Platform : Linux 64 Bit.
How to improve the performance of the application and database.
Please suggest the documents for improving the performance.
In which area's I need to concentrate to improve the performance
You need to identify which part of the application/database is slow and needs to be tuned.
Please see previous threads for performance tuning docs you need to refer to -- https://forums.oracle.com/search.jspa?&q=Performance+Tuning+EBS