496,8 +496,8 @@ func (h *Head) resetSeriesWithMMappedChunks(mSeries *memSeries, mmc, oooMmc []*m
 	}
 
 	h.metrics.chunksCreated.Add(float64(len(mmc) + len(oooMmc)))
-	h.metrics.chunksRemoved.Add(float64(len(mSeries.mmappedChunks)))                   /// + len(mSeries.ooo.oooMmappedChunks)))
-	h.metrics.chunks.Add(float64(len(mmc) + len(oooMmc) - len(mSeries.mmappedChunks))) /// - len(mSeries.ooo.oooMmappedChunks)))
+	h.metrics.chunksRemoved.Add(float64(len(mSeries.mmappedChunks)))
+	h.metrics.chunks.Add(float64(len(mmc) + len(oooMmc) - len(mSeries.mmappedChunks)))
 	mSeries.mmappedChunks = mmc
 	mSeries.ooo = nil
 	if len(oooMmc) == 0 {