Of course that's up to you, but for every ARCH step you decrement you're leaving compiler optimizations behind on the cutting room floor. For example, if you're shipping an ARCH(5) build (z900/z800 compatible) to a customer that can run ARCH(11) (z13/z13s), you're leaving about a decade and a half of compiler optimizations and associated performance improvements behind.
You can recover *some* of those compiler optimizations if you use the TUNE parameter appropriately. How much these optimizations matter depends on the nature and real world usage of your product. -------------------------------------------------------------------------------------------------------- Timothy Sipples IT Architect Executive, Industry Solutions, IBM z Systems, AP/GCG/MEA E-Mail: sipp...@sg.ibm.com ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
