So the real question, I submit, gets to be "how come there's so much of 
SCM tied up?" Are we trying to capture dumps into an already overly-full 
memory / SCM situation?

This thread (and a SEPARATE customer situation) prompted a discussion 
today in my team about doing more with the SMF 75 (and 71) data now that 
SCM is quite commonplace.

Cheers, Martin

Martin Packer,
zChampion, Principal Systems Investigator,
Worldwide Banking Center of Excellence, IBM

+44-7802-245-584

email: martin_pac...@uk.ibm.com

Twitter / Facebook IDs: MartinPacker
Blog: 
https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker



From:   Jim Mulder <d10j...@us.ibm.com>
To:     IBM-MAIN@LISTSERV.UA.EDU
Date:   17/07/2015 16:58
Subject:        Re: Dump Failing - Aux Shortage
Sent by:        IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU>



> From: Nathan Astle <tcpipat...@gmail.com>
> To: IBM-MAIN@LISTSERV.UA.EDU
> Date: 07/17/2015 11:49 AM
> Subject: Re: Dump Failing - Aux Shortage
> Sent by: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU>
> 
> Hi,
> 
> PageIO    Total  120m  Active     0
> Datasets  Total    40  Used      11
> SCM       Size   128G  Used    120G  94.02%
> LOCAL     Size  61.9G  Used   3.45G   5.57%
>   NONVIO               Used   3.32G   5.36%
>   VIO                  Used    133M   0.21%
> 
> 
> Type   Status   Size  Used    Pct% VIO
> PLPA   ACTIVE  70.3M 60.9M  86.62%
> COMMON ACTIVE   703M  320K   0.04%
> SCM    ACTIVE   128G  120G  94.02%
> LOCAL  ACTIVE  6.88G  386M   5.49% VIO
> LOCAL  ACTIVE  6.88G  388M   5.51% VIO
> LOCAL  ACTIVE  6.88G  394M   5.60% VIO
> LOCAL  ACTIVE  6.88G  402M   5.71% VIO
> LOCAL  ACTIVE  6.88G  399M   5.67% VIO
> LOCAL  ACTIVE  6.88G  401M   5.70% VIO
> LOCAL  ACTIVE  6.88G  385M   5.48% VIO
> LOCAL  ACTIVE  6.88G  402M   5.72% VIO
> LOCAL  ACTIVE  6.88G  383M   5.45% VIO

3.45G (used local) + 120G (used SCM) = 123.45G (used Aux)
61.9G (size local) + 128G (size SCM) = 189.9   (size Aux)

(123.45 * 100) / 189.9 = 65% 

 That is over the %(aux used) threshold for allowing a dump to start.
MAXSPACE has nothing to do with it.  You would get a different reason code
for MAXSPACE. 



Jim Mulder   z/OS System Test   IBM Corp.  Poughkeepsie,  NY

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