private boolean shouldSendRequestWithoutConsideringMetrics() {
      if (routerConfig.routerAdaptiveOperationTrackerWaitingForResponse) {
        int parallelism = getCurrentParallelism();
        int successCount = getSuccessCount();
        int successTarget = getSuccessTarget();
        return inflightCount < parallelism && successCount + inflightCount < successTarget;
      } else {
        return inflightCount < getCurrentParallelism();
      }
    }
@return True when request should be sent even without considering metrics.
ambry-router/src/main/java/com/github/ambry/router/AdaptiveOperationTracker.java