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by jupp0r 1108 days ago
> I'm not actually sure what bottleneck would motivate you need to scale beyond this configuration

It's usually not that data doesn't fit on one machine but that load on the database exceeds what one machine can serve. A failover configuration might enable you to use the spares for some read operations and take a little load of the primary, but you lose ACID semantics when you do that and it generally doesn't help you for long.