Re: opnqry efficiency question

[Kevin Howcroft <kevinh@xxxxxxxxxxx>]

Hey.

One thing to be aware of, depending on your release.

I assume you are talking CPU seconds ??
If so, just remember that sometimes the 400 "charges" your job with the CPU 
time to execute a system task,
and sometimes it "charges" your job.

just my humble opinion.
kmh


At 03:12 PM 01/23/2001 -0600, you wrote:
>Hi all;
>
>I am not sure if I am from the old school or the new - here is my question;
>I have proved in one particular program my way is more efficient; however I
>am wondering
>which way is "truly" more efficient as my IS manager was "taught" one way,
>and I forget now if I was taught or just out of being a "control freak" in
>RPG and not
>wanting to relinquish anything to C/L that I code the way I do...
>
>He has always tried to do opnqry before the program call to trim down the
>data as far as he can before calling the program - I do not have faith in
>opnqry as I have seen
>it drop records it should not have (PTF's "probably fixed this) so I tend to
>just take the file as is and code for my selection criteria.
>
>In a test today running it his way took 39 seconds, my way took 17 seconds.
>
>Now I do not know if this would hold true in all instances..
>
>I guess I am wondering at a bare metal level, say you leave the key as is,
>but only put selection criteria in, does it matter...
>On the flip side, just how much system resources are "wasted" say for
>creating a opnqry over a file with a completely different key??
>
>Any thoughts??
>
>TIA
>
>Mark A. Manske
>[mailto:mmanske@minter-weisman.com]
>Sr. Project Lead
>Minter-Weisman
>
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