Batch programs and strategies:
For details on writing batch programs, using threads for performance improvements, and other batch-related information, see the Batch Best Practices whitepaper available on the My Oracle Support (MOS) Knowledge Base (article 836362.1).
Hiberate Fetching Strategies:
https://docs.jboss.org/hibernate/orm/4.3/manual/en-US/html/ch20.html
Yourkit Profiling Demo: