Option to cache Prometheus response

[jesperpedersen]

Have an option that will cache a Prometheus response for X seconds

[fluca1978]

Just curious: do you mean avoid to send out the result of metrics_page() at every single request but to serve it as it was x seconds before?
Is such functon so heavy to serve that requires caching?
Could it be a static temporary file the solution? I mean write out metrics_page() to the file and serve such a file is still valid.

[jesperpedersen]

Prometheus requests are light-weight for pgagroal (and pgmoneta, but not for pgexporter).

I would just cache it as a static string, together with the last served timestamp.