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:
|Pavel Stehule: new bugfix release of plpgsql_check|
|Luca Ferrari: A glance at pg_cron to automatically schedule database tasks|
|Dave Conlin: Multi-column indexes|
|pgCMH - Columbus, OH: Users, Roles, and Permissions|
|Stefan Fercot: Back from PGDay Belgium|
|Pavel Stehule: how to don't emulate schema (global) variables|
|Paul Ramsey: Keynote @ FOSS4G NA 2019|