1 files changed, 3 insertions, 3 deletions
diff --git a/src/leveldb/util/arena.cc b/src/leveldb/util/arena.cc
index 9367f71492..74078213ee 100644
--- a/src/leveldb/util/arena.cc
+++ b/src/leveldb/util/arena.cc
@@ -9,8 +9,7 @@ namespace leveldb {
 
 static const int kBlockSize = 4096;
 
-Arena::Arena() {
-  blocks_memory_ = 0;
+Arena::Arena() : memory_usage_(0) {
   alloc_ptr_ = NULL;  // First allocation will allocate a block
   alloc_bytes_remaining_ = 0;
 }
@@ -60,8 +59,9 @@ char* Arena::AllocateAligned(size_t bytes) {
 
 char* Arena::AllocateNewBlock(size_t block_bytes) {
   char* result = new char[block_bytes];
-  blocks_memory_ += block_bytes;
   blocks_.push_back(result);
+  memory_usage_.NoBarrier_Store(
+      reinterpret_cast<void*>(MemoryUsage() + block_bytes + sizeof(char*)));
   return result;
 }