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Frequently Asked Questions

 2

 

 

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The questions covered in this section (FAQs 2) are:

I.      a) How do I test if MAX400 is working?
         b) Why does the response time appear "slow" the first time I start MAX400?
II.    Can we rename MAX400 (M400) on our system?
III.  Can we delete MAX400 from our system?
IV.   Why am I having trouble restoring MAX400 on our system?
V.     Does the whole system slow down when the interactive governor is "triggered"?
VI.   License agreement tells me use of third party products to defeat 5250 interactive capacity is not allowed.

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I. a) How do I test if MAX400 is working?

If you are currently experiencing slowdowns due to excess interactive use then you should notice an improvement in response times once MAX400 starts running.

Alternatively, here is another method of testing max400 formally:

i. Please test this at an appropriate time on your system (i.e. perhaps not at a time when your system has a lot of interactive users but a very quiet time)

ii. Please read the following steps carefully, completely before beginning the test

 1. First copy the below code into a source member then compile it as a CL program.

This program runs in a loop and consumes large amounts of CPW.
          
            PGM
            DCL      VAR(&DUMMY) TYPE(*CHAR) LEN(1)
            LOOP:    CHGVAR VAR(&DUMMY) VALUE(&DUMMY)
            GOTO     CMDLBL(LOOP)
            ENDPGM

 2. Next start two interactive sessions and call the above program from each of those sessions. These can be stopped later using SysReq 2. It is necessary to run this from two sessions because the system allows a single session to run without 'punishment'.

 3. Now monitor the system activity from a third session using e.g. WRKSYSACT. Initially the jobs will use about 50% of the CPU each, or the full amount available for the partition. Then after a while (a few seconds or minutes depending on the system model) the jobs will slow down and the CFINTnn tasks will consume a lot more.

 4. Now start MAX400 running and continue monitoring. The jobs should soon return to using 50% each. It may be necessary to first pause or stop the interactive looping jobs before starting MAX400 if the system is responding very slowly.

Interactive tasks can only be seen with IBM's WRKSYSACT and also Operations Navigator (a.k.a. iSeries Navigator) via Management Central. Alternatively, use WRKACTJOB to see how much capacity interactive jobs are consuming in total and compare that with the stated system capacity.

We encourage each prospect/customer should evaluate and test MAX400 satisfactorily in their particular environment prior to purchasing the MAX400 product.

1. b) Why does the response time appear "slow" the first time I start MAX400?

 It takes a while for MAX400 to start working. When you start MAX400, it first takes a few seconds testing your system response: initial testing. Then MAX400 starts to make the response time faster.

If you start MAX400 when the system is busy it will take longer to do this initial testing - sometimes several minutes - before completing the MAX400 goal. So you need to start MAX400 running,  when the system is quiet, then after a few seconds (depending on how fast your system is) it will be OK to operate other heavy work (loads).

II. Can we rename MAX400 (M400) on our system ?

YES.    This can be completed  via this call:                    CALL M400/M400 *RENAME

This will display a screen showing the current object names and gives the ability to change them. To change object names, type over the old names and press Enter. This will rename the objects and the utility will know what the new names are.

Before renaming, first stop the utility from running using: M400/M400 *STOP

Then do the rename and then restart using the new object names, e.g.: SOMELIB/SOMECMD

All objects contained in the utility's library can be renamed, including the Library and the Job name(s) that are submitted.
 

III. Can we delete MAX400 from our system ?

YES.    This can be completed  via this call: DLTLIB   M400
 

IV. Why am I having trouble restoring MAX400 on our system?

On OS/400 V5R1M0 or higher, first change the system value QVFYOBJRST to '1', before doing the restore.
 

V. Does the whole system slow down when the interactive governor is "triggered"?

Situation:
 
User has a limited interactive machine.
User completes a few long running interactive queries and the whole/complete machine (interactive and batch) slows down.
 
Why?
 
When the IBM Interactive governor 'triggers' the limit , it "slows" down the WHOLE system.  Not only the interactive portion but also the BATCH CPW portion.

Answer:

 
Max400 will overcome the above problem, because MAX400 will tune the IBM Interactive governor from being 'triggered'.

VI.   License agreement tells me use of third party products to defeat 5250 interactive capacity is not allowed.

a) Is this agreement fair and enforceable? Does this sound like a monopolistic practice? See www.max400.net/news7.htm

b) Does this agreement ask you to also buy SAN(disk) and other ancilliary products from IBM and IBM alone?

c) IBM is trying to force/coerce customers to buy interactive CPW from them and them only.  What if IBM did this for Hard Disk or Tape drives...would the customer agree to this form of coersion/practice?  www.max400.net/legal.htm  shows IBM's double standards on this issue.

d) Please read MAX400 News on the www.max400.net/product.htm page.
 
  
  
 

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