NOTE: pg_stat_bgwriter counter metrics had the _total suffix added #556
- [CHANGE] refactor pg_stat_bgwriter metrics into standalone collector #556
- [FEATURE] Add pg_database collector #613
- [ENHANCEMENT] Add pg_database_size_bytes metric #613
- [BUGFIX] Avoid parsing error from bogus Azure Flexible Server custom GUC #587
- [BUGFIX] Fix pg_stat_archiver error in 9.4 and earlier. #599
- [BUGFIX] Sanitize setting values because of Aurora irregularity #620