release of PostgreSQL 9.5.

This release adds UPSERT capability, Row Level Security,
and multiple Big Data features, which will broaden the
user base for the world's most advanced database.
With these new capabilities, PostgreSQL will be
the best choice for even more applications for startups,
large corporations, and government agencies.

Release Notes:
http://www.postgresql.org/docs/current/static/release-9-5.html

What's New in 9.5:
https://wiki.postgresql.org/wiki/What%27s_new_in_PostgreSQL_9.5