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IBM OS manual Third edition March

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Third edition (March 1999)

This edition applies to Release 3 of CICS Transaction Server for OS/390, program number 5655-147, and to all subsequent versions, releases, and modi®cations until otherwise indicated in new editions. Make sure you are using the correct edition for the level of the product.

This edition replaces and makes obsolete the previous edition, SC33-1777-01. The technical changes for this edition are summarized under ″Summary of changes″ and are indicated by a vertical bar to the left of a change.

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IBM OS manual Third edition March

Contents

CICS Transaction Server for OS/390 CICS Transaction Affinities Utility GuideRelease Page CICS Transaction Server for OS/390 CICS Transaction Affinities Utility GuideRelease Third edition March Contents Chapter 1. Introducing transaction affinitiesChapter 2. Introducing the Transaction Affinities Utility Chapter 3. Preparing to use the affinity utility programAppendix A. Details of what is detected Appendix B. Correlating Scanner and Reporter output to sourceAppendix C. Useful tips when analyzing Transaction Affinities Utility Contentsvi CICS Transaction Affinities Utility Guide Notices Trademarks BookManagerCICS CICS/ESAHow to use this book PrefaceWhat this book is about Who this book is forNotes on terminology Argument zeroBibliography CICS Transaction Server for OS/390CICS books for CICS Transaction Server for OS/390 CICS Transaction Server for OS/390 Planning for InstallationCICSPlex SM books for CICS Transaction Server for OS/390 Other CICS booksCICSPlex SM View Commands Reference Summary CICSPlex SM AdministrationSummary of changes Changes for the CICS Transaction Server for OS/390 Release 3 editionChanges for the CICS Transaction Server for OS/390 Release 2 edition Changes for the CICS Transaction Server for OS/390 Release 1 editionxiv CICS Transaction Affinities Utility Guide Chapter 1. Introducing transaction affinities Routing region Requesting regionTarget region What does dynamic routing cost? The benets of dynamic routingTransaction affinities Inter-transaction affinity Transaction-system affinityAffinity relations GlobalAffinity lifetimes CICS programming techniques for transaction affinityUserid SystemSafe programming techniques Unsafe programming techniquesSuspect programming techniques Avoiding the effects of transaction affinityProtecting applications from one another What next? 8 CICS Transaction Affinities Utility GuideChapter 2. Introducing the Transaction Affinities Utility Important noteFigure 2. Affinity utility program components 10 CICS Transaction Affinities Utility GuideCommands detected by the Transaction Affinities Utility The Scanner component The Detector componentWhat is detected Worsening of transaction affinities relations What is not detectedWorsening of transaction affinities lifetimes Controlling the Detector How the affinity data is collectedSaving affinity data The affinity data VSAM les The control record VSAM leDetector performance The Reporter componentThe Builder component v A report presenting the affinity data in a readable formChapter 2. Introducing the Transaction Affinities Utility 20 CICS Transaction Affinities Utility Guide Creating the VSAM les Chapter 3. Preparing to use the affinity utility programEstimating the size of the MVS data space and VSAM les Dening the VSAM les to CICS Chapter 3. Preparing to use the affinity utility program 24 CICS Transaction Affinities Utility Guide Chapter 4. Running the Scanner Creating a summary reportv The JOB accounting parameters v The PARM statement $SUMMARYv The AFFMOD DD statement v The PARM statement Creating a detailed report$DETAIL Contents of a detailed report v The DETAIL DD statementv The STEPLIB DD statement v The INPUT DD statement± The total possible affinity commands ± The total possible MVS post commandsv A summary report of the modules, giving Figure 5 is an example of a detailed report produced by the Scanner30 CICS Transaction Affinities Utility Guide v Changing the state Chapter 5. Running the Detectorv Changing the options Displaying the Detector control screen When you can start collecting affinity data Starting the collection of affinity dataPausing the collection of affinity data When you can pause affinity data collectionWhen you can resume collecting affinity data Resuming the collection of affinity dataWhen you can stop collecting affinity data Stopping the collection of affinity dataChanging the Detector options v Restore data on start „1… The control options v Perform periodic saves„4… Last update by userid v Size of dataspacev Transid prex „2… Detect affinity typesDetector errors 40 CICS Transaction Affinities Utility Guide Chapter 6. Running the Reporter Requesting a report from the Reporterv The JOB accounting parameters v The PARM parameter of the EXEC statement For exampleOutput from the Reporter v The CMDGRPS DD statementv The TRANGRPS DD statement v The SYSPRINT DD statementFigure 8. A sample report output by the Reporter Part 1 of Affinity reportFigure 8. A sample report output by the Reporter Part 2 of Notes for Figure „1… Incorrect affinity types „2… Affinity types reported„3… Affinities reports TrangroupRecoverable CommandAffinity LifetimeProducing affinity transaction group denitions TerminalBTS Task Total TransactionsUsing the affinity report Understanding the affinities Modifying affinity transaction groupsv Remove false affinities v Remove affinity relation worseningCompressing affinity data v Remove affinity lifetime worseningv Change LUNAME affinity relation to USERID v Add WAIT affinitiesUsing the IBM Cross System Product SPI commandsAffinity analysis for a CICS region containing CSP 3.3 applications ENQUEUEs/DEQUEUEsDetailed affinity analysis ENQUEUE/DEQUEUETemporary storage queues GETMAIN SHARED52 CICS Transaction Affinities Utility Guide SPI commands 54 CICS Transaction Affinities Utility Guide Chapter 7. Running the Builder v The PARM parameter of the EXEC statementDSPSIZE=16number MATCH=LUNAMEUSERIDSyntax for input to the Builder v The REPGRPS DD statementv The AFFGRPS DD statement v The SYSPRINT DD statementHEADER statement. Otherwise comment lines are thrown away HEADER statements Output from the BuilderCombined affinity transaction group denitions 58 CICS Transaction Affinities Utility GuideCombining basic affinity transaction groups Builder produces a report that lists the combinations that occurred Data sets processed report Empty transaction groups reportGroup merge report LifetimeError report Figure 14. Sample group merge reportFigure 15. Sample error report 64 CICS Transaction Affinities Utility Guide Appendix A. Details of what is detected ENQ/DEQTS commands LOAD HOLD/RELEASERETRIEVE WAIT/START 66 CICS Transaction Affinities Utility GuideADDRESS CWA LOAD/FREEMAINGETMAIN SHARED/FREEMAIN CANCEL/DELAY/POST/START SPI commands WAIT commands70 CICS Transaction Affinities Utility Guide Appendix B. Correlating Scanner and Reporter output to source Reporter outputScanner output ExamplesExample 2±VS COBOL DFHEIV0To determine the EXEC CICS command For the Scanner outputThe COBOL source after translation was The equivalent Assembler-language is001126 MOVE 74 CICS Transaction Affinities Utility GuideCOBOL affinities LOGON or SYSTEM when PCONV expectedUnrecognized Transids 76 CICS Transaction Affinities Utility Guide Detector table manager diagnostics Appendix D. DiagnosticsFunction code values Table identier values Reason code values Detector CAFB request queue manager diagnostics Date formatter diagnosticsReason code values This sectionIndex A continued Page 84 CICS Transaction Affinities Utility Guide Sending your comments to IBM Program Number IBMRSC33-1777-02 Release CICS Transaction Affinities Utility GuideSpine information CICS TS for OS/390