> Please let me know any source where i can get more books on PG, I am
> especially looking for books on PG internals, architecture, Backup &
> Recovery and HA.
I'm afraid that you have to rely on the primary docs for now. The books
which are out are a bit old (version 8.0 and 8.1) and do not cover
internals.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com