Hi list, I got a resolution for this compile-time issue yesterday and installed it on my sandbox this morning. PTF UI81630 (the July accum maintenance) has the fix in it. After installing the fix, the 3 INITCHECK options perform in essentially the same amount of resources. TCB time for the INITCHECK(LAX) as well as STRICT dropped by 90%, back to the roughly 54 CPU seconds.
Thank you, IBM Cobol team for sticking with it and fixing the issue. Rex -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Pommier, Rex Sent: Wednesday, May 4, 2022 11:23 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: [EXTERNAL] I knew Cobol 6.3 takes more resources to compile than 4.2 but should I be concerned about how much? Hi list, I have an update on this issue. I opened a ticket with IBM and I'm thinking they are thinking there may be an issue with the compiler because they're still looking at it to see if the CPU time can be improved. As I said earlier, we have multiple programs and at this point only 1 of them is behaving this bad. Going from .3 TCB seconds under Cobol 4.2 to 520 TCB seconds under 6.3 seems more than a bit excessive. IBM came back to me with a response stating that the INITCHECK compiler option is the culprit. We have this option set at INITCHECK(LAX) across the board and it normally doesn't cause heartburn - except in this one program. I compiled the program with NOINITCHECK and the TCB time dropped by almost 90%, from 520 seconds to 54. Paging disappeared as storage requirements dropped by close to 95%. Thank you to IBM for finding the problem as well as continuing to look to see if there is in fact a problem with the compiler. Thank you also to the IBM-Main soldiers who are willing to lend a hand when this type of weird thing crops up. More to come. Rex -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Pommier, Rex Sent: Monday, April 18, 2022 3:18 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: [EXTERNAL] I knew Cobol 6.3 takes more resources to compile than 4.2 but should I be concerned about how much? Hi list, Should I be concerned about the amount of resources Cobol 6.3 is occasionally using as compared to 4.2? I have one particular example that was brought to our attention due to the fact that we ran out of page space in our small shop. I finally got it to compile after tripling my page space. It is a CICS program and is only 11270 lines long. I am compiling with Expediter, but have optimization(0) configured so there is no additional compile-time processing being done to optimize the load module. I removed Expediter and still had the issues. Here are my comparisons. Has anybody else seen this kind of huge increase? Cobol42 without Expediter TCB .00499 minutes wall clock 2 seconds paging 0 serv 14956 Cobol42 with Expediter TCB .0138 minutes wall clock 2 seconds paging 0 serv 39158 Cobol63 without Expediter TCB 8.665 minutes wall clock 31 minutes paging 3185K serv 23,371,699 Cobol63 with Expediter TCB 8.519 minutes wall clock 23 minutes paging 4522K serv 22,980,890 I will be opening a ticket with IBM but was wondering if anybody else has seen this kind of spike. I have only seen this on one program and I have had my developers compile hundreds of programs. I've seen CPU and wall clock time increases but nothing like this. Obviously wall clock time is so variable due to other tasks running, I just included it to show the drastic increase. 2 seconds to 23-31 minutes is insane. Thanks, Rex ---------------------------------------------------------------------- The information contained in this message is confidential, protected from disclosure and may be legally privileged. If the reader of this message is not the intended recipient or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any disclosure, distribution, copying, or any action taken or action omitted in reliance on it, is strictly prohibited and may be unlawful. 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