If health check is closed, requests may be distributed to unhealthy ECS instances, which can lead to service interruption. In general, we do not recommend closing health check.

Background information

You can only close health check for HTTP and HTTPS listeners. The health check of UDP and TCP listeners cannot be closed.


  1. Log on to the SLB console.
  2. On the Instances page, click the ID of the target instance.
  3. In the left-side navigation pane, click Listeners.
  4. On the Listeners page, click Configure next to the target listener.
  5. In the Configure Listener dialog box, click Next.
  6. Toggle the Activate health check switch to Disable.