x-pg: &pg
  environment: { POSTGRES_PASSWORD: test }
  tmpfs: [/var/lib/postgresql/data]
  command: >
    postgres -c fsync=off -c synchronous_commit=off
    -c full_page_writes=off -c max_connections=200
  healthcheck:
    test: ["CMD-SHELL", "pg_isready -U postgres"]
    interval: 1s
    retries: 30

services:
  pg14: { <<: *pg, image: "postgres:14", ports: ["54314:5432"] }
  pg15: { <<: *pg, image: "postgres:15", ports: ["54315:5432"] }
  pg16: { <<: *pg, image: "postgres:16", ports: ["54316:5432"] }
  pg17: { <<: *pg, image: "postgres:17", ports: ["54317:5432"] }