PTF LU15280 HOLDDATA for Datacom/AD customers
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PTF LU15280 HOLDDATA for Datacom/AD customers

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Article ID: 427268

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Updated On:

Products

Datacom/AD DATACOM - AD Datacom

Issue/Introduction

Running Datacom/AD 15.1 for CA 7 but CA 7 REST API is not used/installed.

The HOLDDATA section for PTF LU15280 states:

                      **************************                        
                      * STEPS    TO    PERFORM *                        
                      **************************                        
 Change the HEAPPOOLS statement in the CAYTMAC(CEEUOPT) member or       
 update the CEEOPTS DD statement input stream to the following:         
                                                                        
    HEAPPOOLS(ALIGN,                                                    
          384,79,624,15,1880,90,4176,90,5752,54,9560,90,                
          11016,35,13904,86,20048,90,30816,90,32760,90,                 
          64000,90)                                                     
                                                                        
 The workload from the CA7 REST API is unique such that the             
 recommended HEAPPOOLS setting is inefficient and may cause LE storage  
 to become fragmented. When this happens, the Datacom Server            
 mainframe region/address space can use all available storage and fail  
 with some sort of out-of-storage condition.                            
                                                                        
 For more information, see the IBM documentation:                       
 z/OS LE Programming Guide for 64-bit Virtual Addressing Mode           
                                                                        
  https://www.ibm.com/docs/en/zos/3.1.0?topic=hso-tuning-heap-storage   
                                                                        
 Copy the above link and paste it into your browser or perform a        
 search for "Tuning heap storage" in IBM doc.                           

Two questions:

  1. is that PTF really required if CA 7 REST API is not installed?
  2. there is no CAYTMAC library among the Datacom/AD 15.1 ones: where can that CEEUOPT member be found?

Environment

Datacom/AD 15.1  with Datacom Server 15.0 installed (FMID CAYTF00)

Resolution

  1. LU15280 must be applied, but the HOLDDATA can be ignored, if CA 7 REST API is not used/installed.
  2. The CEEUOPT member can be found on Datacom/AD CAAXMAC library.

Additional Information

Note that PTF LU15280 is for Datacom Server version 15.0 (FMID CAYTF00) but the latest versions of CA 7 REST API (12.1.07 and following) require version 15.1 (FMID CAYTF10), as version 15.0 is no longer supported since 2025-05-31. See the following documents:

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