IBM OS manual What is not detected, Worsening of transaction affinities relations

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v Log offs and sign offs by intercepting messages DFHSN1200, DFHZC3462, and DFHZC5966.

 

v Completion of CICS BTS activities and processes.

 

For more information, see ªAppendix A. Details of what is detectedº on page 65.

 

Worsening of transaction affinities relations

 

In some cases, the Detector may not detect enough occurrences (at least 10) of an

 

affinity command to be sure that the affinity is de®nitely with a terminal (LUNAME),

userid (USERID), or CICS BTS process (BAPPL). In such cases, the Detector

 

records the (worsened) affinity relation as GLOBAL instead of LUNAME or USERID.

 

Such relation worsening is ¯agged by the Detector and reported by the Reporter.

 

Worsening of transaction affinities lifetimes

 

If a pseudoconversation ends, and the resource still exists, the Detector deduces

 

that the lifetime is longer than PCONV, that is, one of LOGON, SIGNON, SYSTEM,

 

or PERMANENT.

 

If a log off or sign off occurs, and the resource still exists, the Detector deduces that

 

the lifetime is longer than LOGON or SIGNON: that is, either SYSTEM or

 

PERMANENT.

If a CICS BTS activity completes and the resource still exits, the lifetime is

worsened to process. If a CICS BTS process completes and the resource still exits,

the liftime is worsened to system.

 

In some cases, the Detector may not detect a log off or sign off, so cannot be sure

 

that the affinity lifetime is LOGON or SIGNON. In such cases, the Detector records

 

the (worsened) lifetime as SYSTEM or PERMANENT instead of LOGON or

 

SIGNON. For example, this occurs when the CICS region the Detector is running

on is a target region, because it is impossible in some cases to detect a log off or

sign off that occurs in a connected routing region.

 

Such lifetime worsening is ¯agged by the Detector, and reported by the Reporter.

 

What is not detected

The Detector does not detect EXEC CICS commands when the:

vDetector is not running

vIssuing program was translated with the SYSEIB option

vCommand is an EXEC CICS FEPI command

vCommand is not one that can cause transaction affinity

vProgram name starts with ªCAUº or ªDFHº

vProgram is a DB2 or DBCTL task-related user exit

vProgram is a CICS user-replaceable module

vTransaction identi®er does not match the pre®x, if speci®ed, for transactions to be detected

vCommand is not one of the affinity types speci®ed to be detected

vCommand is function shipped to a remote CICS region

vInter-transaction affinity commands are used within the same task

14 CICS Transaction Affinities Utility Guide

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Contents IBM Page IBM Third edition March Contents Appendix A. Details of what is detected Reporter output Scanner output Examples Vi Cics Transaction Affinities Utility Guide Vii Trademarks Preface Argument zero Bibliography Cics Transaction Server for OS/390Cics books for Cics Transaction Server for OS/390 CICSPlex SM books for Cics Transaction Server for OS/390 Other Cics booksSummary of changes Xiv Cics Transaction Affinities Utility Guide Introducing transaction affinities Affinities, see the Cics Application Programming GuideRequesting region Routing regionTarget region Benets of dynamic routing What does dynamic routing cost?Transaction affinities Affinity relations Inter-transaction affinityTransaction-system affinity GlobalAffinity lifetimes Cics programming techniques for transaction affinitySuspect programming techniques Safe programming techniquesUnsafe programming techniques Avoiding the effects of transaction affinityProtecting applications from one another What next? Introducing the Transaction Affinities Utility Important noteAffinity utility program components Commands detected by the Transaction Affinities Utility Scanner component Detector componentWhat is detected Detector componentsWhat is not detected Worsening of transaction affinities relationsControlling the Detector How the affinity data is collectedSaving affinity data Affinity data Vsam les Control record Vsam leBuilder component Detector performanceReporter component Report presenting the affinity data in a readable formIntroducing the Transaction Affinities Utility Cics Transaction Affinities Utility Guide Preparing to use the affinity utility program Creating the Vsam lesEstimating the size of the MVS data space and Vsam les Dening the Vsam les to Cics #termidsPreparing to use the affinity utility program Cics Transaction Affinities Utility Guide Running the Scanner Creating a summary reportAffmod DD statement Creating a detailed report Cics Transaction Affinities UtilityContents of a detailed report Is an example of a detailed report produced by the Scanner Cics Transaction Affinities Utility Guide Running the Detector Changing the stateChanging the options Displaying the Detector control screen CAFF01When you can start collecting affinity data Starting the collection of affinity dataWhen you can resume collecting affinity data Pausing the collection of affinity dataWhen you can pause affinity data collection Resuming the collection of affinity dataWhen you can stop collecting affinity data Stopping the collection of affinity dataChanging the Detector options CAFF02Restore data on start „1… The control options Perform periodic savesTransid prex „4… Last update by useridSize of dataspace „2… Detect affinity typesDetector errors Cics Transaction Affinities Utility Guide CAUAFF1, CAUAFF2, and CAUAFF3 DD statements Running the ReporterRequesting a report from the Reporter Caucntl DD statementsOutput from the Reporter Cmdgrps DD statementTrangrps DD statement Affinity report System„3… Affinities reports „1… Incorrect affinity types„2… Affinity types reported TrangroupAffinity RecoverableCommand LifetimeBTS Task Producing affinity transaction group denitionsTerminal Total TransactionsUsing the affinity report Afflifesystem Descaddress CWARemove false affinities Understanding the affinitiesModifying affinity transaction groups Remove affinity relation worseningCompressing affinity data ENQUEUEs/DEQUEUEs Using the IBM Cross System ProductSPI commands Shared storageDetailed affinity analysis ENQUEUE/DEQUEUEGetmain Shared SPI commands Cics Transaction Affinities Utility Guide Running the Builder DSPSIZE=16numberCONTEXT=plexname Syntax for input to the Builder Repgrps DD statementAffgrps DD statement Builder input syntax Header statements Output from the BuilderCombined affinity transaction group denitions Combining basic affinity transaction groups Relation a Relation B Resultant relation C Data sets processed report Empty transaction groups reportGroup merge report Error report Sample group merge reportSample error report Cics Transaction Affinities Utility Guide Appendix A. Details of what is detected ENQ/DEQTS commands Load HOLD/RELEASEAddress CWA CANCEL/DELAY/POST/START SPI commands Wait commandsCics Transaction Affinities Utility Guide Reporter output Scanner outputExamples Example 2±VS Cobol Which occurs for the rst Move Move Logon or System when Pconv expected Cobol affinitiesUnrecognized Transids Cics Transaction Affinities Utility Guide Appendix D. Diagnostics Detector table manager diagnosticsFunction code values Table identier values Reason code values Reason code values Detector Cafb request queue manager diagnosticsDate formatter diagnostics This sectionIndex Bappl Vsam Cics Transaction Affinities Utility Guide Sending your comments to IBM Ibmr IBM

OS specifications

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