Vacuum is a way bigger problem, if you have a few million updates per day on a 5TB table you are going to have a hard time keeping index and page bloat down. S

Vacuum is a way bigger problem, if you have a few million updates per day on a 5TB table you are going to have a hard time keeping index and page bloat down. Sure, if your tables are insert only you might be fine but doing any kind of DDL or maintenance (analyze after version upgrades) is going to ruin your day.