Investigating an Active Threads Alert | Candle-lite DB2 specification

Investigating an Active Threads Alert

Investigating an Active Threads Alert

IntroductionThis is an example of how you might investigate a red light from the System Status panel. You can use this information to help you understand how to use the features of OMEGAMON to resolve other DB2 subsystem problems.

Active threads alert

In this example, the Active Threads alert on the System Status panel has turned red.

■Select Active Threads with the A (Analyze Problems) action code, and press Enter. Result: The Analyze Problems window appears.

KD2APROB

Analyze Problems

System D41B

For additional information move cursor to a threshold entry, then press Enter

Threshold Description		Type	Current		Warning			Critical		Rule
----------------------		-----	----------		---------			--------		----
Plan: DSNTIB31	Connid: BATCH		Corrid: TDO214MI				Authid: TDO214
Update commit		COMT	0		0			1		None
In-DB2 time		IDBT	18	s	5	s		6	s	None
Synch read	I/O rate	RIO	12.5 s		10	s		12	s	None
Plan: K02510HP	Connid: DB2CALL Corrid: D2DB020						Authid: D2DB020
Update commit		COMT	0		0			1		None
Thread elapsed time		ETIM	4041		2			3		None
In-DB2 CPU	time	IDBC	4		0			1		None
F1=Help F3=Exit **=Bkwd F8=Fwd F10=Action Bar					F15=System Status

The Analyze Problems panel shows the exceptions that tripped for Active Threads and caused the status alert. The current value for each tripped exception is highlighted or appears in either yellow (warning status) or red (critical status).

Note: You can use the A action code only for components with a warning or critical status.

Exception recommendations

For an explanation of an exception that appears on the Analyze Problems window and for a recommendation about how to resolve the problem that caused the exception to trip:

■Move the cursor to the threshold description, and press F1.

Investigating the exception condition

To continue investigating a tripped exception:

■Move the cursor to a threshold description, and press Enter.

Result: A panel appears showing information related to the tripped exception.

Using OMEGAMON II

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Candle-lite DB2 manual Investigating an Active Threads Alert, Active threads alert, Exception recommendations

