How can I reduce CPU usage in REXX program.

Mansik Kim · New User Joined: 15 Dec 2006 Posts: 29 Location: Korea

Hello,

I working REXX program read and calculation multi line(about 10million line).

This job used 30 min cpu time and 50 min elapsed time and
about 20% cpu used during job running.

I want to have solution for reduce cpu and elapsed time.

Please let me have.

Thanks,
Mansik.

Anuj Dhawan · Posted: Mon Sep 03, 2012 8:08 pm

Possibly, start by showing code snippet. Bit off topic but a "10million" is number of records the REXX work on or the number-of-code-lines in REXX? If it's later, possibly, just post the "calcualtion-part" from your REXX-code (and a TRACE)...

enrico-sorichetti · Posted: Mon Sep 03, 2012 8:22 pm

Anuj Dhawan · Posted: Mon Sep 03, 2012 8:35 pm

Thanks Enrico. Knowing REXX is not a good choice for "huge input", I was beaten up by

enrico-sorichetti · Posted: Mon Sep 03, 2012 8:37 pm

my bad I had forgot the

smiley

dick scherrer · Posted: Tue Sep 04, 2012 7:49 am

Hello,

The TS may have dissappeared . . .

enrico-sorichetti · Posted: Tue Sep 04, 2012 1:35 pm

the TS has this habit, I checked his other topics!
I deleted a few of them,where the TS asked, more info was requested, nothing was provided
( that' s why the <proof> is not there )

probably time to warn.

Marso · Posted: Tue Sep 04, 2012 8:38 pm

Nic Clouston · Posted: Tue Sep 04, 2012 11:13 pm

10,000,000 lines of input processed in 50 minutes by Rexx - that is pretty good going.

abhisingh · New User Joined: 26 Apr 2012 Posts: 10 Location: India

With my limited knowledge..

REXX is doing well what it is suppose to do..

Your code is of huge line count with various i/o that's why there is some performance issue. Better go for other powerful language for ur task.

Ed Goodman · Active Member Joined: 08 Jun 2011 Posts: 556 Location: USA

This REXX needs to be in a museum of sorts. It should be in the Hall of Bad Decisions that Made Sense at the Time.

My guess is that someone had a need, realized they could cobble a good REXX in a few hours, tested it with a few dozen lines of input. That saved them the hours of paperwork and meetings needed to get a real program integrated into the system.

Now, the REXX has consumed FAR more time and money than the real program PLUS the time and money needed to have gotten it implemented.

So to all the paperwork wonks out there: Take notice!