services:
  postgres:
    image: postgres:16
    container_name: postgres_db
    environment:
      POSTGRES_USER: ${POSTGRES_USER}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
      POSTGRES_DB: postgres
    ports:
      - "5432:5432"
    volumes:
      - postgres_data:/var/lib/postgresql/data
    # Note that some of the values below are very HW specific. You should 
    # absolutely adjust them to the available hardware where this will be 
    # running. This might help if you feel lost: 
    command: [
      "-c", "max_connections=XX",
      "-c", "shared_buffers=XGB",
      "-c", "effective_cache_size=XXXGB",
      "-c", "maintenance_work_mem=XXXMB",
      "-c", "checkpoint_completion_target=0.9",
      "-c", "wal_buffers=XXXMB",
      "-c", "default_statistics_target=XXX",
      "-c", "random_page_cost=1.1",
      "-c", "effective_io_concurrency=XXX",
      "-c", "work_mem=XXXkB",
      "-c", "huge_pages=off",
      "-c", "min_wal_size=XXXGB",
      "-c", "max_wal_size=XXXGB"
    ]
    restart: unless-stopped

volumes:
  postgres_data:
    driver: local