DFHSM0131 SOS below 16MB when using Nastel AutoPilot TransactionWorks

Contact the vendor Nastel Technologies for an updated load module that addresses a memory leak problem that leads to the short on storage (SOS). In the reported case, the fix provided by Nastel was v6516 hotfix01.

Reviewing a system dump taken at the time of the SOS condition, you will see the CDSA is using the majority of the below the line storage. To format the Storage Manager domain, enter VERBX DFHPDxxx 'SM=1' (where xxx is your release level of CICS like 680 for CICS TS 5.1). Here is an example from the SM domain:

 Current DSA limit:                    6144K
 Current DSA total:                    6144K
 Currently SOS below 16M:                YES

Here is the breakdown of the below the line DSAs:

    UDSA Summary Size:            256K
    CDSA Summary Size:           3840K
    SDSA Summary Size:           1792K
    RDSA Summary Size:            256K

The CDSA is utilizing the majority of the below the line DSA. Looking at the Domain subpool summary for CDSA, you will see most of the storage is held in a subpool called NSQTRUES. This subpool is owned by Nastel. It is NOT a CICS subpool.

 ==SM: Domain subpool summary (CDSA)
    Name       Id Gets  Frees  Elems  Pagestg 
    NSQTRUES 01C9    0      0    275    2772K 
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