The Natural Basics Class is intended to provide the. 0000 ISN : 0000034E ISN Low Limit: 00000000 FB Length : 002D RB Length : 0045 SB Length : 000C VB Length : 000A IB Length : 0000 Com. Mainframe Tips for Developers. To assist in the optimization of the code, you should use the OPTIMIZE compiler option. With the. OPTIMIZE(STD) or OPTIMIZE(FULL) options in effect, you may receive optimizations that include: eliminating unnecessary branchessimplifying inefficient branchessimplifying the code for the out- of- line PERFORM statement, moving the performed paragraphs in- line,where possiblesimplifying the code for a CALL to a contained (nested) program, moving the called statements in- line,where possibleeliminating duplicate computationseliminating constant computationsaggregating moves of contiguous, equal- sized items into a single movedeleting unreachable code. Additionally, with the OPTIMIZE(FULL) option in effect, you may also receive these optimizations: deleting unreferenced data items and the associated code to initialize their VALUE clauses. Many of these optimizations are not available with OS/VS COBOL, but are available with IBM Enterprise. COBOL. NOOPTIMIZE is generally used while a program is being developed when frequent compiles are necessary. NOOPTIMIZE can make it easier to debug a program since code is not moved. Tips for Mainframe ProgrammersTips for Mainframe Programmers Compiled by Rijo Joseph [email protected] Page 1 of 104. Tips for Mainframe Programmers // DCB=(RECFM=FB,LRECL=80,BLKSIZE=800). I have given RECFM=VB. CONTROL-M/Enterprise Manager API Developers Guide describes. CONTROL-M for z/OS User Guide is a complete guide to the CONTROL-M Production Control System in a mainframe. FILE data set is replaced by a pipe of. You can browse the gdg or TAPE file by converting in to dasd file by using. VSAM Structure In this Mainframe. Mainframe – abend codes and details. However, IBM Enterprise COBOL now supports debugging programs compiled with the OPTIMIZE compiler option. OPTIMIZE requires more CPU time for compiles than NOOPTIMIZE, but generally produces moreefficient run- time code. For production runs, OPTIMIZE is recommended. WARNING: If your program relies upon unreferenced level 0. OPTIMIZE(FULL), since OPTIMIZE(FULL) will delete all unreferenced data items. One way to preventthe data item from being deleted by the OPTIMIZE(FULL) option is to refer to the data item in the. Microsoft Access within an Organization's Overall Database Strategy. Access is designed for file server solutions on local area networks. VB developers look down upon Access developers. PROCEDURE DIVISION (for example, initialize the data item with a PROCEDURE DIVISIONstatement instead of with VALUE clauses). Performance considerations using OPTIMIZE: On the average, OPTIMIZE(STD) was 1% faster than NOOPTIMIZE, with a range of 7% faster to equivalent.
On the average, OPTIMIZE(FULL) was equivalent to OPTIMIZE(STD). Smart DFSORT Tricks. Get the full title to continue reading from where you left off, or restart the preview.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
September 2017
Categories |