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I'm not sure if this is an RPG issue or not, so I plan to cross-post it.

I have an RPGLE program that reads a DDM file (Input Primary) and outputs (write/update) to a local DB file. This has been working fine for over a year. Now I need data from a second DDM file (same location), so I added a chain to that file in the program.
Here's the problem - before, the job took a total of around 35 minutes. Now, simply adding a chain to a 2nd DDM file has increased the run time to almost 3 hours.

How can adding a single chain to another DDM file increase run time 5x ?

One DDM good, two DDM bad?

I'm also going to post this in Midrange in case it's not an RPG issue. (Sorry David, I'm not sure.)

Thanks.

~TA~


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