The BIG feature. The feature that made PostgreSQL leap from 8.4 to 9.0. Patch was written by Fujii Masao, and committed by Heikki Linnakangas on 15th of January 2010: Log Message: ----------- Introduce Streaming Replication.   This includes two new kinds of postmaster processes, walsenders ...

On 19th of December Simon Riggs committed a patch that will quite likely be the single most-talked-about change in PostgreSQL 8.5: Log Message: ----------- Allow read only connections during recovery, known as Hot Standby.   Enabled by recovery_connections = on (default) and forcing archive ...