Here are some of my notes on upgrading your [url http://www.ora00600.com/wordpress/articles/oracle-10g-to-11g-upgrade-guide/]10g Oracle DB. They should help. Obviously you should also read the upgrade guide, too.
1. Patch set for 10.2.0.2.5 should be installed
2. Time version must be >= 4
3. Install the Oracle 11g on another ORACLE_HOME
Note: We cannot upgrade the existing Oracle Home, since 11g is not a patchset. We have to install 11g oracle home as a seperate ORACLE_HOME in parallel to 10g Oracle Home.
4. Recycle Bin Should off
5. Edit pfile
a) Remove *.background_dump_dest, *.core_dump_dest, *.user_dump_dest, db_file_name_convert, log_file_name_convert
b) Add the diagnostic_dest
*.diagnostic_dest=<<ORACLE_BASE/admin/drdivers/diagnostic>> (11g Base Directory)
c) Change *.compatible='10.2.0.1.0' to *.compatible=’11.1.0′
may be below link will helpful for you
Edited by: SANCHIT GUPTA on May 16, 2013 11:35 PM