It hasn't changed much. But new OLAP features have come up such as parallel queries and for those, the existing cache architecture doesn't make sense since OLAP

It hasn't changed much. But new OLAP features have come up such as parallel queries and for those, the existing cache architecture doesn't make sense since OLAP is full of sequential scans. You can read the doc for the same - https://www.postgresql.org/docs/10/static/when-can-parallel-query-be-used.html https://www.postgresql.org/docs/10/static/when-can-parallel-...