diff --git a/lib/storage/partition.go b/lib/storage/partition.go
index 56a30c8d8..8919e0dbe 100644
--- a/lib/storage/partition.go
+++ b/lib/storage/partition.go
@@ -367,11 +367,11 @@ func (pt *partition) UpdateMetrics(m *partitionMetrics) {
 
 	pt.partsLock.Unlock()
 
-	m.BigIndexBlocksCacheRequests += atomic.LoadUint64(&historicalBigIndexBlocksCacheRequests)
-	m.BigIndexBlocksCacheMisses += atomic.LoadUint64(&historicalBigIndexBlocksCacheMisses)
+	m.BigIndexBlocksCacheRequests = atomic.LoadUint64(&historicalBigIndexBlocksCacheRequests)
+	m.BigIndexBlocksCacheMisses = atomic.LoadUint64(&historicalBigIndexBlocksCacheMisses)
 
-	m.SmallIndexBlocksCacheRequests += atomic.LoadUint64(&historicalSmallIndexBlocksCacheRequests)
-	m.SmallIndexBlocksCacheMisses += atomic.LoadUint64(&historicalSmallIndexBlocksCacheMisses)
+	m.SmallIndexBlocksCacheRequests = atomic.LoadUint64(&historicalSmallIndexBlocksCacheRequests)
+	m.SmallIndexBlocksCacheMisses = atomic.LoadUint64(&historicalSmallIndexBlocksCacheMisses)
 
 	m.ActiveBigMerges += atomic.LoadUint64(&pt.activeBigMerges)
 	m.ActiveSmallMerges += atomic.LoadUint64(&pt.activeSmallMerges)