Report Performance issues during initial load

Hi All,

We have deployed a set of PRPT reports, which have a number of prompts. These prompts have a lot of data (about 10k+ records each),which are used for type ahead / search ahead lookups.

When the report is opened, the data for the prompts are built for caching in each session.This increases initial load time and also causes performance issues as the user base increases. Can you please provide inputs regarding:
- Are there any configurations which can be set for the cache or engine, by which we can control this behaviour
- What are the best practices we can follow in this scenario (PRPT development,deployment, engine configuration)

Our environment is as below. All other settings are default (cache, etc)
- OS: RHEL 6.3
- BA Server:4.8.1
- JVM Allocated:4 GB

Thanks,
Vinod