I know that someone has already given one of these references, but the two places that I would start (given the information you have provided in the thread) are:
The Performance tuning paper (which "application programmers can EASILY read and understand) at: http://www-1.ibm.com/support/docview.wss?rs=203&q=7001475&uid=swg27001475 And the section "Improving VSAM performance" of the Programming Guide at: http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/igy3pg31/1.10.7 You should be aware that the latter SAYS that normally a "systems programmer" will help (or do) the tuning for VSAM, but I still think that application programmers can get a lot out of that section. "McKown, John" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>... > I'm feeling under the weather today and our zSeries is pegged at 100%, > so I thought I'd ask a curiousity question here. I hope you don't mind. > > I have never considered COBOL to be a language which would normally be > used to write a program which would cause high CPU utilization (as in > percentage). But I've noticed lately that many of our batch COBOL > programs can run our z890 (capacity 250) at over 20% CPU as shown by > SDSF. And I don't mean just a spike now and then, but for minutes at a > time. Does this seem weird to anybody else? I am afraid that it likely > means that the COBOL code is not written very well, but we don't have > anything like Strobe (which we "threw out" due to cost during the > previous management cycle), so I cannot be sure. Oh, and we won't likely > get anything to replace it because the programmers refuse to use it > anyway. They're too busy (and they are). > > Well, since I can't do anything about it anyway, it is just a talking > point. > > -- > John McKown > Senior Systems Programmer > HealthMarkets > Keeping the Promise of Affordable Coverage > Administrative Services Group > Information Technology ---------------------------------------------------------------------- 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
