topic Re: What is system parameter BJOBLIM ? in Operating System - OpenVMS

What is system parameter BJOBLIM ?

Wim Van den Wyngaert — Thu, 29 Jul 2004 02:32:30 GMT

Undocumented ?

Wim

Re: What is system parameter BJOBLIM ?

Uwe Zessin — Thu, 29 Jul 2004 03:00:28 GMT

I think it is supposed to mean 'Batch JOB LIMit', but it looks like it is not enforced (at least on V6.2-1H3 were I ran a short test).

Re: What is system parameter BJOBLIM ?

Lokesh_2 — Thu, 29 Jul 2004 03:41:17 GMT

Hi Wim,

BJOBLIM = Batch Job limit
IJOBLIM = Interactive job limit
RJOBLIM = Remote job limit
NJOBLIM = Network job limit

Thanks & regards,
Lokesh

Re: What is system parameter BJOBLIM ?

Wim Van den Wyngaert — Thu, 29 Jul 2004 04:47:53 GMT

*** BJOBLIM = Batch Job limit
This is not used ? I didn't encounter the limit during a test.

*** IJOBLIM = Interactive job limit
But only for non-priv users. Are all interactive users counted for this limit (telnet, set ho) ?

RJOBLIM = Remote job limit
For terminals RT*. Telnet etc are ignored.

NJOBLIM = Network job limit
What is exactly in it ?

IMHO : this is simply a bunch of old crap.

Wim

Re: What is system parameter BJOBLIM ?

Uwe Zessin — Thu, 29 Jul 2004 05:00:17 GMT

IJOBLIM is honored for all interactive logins without OPER privilege. Now, DECterm logins do not count against that limit - there is a special bit in this UCBs that directs LOGINOUT to ignore IJOBLIM.

Re: What is system parameter BJOBLIM ?

Lokesh_2 — Thu, 29 Jul 2004 05:05:35 GMT

"NJOBLIM = Network job limit
What is exactly in it ?"

I guess anything that you see with $SHO SYSTEM/NETWORK

Regards,
Lokesh

Re: What is system parameter BJOBLIM ?

Lokesh_2 — Thu, 29 Jul 2004 05:15:04 GMT

"*** BJOBLIM = Batch Job limit
This is not used ? I didn't encounter the limit during a test."

How did you tested it ? With a non privilege account and setting BJOBLIM to some low value like 1 or 2 ? Maybe this can give some hint.

Thanks & regards,
Lokesh

Re: What is system parameter BJOBLIM ?

Wim Van den Wyngaert — Thu, 29 Jul 2004 05:16:24 GMT

For all these parameters : where is it exactly documented ?

I also found that show sys/net doesn't return all process that have f$getjpi(pid,"mode") = NETWORK.

Wim

Re: What is system parameter BJOBLIM ?

Wim Van den Wyngaert — Thu, 29 Jul 2004 05:20:41 GMT

Lokesh,

I tested it with bjoblim on 2 and with a user with only NETMBX + TMPMBX.

Wim

Re: What is system parameter BJOBLIM ?

Wim Van den Wyngaert — Thu, 29 Jul 2004 06:05:12 GMT

Just had njoblim on 2. Same user with 2 privs and tried 3 t2t. It works. The processes count 5 with show sys/net. Why ?

Wim

Re: What is system parameter BJOBLIM ?

Wim Van den Wyngaert — Thu, 29 Jul 2004 07:20:18 GMT

Did some further testing on 7.3

NJOB, BJOB are not used. BJOB is increased but jobs are not refused.

Only IJOB contains what show sys/int shows.

ana/sys can show you the values
ex sys$gl_njobcnt
(n,i,b)

RJOB is validated by I don't know how to examine it.

Wim

Re: What is system parameter BJOBLIM ?

Duncan Morris — Thu, 29 Jul 2004 08:23:17 GMT

Hi Wim,

I seem to remember that BJOBLIM was obsoleted many years ago (V3.x or V4.x).

I believe that is was put in originally with a view to being used to limit batch jobs, but was never implemented in the code, and was subsequently removed from documentation.

Re: What is system parameter BJOBLIM ?

Chris_616 — Thu, 29 Jul 2004 12:09:51 GMT

IJOBLIM

IJOBLIM sets the maximum number of interactive jobs that can be on the system concurrently. You can control the maximum number of concurrent interactive users on the system with the DCL command
SET LOGINS/INTERACTIVE.
IJOBLIM is a DYNAMIC parameter.

