On Tue, 29 Jun 2010 16:07:33 +0200, Erik Janssen wrote: >Testing the changes I noticed when I log on to TSO the help >panel says that the maximum possible region size is 2096128. >This is 1 MB less than 2 GB, which would be 2097152. Can >somebody tell me why the max is not exactly 2GB?
Doesn't the TSO SIZE specification work the same way as the JCL REGION parameter? That is, a specification less than 16 MB allows the the specified region below the line (if available) and 32 MB above and a specification greater than 16 MB sets the above the line region. In any case, there is quite a bit of storage that you can never use as part of your region. The z/OS nucleus, LPA, CSA and SQA all limit the maximum available region for your TSO session. They add up to a lot more than 1 MB. You might only have about 1.5 GB available. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
