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Conference bulova::decw_jan-89_to_nov-90

Title:DECWINDOWS 26-JAN-89 to 29-NOV-90
Notice:See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit
Moderator:STAR::VATNE
Created:Mon Oct 30 1989
Last Modified:Mon Dec 31 1990
Last Successful Update:Fri Jun 06 1997
Number of topics:3726
Total number of notes:19516

586.0. "decw applications uses 278 global pages each" by RAB::DESAI (Jatin Desai) Wed Apr 12 1989 11:52

On some of our workstations, every time we run ANY DECwindows application
(Clock, Calculator ...), the number of available global pages decreases by
278. Usually people try to keep number of available global pages to a minimum
so this may cause problems when running a lot of DECwindows applications
on VMS. It should be noted that this doesn't seem to happen on all of our
workstations - only some.

Has any one seen this ? Seems like a user quota problem ?

Jatin

------------------------------------------------------------------------------
Sequence of actions to see this happen.

Terminal - 1
-------------

   $ install :== $install/command
   $ install
   INSTALL > list/glo/sum

        Summary of Local Memory Global Sections

    393 Global Sections Used,  46452/13548 Global Pages Used/Unused

Terminal - 2
------------  

   $ MCR DECW$CLOCK

Terminal - 1    [ LOST 278 global pages]
-------------

   INSTALL > list/glo/sum

        Summary of Local Memory Global Sections

    393 Global Sections Used,  46730/13270 Global Pages Used/Unused


Terminal - 2
------------

    Control-Y
    $ EXIT

Terminal - 1    [ GAINED 278 global pages back]
------------

   $ install
   INSTALL > list/glo/sum

        Summary of Local Memory Global Sections

    393 Global Sections Used,  46452/13548 Global Pages Used/Unused


T.RTitleUserPersonal
Name
DateLines
586.1LOCAL transport?MIPSBX::thomasThe Code WarriorWed Apr 12 1989 12:433
I assume the local transport uses a shared global section (278 pages?) to
pass information between Xlib and the Xserver.  

586.2RAB::DESAIJatin DesaiWed Apr 12 1989 12:516
Re: .-1

That is it. Thanks.

Jatin

586.3RAB::DESAIJatin DesaiThu Apr 13 1989 14:066
Is this expected behaviour ? 278 pages seems like a large number for shared
memory. Is this documented in the release notes or somewhere ?

Jatin

586.4STAR::ORGOVANVince OrgovanFri Apr 14 1989 00:033
    That's the expected behavior - about 280 pages for each shared
    memory connection. I don't believe that it's documented.

586.5RAB::DESAIJatin DesaiFri Apr 14 1989 12:2318
>    That's the expected behavior - about 280 pages for each shared
>    memory connection. I don't believe that it's documented.

Thanks Vince. Please do consider documenting it in the release notes and
under SET DISPLAY command. Currently, if you do not have enough global pages,
this is what you get:

$ MCR DECW$CLOCK
X Toolkit Error: Can't Open display
%DWT-F-DWTABORT, xtoolkit fatal error

Not very informative. The problem is compounded with products like DECdecision
where with a single DCL command a user can fire four (or more) DECdecision
component applications.

Jatin