update io stats for level-merge (#106)

* update io stats for level-merge
Signed-off-by: Connor1996 <zbk602423539@gmail.com>

src/table_builder.cc

@@ -89,6 +89,8 @@ void TitanTableBuilder::Add(const Slice& key, const Slice& value) {
       if (s.ok()) {
         std::string index_value;
         AddBlob(ikey.user_key, record.value, &index_value);
+        UpdateIOBytes(prev_bytes_read, prev_bytes_written, &io_bytes_read_,
+                      &io_bytes_written_);
         if (ok()) {
           std::string index_key;
           ikey.type = kTypeBlobIndex;

src/titan_stats.cc

@@ -81,9 +81,10 @@ const std::array<std::string,
 void TitanInternalStats::DumpAndResetInternalOpStats(LogBuffer* log_buffer) {
   constexpr double GB = 1.0 * 1024 * 1024 * 1024;
   constexpr double SECOND = 1.0 * 1000000;
-  LogToBuffer(log_buffer,
-              "OP           COUNT READ(GB)  WRITE(GB) IO_READ(GB) IO_WRITE(GB) "
-              " FILE_IN FILE_OUT");
+  LogToBuffer(
+      log_buffer,
+      "OP           COUNT READ(GB)  WRITE(GB) IO_READ(GB) IO_WRITE(GB) "
+      " FILE_IN FILE_OUT GC_SAMPLE(MICROS) GC_READ(MICROS) GC_UPDATE(MICROS)");
   LogToBuffer(log_buffer,
               "----------------------------------------------------------------"
               "-----------------");