With the current implementation, when an unknown field (one that's not explicitly listed in the KNOWN_FIELDS slice) shows up in NGTOP_LOG_FORMAT, it will be ignored by the parser.

Provided that we don't want to do any special parsing of the field itself, or its derived fields, and we don't want to add cli aliases, we could rewrite the parser such that those unknown fields are taken as is and stored in a column with the same name as the log var. This would allow the tool to support other formats without code updates (and perhaps would allow to remove some of the more basic fields currently listed in KNOWN_FIELDS).