message: Fixed number of worker thread
diff: @@ -24,8 +24,6 @@ DEFINE_bool(accept_log_append_during_pulling, false,
  "Whether to accept new logs during pulling the snapshot");
  DEFINE_uint32(heartbeat_interval, 5,
  "Seconds between each heartbeat");
  -DEFINE_uint32(num_worker_threads, 4,
  - "The number of threads in the shared worker thread pool");
  DEFINE_uint32(max_batch_size, 256, "The max number of logs in a batch");
  