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  1.  Home
  2. C400-L
  3. May 2011

Re: Write to IFS file - high CPU

Thanks Peter!
Changing Standard C functions to POSIX did make an improvement and as you
said the program finished much faster. The highest CPU percentage it reached
was 79% as opposed to 91%.
The internal buffer in Standard C functions was a real revelation to me. Any
other hidden gems out of your sleeve :)?
I'm just wondering... The program is doing multiple I/O operations.
Shouldn't an I/O operation release the CPU?


Jevgeni,
It's only a psychological problem until the operator puts the job on hold
because he thinks it's in infinite loop :)
Then it becomes a real problem, because the business unit thinks that other
business jobs will get less CPU.
There seems to be a consensus in this thread that high CPU is pretty much
normal. I'm just having hard time explaining it and I think I will be forced
to put the job in a different class with a lower runtime priority.
Thanks for the code. I'll definitely try it.



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