> Granted, most webapps probably don't have enough users to trigger them too often It isn't purely a matter of number of users. You can have a billion users, b

> Granted, most webapps probably don't have enough users to trigger them too often It isn't purely a matter of number of users. You can have a billion users, but if your access pattern is embarrassingly isolated you are still probably okay. (And sharding is going to work great to boot.)