How to reduce kong heath check request sent to upstream?

Questions
1

Hi Guys,

I have configured Kong health check with “IP hash” algorithm. I have 2 upstream and configured health check as below

  healthchecks:
    active:
      concurrency: 1
      healthy:
        interval: 30
        successes: 1
      http_path: /v1/management/health/simple
      https_verify_certificate: false
      type: https
      unhealthy:
        http_failures: 1
        interval: 30
        tcp_failures: 1
        timeouts: 1
    passive:
      healthy:
        successes: 1
      unhealthy:
        http_failures: 1
        http_statuses:
          - 429
          - 500
          - 503
        tcp_failures: 1
        timeouts: 1

but it sends too many request (more than 50) to upstream within the internal. Is there anyway to control or reduce number of health check sent by Kong to upstream?. I am looking for way to set 1 health check request per upstream within “internal” time (30s).

Thank you