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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

3396.0. "Process limit ??" by COMICS::FISCHER (I've got a special purpose) Wed Sep 26 1990 08:01

I have a customer running a series of applications. The situation is
this...

They have bypassed the DECwindows login box so they get a blank
display screen. Then, from a terminal, they invoke an application.
From a menu on the screen, they invoke new applications which are
each run as detached processes. When they have 15 processes 
running, the next application they try to invoke fails with a fatal xlib
error - X error failed to open display.

I read a prevoius note on this, but wanted clarification. Is there a limit
to the number of processes that can be run on a workstation running
DECwindows (v5.3)?

He recently upped MAXPROCESSCNT and BALSETCNT and I have 
checked his free Process entry slots and Balance set slots and he has 
plenty available (about 20 or so).

Thanks for you help on this.


Ian Fischer
UKCSC.
T.RTitleUserPersonal
Name
DateLines
3396.1ENQLM of server processGSRC::WESTSCARY : A programmer with a screwdriver.Wed Sep 26 1990 09:3219
Hi,

  What you need to do is increase the ENQLM of the server process.  This is
done from a com file in SYS$MANAGER.

  What you will notice is that there is a hard limit to the number of
display connections that the server will handle and that limit is 32.

  In the RUN/DETACH command for the server process the ENQLM provided is too
small.  Just make this number larger (like double) and you should be able
to get all 32 display connections, just remember though that 32 is the limit
and it will not change.

  I believe that com file is SYS$MANAGER:DECW$STARTSERVER.COM. (Or something
like that)

						-=> Jim <=-

3396.2COMICS::FISCHERI&#039;ve got a special purposeWed Sep 26 1990 09:5719
The enqueue_limit only seems to be there in the v5.3-1 version
od DECW$STARTSERVER.COM and is set to 64, or to the value
of the logical name decw$server_enqueue_limit, or the value of
PQL_MENQLM. On my system, dong a show proc/quota on the
server process says Enqueue quota is 52.

So, the customer needs to..
i)	upgrade to VMS v5.3-1
ii)	edit decw$startserver.com and increase decw$server_enqueue_limit
	from 64 to a higher number.
iii)	he should now be able to have a maximum of 32 processes 
	running.

Please can you clarify


Thanks

Ian
3396.3QUARK::LIONELFree advice is worth every centWed Sep 26 1990 12:194
Is the limit the number of processes or the number of connections to the
server?  I seem to remember a limit of 16 there.

		Steve
3396.4COMICS::FISCHERI&#039;ve got a special purposeThu Sep 27 1990 09:4111
Thanks for the response.
Could someone just clarify these points again for me.

It is not possible to have more than 32 connections to the Server.

It is not possible to have more than 15 or 16 interactive DECwindows
processes running on the client at one particular time. Or can this be
changed by tuning? If so, what specifically needs altering?


Ian
3396.5PSW::WINALSKICareful with that VAX, EugeneFri Sep 28 1990 00:4719
RE: .4

32 connections is the maximum for a single VMS DECwindows Server.

>It is not possible to have more than 15 or 16 interactive DECwindows
>processes running on the client at one particular time. Or can this be
>changed by tuning?

That depends on what you mean by "interactive DECwindows processes".  You
can have as many interactive processes running on a client machine as you like,
as long as you never exceed the limit of 32 connections to any server.  Note
also that all DECterms share a single connection and so you can create many,
many DECterms and they only count as 1 toward the 32 connection limit.

Aside from the 32 connection limit (a server-side restriction), the number
of processes you can have are controlled by the normal VMS system parameters
(MAXPROCESSCNT, BALSETCNT, etc.).

--PSW