Re: Different processing times...why?

[Pete Massiello <pmassiello@xxxxxxxxxxxxxxxx>]

At first, it sounded like the rebuild access path was set to *RLDBLD
meaning when the file was opened, but when you said after keeting the
session idle for 20 minutes, the results go back, it could not be the
access path .  When you say idle, I assume you mean you are not signing
off, just the session does nothing for 20 minutes.  Could it be that the
pages that the records are on, are remaining in memory after the first
time you execute the program, so when you make the succeeding calls, the
program isn't doing any disk I/O, rather its reading the records while
in memory.  After 20 minutes or so, you have enough activity that the
pages that these records are in, are paged out of memory?

    Pete Massiello

Ray Nainy wrote:

> We have an RPG program that reads approximately 4500 records from
> file A and reads matching records in file B using account number.
> File B has a total of 2 million records.
> It takes about 60 to 70 seconds to complete the processing when the
> program
> is called for the first time. But it takes only 3 to 4 seconds to
> complete
> the processing, when the program is called again 2nd or 3rd or 4th or
> 5th...time. Processing time is 60 to 70 seconds only for the first call.
> This happens again if the session is idle for 20 minutes or more. We
> couldn't find out why is this processing time more only for the first
> call
> to the RPG program. We verified and found that this problem exist
> anytime, irrespective of the peak/non-peak hours of the day.
>
> Any help is greatly appreciated.
>
> Ray
>
>
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