<snip> The real question is when the COMMON/PRIVATE boundary gets set. IODF must be read and digested very early in IPL, certainly before SYS1.PARMLIB is opened. By the time IEASYSxx is processed, do below-the-line UCBs figure into the boundary calculation? <end-snip>
It works something like this: -- Load the nucleus. Thus we have a definition for where that starts and ends. -- Build things such as UCB's that require common storage (think of that as initial SQA) -- Read system parameters to see the definitions of SQA, CSA -- Now determine the boundary of SQA (multiple of 64K?) based on the initial SQA and the SQA specification -- Now build LPA -- Use the LPA boundaries and the CSA size to define the CSA boundaries (1M multiple?) -- That is when the Common/Private boundary is set Any differences in the "earlier" areas can affect the Common/Private boundary. I seem to recall (but might be wrong) that one of the VSM health checks reports on how close you are to the point where you will lose 1M of private. 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
