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:
|Craig Kerstiens: Postgres 11 - A First Look|
|Álvaro Herrera: Partitioning Improvements in PostgreSQL 11|
|Craig Kerstiens: Use cases for followers (read replicas) in Postgres|
|Laurenz Albe: Correlation of PostgreSQL columns explained|
|Sebastian Insausti: Custom Graphs to Monitor your MySQL, MariaDB, MongoDB and PostgreSQL Systems -|
|Jonathan Katz: Why Covering Indexes Are Incredibly Helpful|
|brian davis: Cost of a Join - Part 2: Enums, Wider Tables|