PostgreSQL is well-supported by its active community. There are more than a dozen mailing lists available, categorized into topics like:PostgreSQL User Groups all over the world, and there is also an active IRC & Slack community.
There are also links to international sites that contain PostgreSQL information in various languages.
People in the PostgreSQL community also contribute to:
|Bruce Momjian: When Does a Commit Happen?|
|Paul Ramsey: Spatial Constraints with PostGIS in PostgreSQL- Part 2|
|Hans-Juergen Schoenig: PostgreSQL: Speeding up recursive queries and hierarchic data|
|Martijn Wallet: Determine better indexing and partitioning with hypopg|
|Bruce Momjian: Lessons from the Online Conference Trenches|
|Andreas 'ads' Scherbaum: Markus Winand|
|Hamid Akhtar: Optimizing SQL: Simplifying Queries with Window Functions|