Contents

User’s Guide CUA Interface Omegamon II for DB2 User’s Guide CUA Interface, Version Contents Index 129 List of Figures Omegamon II for DB2 User’s Guide CUA Interface, Version Preface About This Book Where to look for informationWho should read this book Documentation set information Introduction Printing problems?Adobe Portable Document Format Documentation Conventions REPORT=SUMMARY Histogram Background Candle Customer Service and SatisfactionCandle Customer Service and Satisfaction contacts Page Omegamon II for DB2 User’s Guide CUA Interface, Version New IFCID-based reports Historical Reporter redesign Long name support Bit addressing supportUnicode support Enclave support Distributed Thread display improvements New Dsnzparm fields Omegamon II for DB2 User’s Guide CUA Interface, Version Introduction Chapter Contents Signing On Where applid is the application nameLogging on to the application Sign On panel Sign On panel fields Accessing Omegamon from OmegaviewFields of the Sign On Panel are defined in the table below Field Description Logon Options panel fields Setting Logon Options Logical rows Number of logical rows Returning to Omegaview from Omegamon Signing Off Part Feature Description Panel FeaturesPanel features Part Feature Description Description Data PanelsHighlighted data fields Scrolling Pushbuttons Fast pathing from the action bar Action BarSelecting from the action bar Actions pull-down View pull-down GoTo pull-down Help pull-down Options pull-downTools pull-down Action Codes Using an action codeAvailable action codes You can use these action codes in Omegamon Function Keys Default function key assignments are listed belowFunction key assignments Function Name Assignment Key PA1 CUA/TSOOmegaview PA2 Omegaview Help from a panel Getting HelpHelp from the action bar Help menu provides the following selections If you are Using the GlossarySearching the glossary Help function keys Customizing Omegamon Introduction Using the Preferences window Accessing the Preferences windowTo access the Preferences pop-up window Specifying Panel Preferences Action to occur Specifying Terminal Options Accessing the Terminal Options windowUsing the Terminal Options window Manual Values for SQL Description Process LevelAuto Save Saving to a profile Saving Terminal OptionsSaving for current session Accessing the Thresholds window Setting ThresholdsUsing the thresholds windows Follow these steps to change threshold values Saving threshold values Assigning User Authorities Accessing user authoritiesAdding a user Deleting a user Maintaining Profiles Accessing profile maintenanceProfile types Omegamon II uses three different profiles Copying a profile D61A$DEFAULT Exporting a Profile Importing a ProfileDeleting a profile Modifying a profile description Using the Dynamic Profile Update Facility Switching profiles Example command for importing a profile Example command for exporting a profileMVS Modify command for exporting a profile is as follows MVS Modify command for importing a profile is as follows Accessing the Filter Options window Setting Filtering Options for Near-Term Thread HistoryUsing the Filter Options window To access the Filter Options pop-up window Time Specifying Save Options for SQL Text Accessing the Save SQL Text Parameters windowUsing the Save SQL Text Parameters window Set up the CUA options Set up the !DB/EXPLAIN options Using the Callable Interface Setting Up the CUA Options Setting Up !DB/EXPLAINSQLID.PLANTABLE Step Action Log onto CUA Use the following procedure to set up the D2/EXPLAIN options Setting Up the D2/EXPLAIN Options Text and invokes the Explain function Append Use the following procedure to Explain SQLEXPLAINing SQL Code CPU % Press the Process SQL key Page This chapter describes how to use Omegamon Using Omegamon Monitored objects Monitoring from the System Status PanelDB2 subsystem components Alert notification Status indicatorsInvestigating an alert Color Status Performing actions from the System Status panel Description Code Explanation System Status Components and Related ExceptionsCics exceptions TSO exceptions IMS exceptionsBackground exceptions Utility exceptions Following exceptions apply to active threads Active thread exceptions Following exceptions apply to buffer pool resources Inactive thread exceptionsBuffer pool exceptions Lock statistics exceptions EDM pool exceptionsLog manager exceptions DDF statistics exceptions Lock exceptions DB2 activity exceptionsFollowing exceptions apply to DB2 activity alerts Following exceptions apply to lock alerts Active trace exceptions Volume activity exceptionsStored procedures exceptions User-defined functions exceptions Triggers exceptionsFollowing exceptions apply to alerts relating to triggers Following exceptions apply to user-defined functions Active threads alert Investigating an Active Threads AlertException recommendations Investigating the exception condition Modifying thresholds Evaluating and Modifying ThresholdsDisplaying all exceptions Adding or modifying rules Thread activity for a reporting period Accessing near-term history dataReviewing Near-Term History Data Thread activity for a report interval Specifying background application trace options Initiating a background application trace Identifying the dataset to which trace data is written Size Size of the dataset in megabytes VolumeViewing the list of background traces Name of the dataset you want to create Activities you can perform in a background trace request Starting an Ifcid Trace Using the Ifcid Trace FacilityOverview Displaying Ifcid Trace Data Stopping an Ifcid Trace Page Using Omegamon II for DB2 Functions provided by !DB/EXPLAIN for DB2 Background about !DB/EXPLAIN for DB2 Assumptions Using Omegamon II and !DB/EXPLAIN Complementary FunctionsWhen to use the complementary functions Using Omegamon II and !DB/EXPLAIN Complementary Functions Using the Omegamon II for DB2 Callable Interface Testc Current Sqlid is determined by the DB2 security exit Fields for Terminal Description Options SQL Text ATF. You can access the SQL Text panel through Required fields for the SAVE/EXPLAIN option SAVE/EXPLAIN PDS Using the D2/EXPLAIN Options Panel From the other !DB/EXPLAIN report sections that follow Press the Process SQL key Modes of operation Moving Interactively between !DB/EXPLAIN and OmegamonWhat functions can you use? What happens when you cancel the Omegamon II session? Prerequisites for real time accessProcedure to use the full function of !DB/EXPLAIN Capturing SQL from a running thread Using the Copy-and-Paste Facility in OmegamonPrerequisites to using the copy-and-paste facility Capturing SQL using the ATF Direction of access Accessing Omegamon II Trace Information from !DB/EXPLAINPrerequisites for using the Omegamon II trace information Procedure to obtain current trace information Task You Want to Perform Source of Information Sources of informationPage Appendix Contents Panel Navigation Flowcharts Element Description Flowchart ConventionsSystem Status panel DB2 System Status Workloads Panels TSO CicsIMS Cics IMS TSO Workloads Panels Near-term history Resources Panels Resources Panels Realtime Resources Panels Near-Term History Alerts Panels Alerts Panels Installation Parameters Panels Installation Parameters Panels Application Trace Facility Panels Application Trace Facility Panels Object Analysis Panels Object Analysis Panels Thread Detail GoTo Panels Thread Detail GoTo Panels Realtime Thread History Detail GoTo Panels Near-Term History Index Omegamon II for DB2 User’s Guide CUA Interface, Version 131 Omegamon II for DB2 User’s Guide CUA Interface, Version