Dan Shea <dan.shea@ec.gc.ca> writes:
> You make it sound so easy. Our database size is at 308 GB.
Well, if you can't update major versions that's understandable; that's
why we're still maintaining the old branches. But there is no excuse
for not running a reasonably recent sub-release within your branch.
Read the release notes, and consider what you will say if one of the
several data-loss-causing bugs that were fixed long ago eats your DB:
http://developer.postgresql.org/pgdocs/postgres/release.html
regards, tom lane