Re: LDFX02 task - what is it?

[Lo <lorai@xxxxxxxxxxxxxx>]

Art Tostaine, Jr. wrote:
> 
> John Swartzendruber wrote:
> 
> > We have a 620-2180 running v4r1.  Normally response time is excellent, in 
>the .2
> > - .3 second range.  People get used to that, and let me know when it gets 
>worse
> > (sort of like an automatic performance monitoring tool, isn't that nice?).
> >
> > This morning when the 'alarm' went off, I did a quick look using WRKSYSACT, 
>and
> > found a system job/task called LDFX02 that was using about 50% of the CPU.  
>It
> > stayed around for somewhere between 10 and 15 minutes, then seemed to 
>disappear.
> > Can anyone share some knowledge about it does?
> >
> >  -- John
> > ----------------------------------------
> 
> That doesn't fit within "normal" system task names.  Most IBM objects starts 
>with a
> Q.  Sounds to me like a Fix program (LDFX).  That type of name makes my 
>"alarm" go
> off and think, some programmer didn't submit his job to batch ("I didn't 
>think it
> would take more than 5 seconds to run this job!")
> 
> --
> Art Tostaine, Jr.
> Creative Computer Associates, Inc.
> Parlin, NJ
> atostaine@crecomp.com
> 

LDFX02 is a background OS task responcible, among other things, for
CISC-to-RISC on-the-fly program conversion (recompilation) when a CISC
tape is restored on a RISC machine. Contrary to common belief QFRCCNVRST
setting does not affect the way programs are recompiled when
a tape saved on ANY system with TGRLS(*V3R1M0) or lower is restored on a
V3R6M0 or higher system. The advice is: don't restore this data from 
priority 20 jobs. LDFXxx in this case will have priority value 21, and
with dynamic priorities adjustment in place it's almost the same as 20.
Whenever I need to do that sort of restore, I lower my job's priority to
35.

Lo
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