Is the new Drupal 8 supported/certified by the Drupal community to run on PostgreSQL?
This is the top hit,
I don't really know what that means here in the Open Source part as the majority of support is MySQL (or so it appears).
it works and its even blazing fast.
drupal core 8.3.7 postgresql 9.6.3 amp stack - XAMPP
drupal case to follow on postgres drupal integration https://www.drupal.org/node/2564307
Did you not read the issue thread? or the last comment? Which links to https://www.drupal.org/node/2564307 and says:
As of September 2015 we have all tests passing the PostgreSQL CI bot (yay!). However, there are still some open issues around that should be fixed in terms of performance, security and for contrib land.
Drupal 8 Core will likely support PG. But, contrib modules typically use vendor specific SQL for complicated queries -- so per-module support will likely continue to be spotty.