RJOBLIM

RJOBLIM defines the maximum number of remote terminals allowed in the system at any one time.

RJOBLIM is a DYNAMIC parameter.

NJOBLIM

NJOBLIM establishes the limit for network jobs. The maximum number of jobs is 1024. The minimum is 0, and the default is
16.

NJOBLIM is a DYNAMIC parameter.

Based on the above definitions, BJOMLIM would be the maximum number batch jobs allowed on a system at any time. It is a dynamic parameter and the maximum value is 1024.

Re: What is system parameter BJOBLIM ?

Lawrence Czlapinski — Fri, 13 Aug 2004 17:03:06 GMT

1. ! For VMS 7.3 variants, "HELP SYS_PARA" will list the system parameters for your system.
SYSGEN> HELP SYS_PARA
.
.
.
Sys_Parameters Subtopic?
! then enter unique sys_parameter letters from the list to get a short description of its function.

Yes, BJOBLIM isn't documented on VMS 6.1 or for 7.3 variants. You can still do SHOW BJOBLIM and even do a SET BJOBLIM.
2. SYSGEN parameter descriptions can also be found in OpenVMS SYSTEM Management Utilities Reference Manuals for your VMS version in the System Parameters appendix.

Re: What is system parameter BJOBLIM ?

Galen Tackett — Tue, 17 Aug 2004 07:13:08 GMT

Using Google, I found some pertinent text that should settle this question in the V8.2 EFT Release Notes.

That document makes it clear that as of V8.2 both BJOBLIM and NJOBLIM are obsolete. (I believe the V8.1 release notes also documented them as obsolete.)

Below is an excerpt of the pertinent text. You can see the entire document at http://h71000.www7.hp.com/doc/82eft/6674/ovms_82_rel_notes.PDF

---Excerpt begins below---

> 4.25.3 Obsolete System Parameters
V8.2
> The following system parameters have been removed in OpenVMS Version 8.2:
> BJOBLIM
> BOOT_STYLE
> EXUSRSTK
> LAMAPREGS
> NISCS_LAN_OVRHD
> NJOBLIM
> QBUS_MULT_INTR
> SA_APP
> SBIERRENABLE
> SCSCONNECT
> SD_ALLOCLASS
> TAILORED
> UDABURSTRATE
> VECTOR_MARGIN
> VECTOR_PROC
> XFMAXRATE

Re: What is system parameter BJOBLIM ?

Wim Van den Wyngaert — Tue, 17 Aug 2004 08:38:28 GMT

I think HP has a documentation problem. Features are deimplemented without changing the doc.

Wim

Re: What is system parameter BJOBLIM ?

Aleksander Sinigoj — Mon, 23 Aug 2004 04:04:34 GMT

BJOBLIM > Batch Job Limit
The max. number of batch thah can execute concurently. I never tested but i think is absolete.

Re: What is system parameter BJOBLIM ?

Jess Goodman — Tue, 21 Sep 2004 19:05:10 GMT

I really wish that NJOBLIM would work. When you run the OSU Web server all requests to the web server that need to run a script (CGI) use a DECnet server process. If there is a system problem and the webserve can't respond as quickly as requests come in, these network processes build up.

If NJOBLIM worked you could put an upper limit on this, to prevent system memory and the page file from being used up. As it is we have to use MAXPROCESSCNT instead - but if that limit is reached batch jobs can't run and you can't login to try to fix the problem.

Re: What is system parameter BJOBLIM ?

Jan van den Ende — Wed, 22 Sep 2004 05:29:01 GMT

Jess,

What VMS version are you running?

I am not sure about latest version, and as stated above it will be removed in 8.2, but I have a very definity memory of NJOBLIM working only too well.
When we had intermitted problems with network connectivity, we finally found out that NJOBLIM was the limiting factor, and increasing it (don't even know how far, at home now, cannot check) removed the problem.
As far as I recall the timeframe, that MUST have been V7.1 or V7.2. I DON'T recall reading any release notes about it being obsoleted.

Jan

Re: What is system parameter BJOBLIM ?

Wim Van den Wyngaert — Thu, 23 Sep 2004 01:29:22 GMT

Jan,

Until VMS 7.3 : NJOBLIM isn't doing anything.

Wim