Anybody using PostgreSQL with Drupal? I know MySQL is preferred for Drupal but I have an existing PostgreSQL instance running on the server. I might as well use it rather than use more resources by running MySQL (MariaDB) unless there are major drawbacks in using PostgreSQL.
So, how does running Drupal on MySQL compare to Drupal on PostgreSQL?
Also, are there differences between running Drupal on Oracle's MySQL vs MariaDB?