Topic

PostgreSQL MVCC

PostgreSQL's multiversion concurrency control, in which an update writes a new tuple version and leaves the old one visible to older snapshots until cleanup removes it.

Current clusters

build1 publisher

Ordinary reads prune Postgres heap pages with autovacuum switched off

Franck Pachot's page-level demo disables autovacuum, updates one row eight ways, and shows hint bits, opportunistic pruning and LP_DEAD marks doing cleanup that the chain-walking model of MVCC credits to vacuum alone.

Publishers:dev.to

Reality

Evidence52
Adoption: Insufficient
Hype gap+28
Incentives15
Confidence46