How can Vision Builder programs utilize Above the Line storage?

Products

• Vision:Builder

Issue/Introduction

How can Vision Builder programs utilize Above the Line storage?

Resolution

KD for issue 36571019 for Vision Builder

 

How can Vision Builder programs utilize Above the Line storage?

 

The default is above the line storage. Typically, not an issue for most programs. Some programs may also call other programs that are in AMODE24. Then this would create a situation where you may want to adjust the individual program. Later in this article are some instructions and options that will assist you in overriding the M4PARAMS being utilized globally.

 

To alter storage above/below the line globally, as a default for ALL Builder programs you must use the setting in the M4PARAMS member of BLSAMP. This is where all global options are established during install and/or maintenance updates. 

 

Your hlq.BLSAMP(M4PARAMS)

 

Look for this parameter in your M4PARAMS;    AMODE31  EQU  “N”  will tell the product to only use 24bit storage below the line. “Y” will tell the product to only utilize 31bit above the line storage for all processing. Remember, these are GLOBAL options.

 

AMODE31  EQU   C'Y'     FILE PROCESSING AMODE(31) = YES     

 

This setting/parameter is discussed in the Vision Builder Install Guide page B-5 and the example in this document can be found on page B-13.

 

Bear in mind that the use of many older programs that call other older programs may still require 24bit storage based on their design and intent. The question arises, do you want to globally make all programs 31bit or selectively decide to use the program setting to use 31bit/24bit storage?

You should review this carefully before you make a global change.

 

To utilize above the line storage (above the 16m line) on z/OS you can utilize the following parameters in your Vision Builder program. This is for a specific program and not a global setting.

 

In the Vision Builder Specifications Guide page 2-225 the following can be used to acquire above the line storage.

 

31-BIT  YES 

 

Ex: IMSDEFS RP31-BIT  YES    

 

In the Vision Builder Specifications Guide page 2-228 the following can be used to obtain more storage, larger getmain values.

 

MAXGETMN  8192K

 

Ex: IMSDEFS  RPMAXGETMN  8192K 

 

The results of the examples would be utilizing above the line storage and use increments of 8192K for each GETMAIN required for the program.

 

If you are utilizing ASL Builder code then the same process can be implemented. You can find this discussion in the Vision Builder ASL Reference Guide page 3-14.

 

Ex: CONTROL AMODE 31, GETMAIN 8192K

NOTE:

Keep in mind that the global parameters (M4PARAMS) are traditionally set up for most significant processing. However, these documented override capabilities should be reviewed and tested before implemented into any production stream.