Currently there is no ability to specify TTL for separate health check.
Ex.: in my case "hc" validating against repository about 3-5 minutes therefore I couldn't specify TTL globally to not impact on other "hc" results. This "hc" I couldn't execute by scheduler to prevent CPU from high loading, also results for this check remains relevant for an 1-3 hours.
Therefore if it make sense not only for me I've added "pull request" for this functionality:
- If property "hc.ttl" specified within HC - it will be used as TTL for result, otherwise cache will use default TTL value