[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

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

3650.0. "Limit on windowing terminals?" by MAIL::KUTZ (Karla Kutz in St. Louis) Tue Nov 13 1990 12:30

We have run across a really strange problem at our customer site. We have the
following configuration currently.

VAX 6440 with VMS V5.4 and 192 MB of memory
~15 VS3100s
~35 VT320s
~24 VT1000s (4 MB of memory)
~70 VT1200s (15" monitor) (3 MB of memory)

We are able to log into the 6440 with the VS3100s or the VT320s or the 
VT1000s/VT1200s in a LAT terminal window with marvelous success. 

However, we can only log in the VT1000s/VT1200s in an X session on the
average of about 20 users. We have hit a limit of some sort and this has
ranged between 16 and 25 users. 

The strange part is that the number of users has not taxed the system. We are 
running around 15% utilization on the average of the CPU. The last time we
attempted to determine the memory utilization was when we hit the limit at
16 users and when doing a SHO MEM, we were only at about 50% of the IRPCOUNT,
LRPCOUNT and SRPCOUNT. 

What this is telling us is that we are not bound (yet) by the current system 
configuration but perhaps by some parameter in VMS or DECwindows or
something else we haven't thought of yet. Is there some limit within
DECwindows that is going to prevent us from connecting some number of
windowing terminal users? 

Since this is a customer site, we are getting desparate. We're starting
to run out of ideas and we're looking for hints.

T.R	Title	User	Personal Name	Date	Lines
3650.1	How many process slots do you have?	CVG::PETTENGILL	mulp	`Tue Nov 13 1990 19:15`	14
	Remember that 20 users of DECwindow terminals probably translates to something on the order of 120 processes: 1. session manager 2. window manager 3. initial fileview 4. terminal emulator process 5. terminal session logged into terminal emulator window The above is created by default when you login to the decwindows environment without any decwindows profile information. Now, you might start calendar, clock, and another terminal: 6. calendar 7. clock 8. second terminal session
3650.2	High max process count	MAIL::KUTZ	Karla Kutz in St. Louis	`Wed Nov 14 1990 09:34`	2
	I'm not at the customer site right now but we know we have MAXPROCESSCOUNT set high. We've never reached that limit yet.
3650.3	IJOBLIM ?	PLAYER::DEVALCK	De Valck Patrick ADG Brussels @BRO	`Thu Nov 15 1990 02:58`	5
	The number of interactive logins maybe ? Maybe the number of remote logins allowed (set by @SYS$MANAGER:REMACP or by some SYSGEN parameter). I do not know from heart if there is a parameter that limits the number of detached processes.
3650.4		STAR::MCLEMAN	Jeff McLeman, VMS development	`Thu Nov 15 1990 06:42`	2
	MAXPROCESSCNT maybe?
3650.5	Some parameter changes	MAIL::KUTZ	Karla Kutz in St. Louis	`Thu Nov 15 1990 15:15`	44
	We have the number of interactive logins set high. We did run across that problem earlier but we got the error that Number of logins has been exceeded or something like that. We upped that and have not experienced that problem yet. The MAXPROCESSCNT has been set to a very large number and we haven't reached that. We received a paper called "Troubleshooting a VT1200/VT1000 Hung,Froze or Crashing" paper that is Digital Internal Use Only from a Jeff Gilbert in VMS Workstations Support. We experience some of those problems but only when we have X sessions going, not for Terminal windows (LAT Terminal Window not DECterm). In the paper, it is suggested that the following parameters be set to PQL_MASTLM TO 100 PQL_MBIOLM TO 400 PQL_MBYTLM TO 32,768 PQL_MDIOLM TO 40 PQL_MFILLM TO 8 PQL_MPRCLM TO 16 PRCLM TO 16 BIOLM TO 400 BYTLM TO 32, 768 DIOLM TO 40 FILLM TO 8 ASTLM TO 100 We did this Tuesday night (11/13) and brought the system back up and were able to login about 31 terminals in X sessions which is a definited improvement. However, Wednesday during the working hours, the number of X sessions able to log in backed off to about 16. We still are not using the max memory (about 50%) or the max CPU (about 20%). I still find this strange. I appreciate your ideas up to this point and we're still looking for help. Any other sites with this many VT1200s and VT1000s experiencing the same problems?
3650.6	MACPROCESSCNT & IJOBLIM	MAIL::KUTZ	Karla Kutz in St. Louis	`Thu Nov 15 1990 17:38`	5
	As a follow-up to previous replies: MAXPROCESSCNT = 350 IJOBLIM = 200 We haven't even come close on these.
3650.7		UFP::MURPHY	Rick - Washington URC	`Fri Nov 23 1990 13:37`	6
	A simple question: WHY aren't you able to log in more VT1200s? If you were more specific, you would be more likely to get an answer; currently, we're guessing at what is happening. The more details you can supply the better. -Rick