Using the Product in a Java Virtual Machine (JVM) Environment › Analyze JVM Data

Analyze JVM Data

When CA Mainframe Application Tuner detects Java Virtual Machine (JVM) activity, the major category (Java Virtual Machine) and minor delay category (JVMPI Trace Activity) are assigned.

In order to collect detail Java application information, the Java support must be installed for the environment.

See the Installation Guide.

To see the JVM statements for an JVM activity:

1. Set up your monitoring criteria.
2. Invoke the monitor by using the I (Invoke) line command.
3. Analyze the data by using one of the analysis line commands, A, AL, AA, or AW.
4. From the Interactive Analysis menu, select Option 2.

   The DelayView panel displays:

   CA MAT -------------------------- DelayView ----------------- Row 1 to 9 of 9
   COMMAND ===>                                                  SCROLL ===> HALF
                                                                          
   Primary commands: DETail on/off           Module: *          Profile: JVM1    
                     ADDHelp                  Csect: *          Options: NORMAL  
                                             Offset: *           Detail: ON      
      Line commands:  A - Address                                         
   (AutoNav enabled)  S - Distribution                                    
                                                                          
   LC Major category       Minor category       Actv%  Wait%  Totl%  Visual       
      ____________________ ____________________ ______ ______ ______ _____________   
   -------------------------------------------------------------------------------
   __ Java Virtual Machine JVMPI Trace Activity  58.27   0.00  58.27 =========>   
   __ Voluntary Wait       Wait/Waitr SVC         1.27  19.38  20.65 ==>  
   __ Program Active       Program Active        12.02   0.00  12.02 =>   
   __ CICS Program Ctl Del Loader Delay           0.00   8.35   8.35 >    
   __ ESR SVC 122 (TYPE2)  Unknown function       0.14   0.00   0.14     
   __ Program Load Delay   LOAD SVC 122-9         0.14   0.00   0.14      
   __ Resource Conflict    Global Serialization   0.14   0.00   0.14     
   __ System Active        Restore SVC            0.14   0.00   0.14      
   __ Unix System Services loadhfs (BPX1LOD)      0.14   0.00   0.14      
   ***************************** End of Table *******************************
   

   It is important to note that the activity percentage values indicate the activity for all detected JVM activity and do not correspond with sample-based activity percentages that are displayed elsewhere by CA Mainframe Application Tuner.

5. Position the cursor and press Enter to autonavigate from the DelayView panel to display the JVM Applications panel.

   If you autonavigate from the TranView Delay Detail panel, only the JVM activity that is associated with the selected transaction is reported.

   You can also select Option 12 - JVM - Java Virtual Machine from the Interactive Analysis menu to display the JVM Applications panel.

   CA MAT ------------------ JVM Applications ----------------- Row 1 to 3 of 3 
   COMMAND ===>                                                SCROLL ===> HALF  
                                                                          
   Primary commands: MOde Process/Application/Via/Current       Profile: JVM1    
                                                                Options: NORMAL  
      Line commands: A - Application Methods    T - Threads        Mode: Process 
                     V - Via Methods           NI - JVM Info       Tran: *
                     C - Current Methods                                  
                                                                          
                 JVM     JVM                                              
   LC Process ID Release Information                              Pct%  Visual    
      __________ _______ ________________________________________ _____ __________
   -------------------------------------------------------------------------------
   __   33555438 1.4.2   J2RE 1.4.2 IBM z/OS Persistent Reusable  50.00 =========>
   __   16778231 1.4.2   J2RE 1.4.2 IBM z/OS Persistent Reusable  42.48 =======>  
   __   33555444 1.4.2   J2RE 1.4.2 IBM z/OS Persistent Reusable   7.52 > 
   ********************************* End of Table ********************************
   

The fields that are displayed on this panel are described next.

Process ID

Displays the identification numbers or the processes that are monitored by using a Java Virtual Machine.

JVM release

Displays the release level of the Java Virtual Machine (obtained from java.vm.version).

JVM Info

Displays the Java Virtual Machine System Properties (obtained from java.vm.info).

Pct%

Displays the percentage of all JVM activity measured where CA Mainframe Application Tuner detected program code to be executing.

This value is calculated based on the total of JVM activity, not the total number of samples. First volume serial of the data set.

Visual

Displays a visual depiction of the Pct% value.