Prometheus filtering request

[kys1230]

I want to press httpcode and request_time filters out the correct requests. For example, sum (httpcode = 200 and request_time < 200ms) / total_request to calculate availability. How should I configure it?

http{
  ...
  vhost_traffic_status_zone;
  vhost_traffic_status_histogram_buckets .1 .5 1 2;
  
  server {
      listen   9110;
      location /status {
          vhost_traffic_status_display;
          vhost_traffic_status_display_format prometheus;
      }
  }
}