The JRE was designed to perform optimally on UNIX systems, where each process is given large quotas by default. On OpenVMS, the default behavior gives each process lower quotas so that many processes can co-exist on a system.
To get the best Java performance on OpenVMS, HP recommends that you set process quotas to match a typical UNIX system. HP also recommends these as minimum quota settings (except where noted). See these recommendations at:
http://h18012.www1.hp.com/java/documentation/1.4.2/ovms/docs/user_guide.html
To check if your current process quotas fulfill the recommendations, you can run the following process: IBMDSCLI$JRE:[LIB]Java$Check_Environment.com.