Yes I didn’t mean completely wasted, just feels to me that this requires a huge effort and is a risk to Postgres’s legendary reliability - for a relatively small gain, especially considering that ssd storage capacity will continue to increase dramatically and plummet in price. Would be better I think to prepare for new paradigm of unified immutable memory coming v soon, (Optane already shipping) which will enable Postgres to compete with ‘in memory, databases like SAP Hanna