The boundary between PVT/CSA and ECSA/EPVT is a 1-M boundary. A tiny change in nucleus, LPA, CSA allocation, SQA allocation can result in reduction of PVT size by 1M.
Health check VSM_CSA_CHANGE can provide useful information about how close to the "tipping point" you are. Did you look at that check in 2.3, for example? And even if you can't necessarily have it compare 2.3 results to 2.4 results (maybe you can, I'm not sure) you can compare the information it provides. Here's a tidbit from the description: "...helpful in determining when the module growth in LPA or the nucleus could reduce the size of the private area." Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
