diff --git a/util/statistics.cc b/util/statistics.cc
index a850445edb..f86eb2c543 100644
--- a/util/statistics.cc
+++ b/util/statistics.cc
@@ -14,11 +14,9 @@ std::shared_ptr<Statistics> CreateDBStatistics() {
   return std::make_shared<StatisticsImpl>();
 }
 
-StatisticsImpl::StatisticsImpl() {
-  // Fill tickers_ with "zero". To ensure plasform indepedent, we used
-  // uint_fast64_t() instead literal `0` to represent zero.
-  std::fill(tickers_, tickers_ + TICKER_ENUM_MAX, uint_fast64_t());
-}
+StatisticsImpl::StatisticsImpl()
+    : tickers_(TICKER_ENUM_MAX),
+      histograms_(HISTOGRAM_ENUM_MAX) {}
 
 StatisticsImpl::~StatisticsImpl() {}
 
diff --git a/util/statistics.h b/util/statistics.h
index 36456dddc8..f598bdbf90 100644
--- a/util/statistics.h
+++ b/util/statistics.h
@@ -8,6 +8,9 @@
 #include "util/histogram.h"
 #include "util/mutexlock.h"
 
+#include <vector>
+#include <atomic>
+
 #define UNLIKELY(val) (__builtin_expect((val), 0))
 
 namespace rocksdb {
@@ -25,8 +28,8 @@ class StatisticsImpl : public Statistics {
                              HistogramData* const data);
 
  private:
-  std::atomic_uint_fast64_t tickers_[TICKER_ENUM_MAX];
-  HistogramImpl histograms_[HISTOGRAM_ENUM_MAX];
+  std::vector<std::atomic_uint_fast64_t> tickers_;
+  std::vector<HistogramImpl> histograms_;
 };
 
 // Utility functions