On Fri, 27 Oct 2006 17:23:43 -0600, Paul Gilmartin <[EMAIL PROTECTED]> wrote:
> .... I tried various values >of REGION. z/OS 1.7 accepts "REGION=2096128K" but fails on >"REGION=2096129K" with > > IEF638I SPECIFIED NUMERIC EXCEEDS MAXIMUM ALLOWED IN THE REGION FIELD. > .... > >BTW, what's the rationale for the maximum of 2096128K? >2096129 = 0x1FFC01, and 2096129*1024 = 0x7FF00400, which fit >comfortably in 21-bit and 31-bit fields, respectively. It seems >to me that the reasonable choice of limit would be 2097151, since >2097151*1024 = 0x7FFFFC00, the largest multiple of 1024 that can >be represented in 31 bits (2097151 = 0x1FFFFF). A region value greater than 16M specifies the region above the line, while below the line storage is not constrained by the region paremeter. The largest possible region above the line would be 0x7f000000 or 2080768K. This of course ignores the space occupied by the extended Nucleus, ELPA, ECSA and ESQA. All of these reduce the available above the line region. Clearly, it's an error, but it's too large, not too small. Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
