Can I change to a different ACT than the one specified in the CA TPX PROC without having to cycle TPX?

Document ID : KB000011307
Last Modified Date : 14/02/2018
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Introduction:

Is it possible to activate an ACT (Application Characteristics Table) of a different name than the ACT defined in the TPX PROC/JCL without having to stop and restart TPX?


//TPXZA    PROC TPREFIX='TPX.PROD',   TPX DATASET NAME PREFIX      
//             VNODE=APTPXPRD,        THE TPX APPL MEMBER IN VTAMLST
//             SMRT=SMRTPRD,          SYSTEM OPTIONS TABLE            
//             ACT=ACTPRD,            APPL CHARACTERISTICS TABLE    
//             PRTB=,                 PRINT DESTINATION TABLE         
//             VMSK=,                 VIRTUAL TERMINAL MASKING TABLE  
//             TMSK=,                 TERMINAL OPTIONS TABLE          
//             PPS=,                  USER PASSTHRU PRINT TABLE       
//             OVAC=,                 OV/MVS APPL CONNECTIVITY TABLE  
//             SAMT=,                 SECURITY ACTION/MESSAGE TABLE   
//             MODETAB=,              MODE TABLE NAME                 
//             DUMP=X,                DUMP SYSOUT CLASS               
//             OUT=X                  LOG AND OTHER SYSOUTS
Question:

Can I change to a different ACT than the one specified in the CA TPX PROC without having to cycle TPX?

Environment:
CA TPX for z/OS
Answer:

The answer is actually "yes AND no":

  • YES - you can "change" to a different ACT using the RELOAD ACT=xxx command in TPXOPER.  Note that not all fields may be updated if the application is not quiesced.

  • NO - doing this will not "delete" ACT entries which were defined in the original ACT but are not defined in the new ACT.

So depending upon how the new ACT differs from the original, you may be able to avoid stopping and starting the TPX started task(s).

Additional Information:

RELOAD ACT

Reloads an Application Characteristics Table (ACT). All fields in the ACT are updated except the following fields, which are updated only if the application is quiesced:

  • Type
  • Keep virtual terminal
  • End-to-End Option
  • Readbuf Technique
  • Screen even if readbuf technique
  • Inbound Compression
  • OPENGATE Control User
  • Load Module Name

 

TPX 5.4 - Operator Commands - RELOAD

TPX 5.4 - Administrating - Applications Characteristics Table (ACT)