PostgreSQL 8.3.7 Documentation
Prev | Fast Backward | Chapter 31. Large Objects | Fast Forward | Next

# 31.1. Introduction

All large objects are placed in a single system table called `pg_largeobject`. PostgreSQL also supports a storage system called "TOAST" that automatically stores values larger than a single database page into a secondary storage area per table. This makes the large object facility partially obsolete. One remaining advantage of the large object facility is that it allows values up to 2 GB in size, whereas TOASTed fields can be at most 1 GB. Also, large objects can be randomly modified using a read/write API that is more efficient than performing such operations using TOAST.

Prev | Home | Next
Large Objects | Up | Implementation Features