PostgreSQL 8.3 正式发布
新增特性包括：
* Heap Only Tuples
* BGWriter Autotuning
* Asynchronous Commit
* Spread Checkpoints
* Synchronous Scan
* "Var-Varlena"
* L2 Cache Protection
* Lazy XID
* CSV Logging
* SQL/XML
* MS Visual C++ support
* ENUMs
* Integrated Tsearch
* SSPI & GSSAPI
* Composite Type Arrays
* pg_standby
详细参考：
http://www.postgresql.org/about/press/features83.html
