protected int getRequestQueueSize() {
    int requestQueueSize = 0;
    for (AsyncRequestWorker asyncRequestWorker : asyncRequestWorkers) {
      requestQueueSize += asyncRequestWorker.getRequestQueueSize();
    }
    return requestQueueSize;
  }
Gets total number of requests waiting to be processed in all workers.
@return total size of request queue across all workers.
ambry-rest/src/main/java/com/github/ambry/rest/AsyncRequestResponseHandler.java