inc() seems to go up by 2 about prometheus_client HOT 3 CLOSED

I haven't looked into your code, but one idea that I have: Are you using a browser and maybe the browser is performing two calls? Favicon? Options request? But I can try to have a look later today.

from prometheus_client.

You are quite right. When I do a curl from the command line the counter increments by 1! How do I avoid this problem in production, or does prometheus sort that out?

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It depends, you will probably not have a counter for the metrics endpoint and the metrics endpoint would be called/scraped by prometheus.

For other endpoints you could make sure to exclude favicons / OPTIONS requests. But it depends if you want to know about them or not. They can also generate load / errors.

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