There should not be such a distinction between in-memory and disk based databases. Being in-memory does not make OLAP databases faster. And typically, "in-memo

There should not be such a distinction between in-memory and disk based databases. Being in-memory does not make OLAP databases faster. And typically, "in-memory" is a disadvantage and a limiting factor in OLAP database architecture. I have a presentation on this topic: https://presentations.clickhouse.com/meetup53/optimizations/ https://presentations.clickhouse.com/meetup53/optimizations/ It is similar to how frequently someone says "lock-free" to highlight imaginary performance advantages. If someone says a database engine is fast because it is in-memory and lock-free, it smells wrong.