Support for enabling non-default metric categories and defaults in a easier way

[lucassaldanha]

Currently, if I want to enable a non-default metric category, but keep all default metrics enabled, my only option is to use --metrics-categories=A,B,C,D,...,X (all default categories plus the non-default category I want to use).

It would be great if I had the option of just enabling all default categories + the extra non-default categories I want.

Something like:
teku --metrics-enabled --metrics-default-categories-enabled --metrics-categories=X

--metrics-default-categories-enabled default value is true.

Another idea:
teku --metrics-enabled --metrics-categories=DEFAULT,X
Using an "alias" for default metrics.

[benjaminion]

Currently our docs say that all categories are enabled by default. Is that not correct?

My preference would be for the --metrics-categories=DEFAULT,X version with the alias.

[lucassaldanha]

I have opened a PR to update our docs re non-default categories. Consensys/doc.teku#521