Up through version 7.0, Postgres had serious problems with memory leakage

during large queries that process a lot of pass-by-reference data. There

was no provision for recycling memory until end of query. This needed to be

fixed, even more so with the advent of TOAST whichwill allowedvery large

chunksof data to be passed around in the system. This document describes

the newmemory management system implemented in 7.1.

fixed, even more so with the advent of TOAST whichallowsvery large chunks

of data to be passed around in the system. This document describes the new

memory management system implemented in 7.1.

Background