diff --git a/db/db_impl.cc b/db/db_impl.cc
index 36afa1c..6b28260 100644
--- a/db/db_impl.cc
+++ b/db/db_impl.cc
@@ -1235,17 +1235,17 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* updates) {
   w.sync = options.sync;
   w.done = false;
 
-  uint64_t start_ = env_->NowMicros();
+  // uint64_t start_ = env_->NowMicros();
   MutexLock l(&mutex_);
-  count ++;
+  // count ++;
   writers_.push_back(&w);
   while (!w.done && &w != writers_.front()) {
     w.cv.Wait();
   }
   if (w.done) {
-    Waiting_elapsed += env_->NowMicros() - start_;
-    waited_count ++;
-    Total_elapsed += env_->NowMicros() - start_;
+    // Waiting_elapsed += env_->NowMicros() - start_;
+    // waited_count ++;
+    // Total_elapsed += env_->NowMicros() - start_;
     // dumpStatistics();
     return w.status;
   }
@@ -1265,7 +1265,7 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* updates) {
     // into mem_.
     {
       mutex_.Unlock();
-      uint64_t start_write = env_->NowMicros();
+      // uint64_t start_write = env_->NowMicros();
       status = log_->AddRecord(WriteBatchInternal::Contents(write_batch));
       bool sync_error = false;
       if (status.ok() && options.sync) {
@@ -1277,8 +1277,8 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* updates) {
       if (status.ok()) {
         status = WriteBatchInternal::InsertInto(write_batch, mem_);
       }
-      BatchSize += write_batch->ApproximateSize();
-      write_elapsed += env_->NowMicros() - start_write;
+      // BatchSize += write_batch->ApproximateSize();
+      // write_elapsed += env_->NowMicros() - start_write;
       mutex_.Lock();
       if (sync_error) {
         // The state of the log file is indeterminate: the log record we
@@ -1307,9 +1307,9 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* updates) {
   if (!writers_.empty()) {
     writers_.front()->cv.Signal();
   }
-  Total_elapsed += env_->NowMicros() - start_;
-  NoWaiting_elapsed += env_->NowMicros() - start_;
-  Nowaited_count ++;
+  // Total_elapsed += env_->NowMicros() - start_;
+  // NoWaiting_elapsed += env_->NowMicros() - start_;
+  // Nowaited_count ++;
   // dumpStatistics();
   return status;
 }
diff --git a/db/db_impl.h b/db/db_impl.h
index 0d77e55..241125e 100644
--- a/db/db_impl.h
+++ b/db/db_impl.h
@@ -214,32 +214,32 @@ class DBImpl : public DB {
 
   CompactionStats stats_[config::kNumLevels] GUARDED_BY(mutex_);
 
-  int count = 0;
-  int waited_count = 0;
-  int Nowaited_count = 0;
-  uint64_t Total_elapsed = 0;
-  uint64_t Waiting_elapsed = 0;
-  uint64_t NoWaiting_elapsed = 0;
-  uint64_t write_elapsed = 0;
-  uint64_t BatchSize = 0;
-  const double MB = 1024 * 1024;
-  const double KB = 1024;
-  inline void dumpStatistics() {
-    if(count && count % 500000 == 0) {
-      printf("==================================\n");
-      printf("Count: Total:%d    Waited:%d    Nowaited:%d\n",count,waited_count,Nowaited_count);
-      printf("%ld %ld %ld\n",Total_elapsed,Waiting_elapsed,NoWaiting_elapsed);
-      printf("Average Total elapsed:   %lf ms\n",Total_elapsed * 1.0 / count);
-      printf("Average Waiting elapsed: %lf ms\n",Waiting_elapsed * 1.0 / count);
-      printf("For waiting request:     %lf ms\n",Waiting_elapsed * 1.0 / waited_count);
-      printf("For Nowait request:      %lf ms\n",NoWaiting_elapsed * 1.0 / Nowaited_count);
-      printf("Write elapsed:           %lf ms\n",write_elapsed * 1.0 / Nowaited_count);
-      printf("Average BatchSize:       %lfKB\n",BatchSize / KB / count);
-      printf("Average BatchSize per write:%lfKB\n",BatchSize / KB / Nowaited_count);
-      printf("==================================\n");
-      std::fflush(stdout);
-    }
-  }
+  // int count = 0;
+  // int waited_count = 0;
+  // int Nowaited_count = 0;
+  // uint64_t Total_elapsed = 0;
+  // uint64_t Waiting_elapsed = 0;
+  // uint64_t NoWaiting_elapsed = 0;
+  // uint64_t write_elapsed = 0;
+  // uint64_t BatchSize = 0;
+  // const double MB = 1024 * 1024;
+  // const double KB = 1024;
+  // inline void dumpStatistics() {
+  //   if(count && count % 500000 == 0) {
+  //     printf("==================================\n");
+  //     printf("Count: Total:%d    Waited:%d    Nowaited:%d\n",count,waited_count,Nowaited_count);
+  //     printf("%ld %ld %ld\n",Total_elapsed,Waiting_elapsed,NoWaiting_elapsed);
+  //     printf("Average Total elapsed:   %lf ms\n",Total_elapsed * 1.0 / count);
+  //     printf("Average Waiting elapsed: %lf ms\n",Waiting_elapsed * 1.0 / count);
+  //     printf("For waiting request:     %lf ms\n",Waiting_elapsed * 1.0 / waited_count);
+  //     printf("For Nowait request:      %lf ms\n",NoWaiting_elapsed * 1.0 / Nowaited_count);
+  //     printf("Write elapsed:           %lf ms\n",write_elapsed * 1.0 / Nowaited_count);
+  //     printf("Average BatchSize:       %lfKB\n",BatchSize / KB / count);
+  //     printf("Average BatchSize per write:%lfKB\n",BatchSize / KB / Nowaited_count);
+  //     printf("==================================\n");
+  //     std::fflush(stdout);
+  //   }
+  // }
 };
 
 // Sanitize db options.  The caller should delete result.info_log if