tyvm, Barbara, nice point.  I never knew VSM would go *below* when it exhausted 
*above*.  Others are wading through the dump now.  But I will check out the 
info APAR and relay your advice. 

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of 
Barbara Nitz
Sent: Wednesday, November 02, 2011 8:19 AM
To: IBM-MAIN@bama.ua.edu
Subject: Re: S878 RC 10 Above or Below the Line? Private or LSQA?

>The IEA705I message shows that NETMENU is failing on an unconditional GETMAIN 
>fixed request for 20K in LSQA (subpool 229) below the line in both the first 
>and second occurrence.
>
>The Private Area is maxed out at 10M.  It should be no more than 2M.  So it 
>looks like the Private Area is the culprit as Tom thought was more likely.  If 
>so, I suppose LSQA had no room to grow.
>
>I guess it is time to look at the source code of NETMENU.  It should not be 
>asking for so much below the line.

NO. It is time to look at the DUMP, as was suggested several times before. 
Everything else is pure speculation.
Also, keep in mind that the culprit may very well be that storage *above* the 
line is exhausted. If 31bit storage (region) is not available anymore, then VSM 
will go below the line (if there is space there in the region). The end result 
is that you'll see a request failing *below* the line because storage *above* 
is exhausted. I have seen abend80A (indicating a storage below problem), but 
the problem was above the line.

The *only* way to debug this is to look at a dump and look at the storage 
allocated (search SIS for 'abend878 debug' - gives a very old, very good info 
apar that tells exactly how to do it). 

Even if you have a generic abend878 action=nodump slip trap active, set another 
slip trap on 878 with an action other than nodump. It will override the generic 
slip trap.

Barbara Nitz

----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html

----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO
Search the archives at http://bama.ua.edu/archives/ibm-main.html

Reply via email to