====== Oracle database upgrade ======

http://surachartopun.com/2011/09/upgrade-oracle-database-11202-to-11203.html

http://www.visma.dk/blog/upgrading-an-oracle-database-to-version-11-2-the-tricky-parts-that-i-didnt-expect/

http://www.dba-oracle.com/t_fix_hanging.htm

http://www.oracle.com/technetwork/database/upgrade/best-practices-for-upgrade-11gr2v3-1502927.pdf