Re: Multi-processor machines.

[PaulMmn <PaulMmn@xxxxxxxxxxxxx>]

Bob Larkin wrote (in part):

>The big question is ... Why does this job take so long?!?!?
>Improper design can cause a problem, but often very small changes can
>make a BIG difference. Just this week, I wrote a program wiith less then
>ten lines of executable code (COBOL). This program was added to the job
>stream of a job that ran 11 HOURS (660 minutes). The run time was
>reduced to 17 MINUTES. Rather dramatic :)
>Problem was that a RPG program was calling a COBOL program repeatedly.
>Due to the way the system handles program initiation/termination , a
>COBOL program encapsulating the process eliminated a BUNCH of overhead.
>One client regularly process 80 Million transaction batch jobs with
>heavy computation. Performance is greatly enhanced with the use of the
>Caching available through the system.



We've had a COBOL program at the top of our batch subsystems for years:  it
just does a CALL QCMD and ends.  This ensures that there's -always- a COBOL
program at the top of the invocation stack, which prevents problems with
RPG calling COBOL not ending properly because there's no COBOL at the top.

--Paul E Musselman
PaulMmn@ix.netcom.com


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