Coding Specialized Routines › Core Storage Requirements

Core Storage Requirements

The core storage requirements for a particular run must be examined on an individual run basis. However, you must meet some specific minimum requirements. For example, each partition/region in which the Reporting Facility is to be executed should contain at least 80KB bytes of real storage. In addition, at least 48KB bytes of GETMAIN/GETVIS storage must be available. Any additional core requirements depend entirely on the types of facilities requested.

Some of the questions you might ask yourself when trying to determine the resource requirements of a particular run are:

• How many input files are defined, and how big are their associated records?
• How many reports are being printed?
• Are CA Datacom/DB tables being referenced?
• Is CA Datacom Datadictionary necessary? Does a COPYDD command appear in the program?
• Are VSAM data sets being referenced?
• Is an IMS-DL/I database being referenced?
• Are large arrays defined or are an abnormal number of numeric constants, numeric edit patterns, or alphanumeric literals coded?
• Is a sort required (a sort requires a minimum of 20KB bytes)?

Based on the answers to the above questions, you can make a reasonable assessment of the core storage requirements for each particular run.