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Frequently Asked Questions

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The questions covered in this section (FAQs 1) are:

1. Is it easy to install or uninstall MAX400?
2. What is CFINT?
3. Where can I see CFINT?  Is it on all machines?
4. Will MAX400 decrease the performance of other jobs?
5. What was/is the difference between Fast400 and MAX400?
 6. Does MAX400 modify IBM Licensed Internal Code?
7. Is there technical support for MAX400?

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1. Is it easy to install or uninstall MAX400?

MAX400 takes less than 5 minutes to install and run: RSTLIB, that is all. Like any other programs on the AS400 (iSeries) their jobs can be stopped, and the MAX400 libraries and objects can be removed as desired, leaving no trace.

2. What is CFINT?

CFINT is an internal system task used to handle job interrupts.  On server models it is also used as a governor to slow interactive performance down to set levels.  There is a task for each processor which displays as CFINT01, CFINT02, etc.

3. Where can I see CFINT?  Is it on all machines?

All normal active jobs can be seen with WRKACTJOB, but tasks can only be seen with WRKSYSACT and also Operations Navigator (i.e. iSeries Navigator) via Management Central. All machines have CFINT, although it consumes different amounts in different models.

4. Will MAX400 decrease the performance of other jobs?

MAX400 does not interfere with the performance of non-interactive jobs. The aim is to let the interactive jobs consume the CPU they need within the total CPW capacity for that AS/400. MAX400 consumes very little CPU, usually less than 1%. MAX400 will not interfere with any other processes, monitoring, data bases, etc.. on the AS400/iseries.

5. What was/is the difference between Fast400 and MAX400?

MAX400 is better than Fast400: Fast400 was not as effective in increasing interactive performance as MAX400.......Why do we say this? The reason is there is more than one interactive governor inside the operating system.  Fast400 only dealt with CFINT which meant that it didn't fully speed up the interactive jobs, i.e. the jobs ran a bit faster but still got less than 100% Interactive CPW. MAX400 manages  all interactive governors, carefully and efficiently allowing interactive jobs to get the same CPU as a batch job.

6. Does MAX400 modify IBM Licensed Internal Code?

Max400 does not modify IBM Licensed Internal Code. After you test/preview MAX400, simply end the MAX400 job and all MAX400 tuning work will end. To uninstall the product, simply delete the library. If you IPL your machine, and you wish to continue running MAX400, you must resubmit the MAX400 job, as MAX400 does not make any changes to the original code of your system. Therefore MAX400 is not modifying Licensed Internal Code.

MAX400 enhances the operating system by technology designed to increase the interactive processing workload/CPW of the computer system. Of course, this technology is a trade secret.

7. Is there technical support for MAX400?

Yes. Any problems with MAX400 should be reported to support@max400.net.  See also Technical Support Page.

A sample list of reference MAX400 users can be found here.
 


 

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