| Title: | Zap Technical Conference |
| Notice: | ZAP Version 5.3 is available. See note 1.1 |
| Moderator: | ZAPDEV::MACONI |
| Created: | Mon Feb 24 1986 |
| Last Modified: | Mon May 05 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 170 |
| Total number of notes: | 492 |
I have two problems/queries regards the use of ZAP.
1 - Use with users using ACMS. It appears that when a user is
using an application written using ACMS all work is attributed
to the application server. As this is not part of the user's
process tree the process appears idle, and ZAP zaps it after
the allotted idle time.
I can of course exclude the image the process runs when
using the ACMS server, ie: ACMSOPR. The problem I have is
whats to stop a user firing up an ACMS application menu to
avoid being ZAPped. Any ideas to get round this? Maybe something
for ZAP V4.0.
2 - The second problem is with VAXnotes, which does a significant
amount of work to trap and display the ZAP message. I have
found that to stop an idle process which is using VAXnotes
I need the sensitivity set to 10. This may not be unreasonable
but then again it seems a long way from ZAP's default of 5.
I dont have the flexibility to set the sensitivity level
for the VAXnotes image, so all other processes must suffer.
Another alternative would be to turn off the messages sent
to users using VAXnotes, but this seems decidedly user
"unfriendly". Again maybe V4.0 could incorporate the ability
to selectively set the sensitivity on an image.
Any comments, inputs, work arounds or corrections greatly
appreciated.
Regards,
Ian
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 45.1 | Some suggestions | NRADM3::MACONI | The Doctor | Mon Feb 01 1988 11:30 | 21 |
In answer to your questions:
ZAP uses the formula CPU(100th sec)+(2*bufio)+(3*dirio) and compares
this to the sensitivity. The lower the sensitivity (towards zero)
the less work that needs to be done to be non-idle.
Since (1) ACMS does require user input and terminal output, the
BUFIO will increase over time even if cpu and dirio does not. With
the default sensitivity of 5, three bufios are required in 1 minute.
This may be too many for this process and a lower sensitivity may
be required.
As for (2) VAXnotes, setting a longer time limit with a smaller
sensitivity will help VAXnotes. Again, bufio is the key here since
the server does most of the work. A limit of 5 may be too high
in your environment.
Thanks for the suggestion, I will try to work individual sensitivities
into V4.0.
Keith Maconi
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