System Generation Statements › ADSO Statement—Define CA ADS Generation › ADSO Statement Usage

ADSO Statement Usage

CA ADS Buffer Sizes

The following considerations apply to specifying the primary and secondary buffer sizes in the ADSO statement:

• Each buffer contains one record-buffer-block (RBB) header. The RBB header requires 32 bytes of storage.
• For each record, CA ADS maintains a header:
  • Database record headers require 52 bytes of storage
  • Logical record headers require 68 bytes of storage
• Each buffer must be large enough to accommodate the largest subschema, map, work, database, or logical record used by a dialog, plus the RBB header, plus the record header.
• All records and headers are aligned on doubleword boundaries.
• The primary and secondary buffer sizes are also used by the CA ADS and CA ADS/Batch dialog compilers, by the CA ADS application compiler, and by the ASF interface into CA ADS to allocate work areas for internal control blocks.