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:
|Jignesh Shah: PostgreSQL Extensions - A Deeper Look|
|Nawaz Ahmed: PostgreSQL Top Learning & Training Resources|
|Dave Conlin: Postgres Execution Plans — Field Glossary|
|Luca Ferrari: PostgreSQL 12 beta 4 up and running in less than six minutes|
|Laurenz Albe: Manage Linux control groups in PostgreSQL with pg_cgroups|
|pgCMH - Columbus, OH: PostgreSQL 12 A Dozen New Things|
|Hubert 'depesz' Lubaczewski: Waiting for PostgreSQL 13 – Support for FF1-FF6 and SSSS datetime forma|