public void pageRequested(final int pageSize,
                            final long requestStartedAtNs) {
    totalBytesRequested.addAndGet(pageSize);
    totalPagesRequested.incrementAndGet();
    if (MEASURE_TIMESTAMPS) {
      totalPagesRequestsNs.addAndGet(System.nanoTime() - requestStartedAtNs);
    }
  }
public void pageRequested(final int pageSize,
                            final long requestStartedAtNs)