| PostgreSQL 8.3.23 Documentation | ||||
|---|---|---|---|---|
| Prev | Fast Backward | Chapter 31. Large Objects | Fast Forward | Next |
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.