- scalability
  - what is it
    - do more work
      - by employing more resources
      - using resources more efficiently
  - vertical/horizontal
  - why is vertical scalability important
  - database as the point of consistency
- why do you want to scale vertical as long as possible
  - much cheaper to develop for
  - less effort to maintain
  - often much faster than scaling horizontally
- but why not longer than that
  - hardware costs go up
  - there's definitely a ceiling somewhere
  - latency across long distances
  - optimization (your software, used software) becomes more and more important
    - expensive
- mixing horizontal and vertical scalability makes sense
- what were common scalability problems in postgres
- what are remaining problems / what can you do about them
- parallelism
- we need your help
  - problem reports, profiles, etc
  - contributions
- where to look if you need to scale horizontally
  - operational
  - analytics
  - ...