How to find maximum number of jobs that are allowed to run ?



IBM OS/370, MVS, OS/390, Linux, TPF, VM/CMS, VM/ESA, VSE/ESA, z/VM, z/VSE, z/OS, z/OS.e etc...

How to find maximum number of jobs that are allowed to run ?

Postby YGNHZEUS » Wed Nov 02, 2011 7:14 pm

Hi all,
How to find the setting of maximum number of jobs that are allowed to run concurrently on a z/OS system?
YGNHZEUS
 
Posts: 8
Joined: Wed Nov 02, 2011 3:11 pm
Has thanked: 0 time
Been thanked: 0 time

Re: How to find maximum number of jobs that are allowed to r

Postby enrico-sorichetti » Wed Nov 02, 2011 7:26 pm

all depends on Your definition of job
job in a strict meaning or in wider sense
as ... JOB, STC, TSO ?

for JOBs in strict sense the limit is the number of initiators
for TSO users the number is defined by the MAXUSERs TSO parameter
for STC( IIRC ) theoretically no limit

the best places to look for such info are
for the supported values ... the manuals
starting from
http://www-03.ibm.com/systems/z/os/zos/ ... index.html
and search for the INITIALIZATION guides

for the values used in Your organization ... Your suppoort
cheers
enrico
When I tell somebody to RTFM or STFW I usually have the page open in another tab/window of my browser,
so that I am sure that the information requested can be reached with a very small effort
enrico-sorichetti
Global moderator
 
Posts: 2994
Joined: Fri Apr 18, 2008 11:25 pm
Has thanked: 0 time
Been thanked: 164 times

Re: How to find maximum number of jobs that are allowed to r

Postby YGNHZEUS » Wed Nov 02, 2011 7:29 pm

enrico-sorichetti wrote:all depends on Your definition of job
job in a strict meaning or in wider sense
as ... JOB, STC, TSO ?

for JOBs in strict sense the limit is the number of initiators
for TSO users the number is defined by the MAXUSERs TSO parameter
for STC( IIRC ) theoretically no limit

the best places to look for such info are
for the supported values ... the manuals
starting from
http://www-03.ibm.com/systems/z/os/zos/ ... index.html
and search for the INITIALIZATION guides

for the values used in Your organization ... Your suppoort



Oh..Thanks. Is there any setting contained in IEASYSxx PARMLIB members?
YGNHZEUS
 
Posts: 8
Joined: Wed Nov 02, 2011 3:11 pm
Has thanked: 0 time
Been thanked: 0 time

Re: How to find maximum number of jobs that are allowed to r

Postby enrico-sorichetti » Wed Nov 02, 2011 7:32 pm

Is there any setting contained in IEASYSxx PARMLIB members?


why not look Yourself at the manuals ?
cheers
enrico
When I tell somebody to RTFM or STFW I usually have the page open in another tab/window of my browser,
so that I am sure that the information requested can be reached with a very small effort
enrico-sorichetti
Global moderator
 
Posts: 2994
Joined: Fri Apr 18, 2008 11:25 pm
Has thanked: 0 time
Been thanked: 164 times

Re: How to find maximum number of jobs that are allowed to r

Postby steve-myers » Thu Nov 03, 2011 2:10 am

YGNHZEUS wrote:Oh..Thanks. Is there any setting contained in IEASYSxx PARMLIB members?
No. The nearest specification in IEASYSnn is the maximum number of address spaces, which is not quite what you are looking for.
steve-myers
Global moderator
 
Posts: 2105
Joined: Thu Jun 03, 2010 6:21 pm
Has thanked: 4 times
Been thanked: 243 times

Re: How to find maximum number of jobs that are allowed to r

Postby NicC » Sat Dec 24, 2011 8:44 pm

Not a lot to do with memory. Just count the number of initiators then deduct those that are running system tasks eg IMS CICS DB2 etc. The remaining initiators are available for jobs of the right class. May years ago - mid '80s - whilst new mainframes were being installed I think the .limit was 1024 initiators but for effective throughput of batch we actually fired up about 30 or 40 including those for system tasks.
The problem I have is that people can explain things quickly but I can only comprehend slowly.
Regards
Nic
NicC
Global moderator
 
Posts: 3025
Joined: Sun Jul 04, 2010 12:13 am
Location: Pushing up the daisies (almost)
Has thanked: 4 times
Been thanked: 136 times


Return to Operating Systems

 


  • Related topics
    Replies
    Views
    Last post