1. IBM Software Group ® DB2 Performance Expert for Multiplatforms Version 2.1 Step-by-step tutorial

2. IBM Software Group | DB2 Information Management Software 2 Introduction  This presentation is part of the demo package that gets you started with DB2 Performance Expert for Multiplatforms V2.1.  The demo package consists of: Videos that show scenarios for monitoring DB2 performance with DB2 Performance Expert for Multiplatforms V2.1. A step-by-step tutorial (this presentation) that can be completed optionally and teaches you to: −Install and configure DB2 Performance Expert for Multiplatforms V2.1 on your Windows machine. −Run workload scripts that allow you to perform the scenarios presented in the videos. −To complete the step-by-step tutorial, you will probably need 2 hours. Continue on the next page with the step-by-step tutorial...

3. IBM Software Group ® Installing and configuring DB2 Performance Expert for Multiplatforms Version 2.1

4. IBM Software Group | DB2 Information Management Software 4 Getting started Installing DB2 Performance Expert Server 1.To install Performance Expert Server.  Create a user group on your local Windows operating system. In Windows XP: Select Start -> Control Panel -> Administrative Tools -> Computer Management. In Windows 2000: Select Start -> Settings -> Control Panel -> Administrative Tools -> Computer Management. Open the Local users and groups folder. Right-click Groups and click New group. Type in the Group name field where denotes a name of your choice. In the video and tutorial the name PE is used. Click Add. Type the user ID previously described. Click Create. Click Close. Close the Computer Management window.  During this tutorial use a user ID with the following privileges: Administrator rights in the Windows Operating System  Add this user ID to the user group that you have created in the first step. If you have a sysadm group specified in DB2, add the user ID to sysadm group aswell.  Start the db2pesrv.install-on-win.exe file.  Important: During the installation, you are asked whether you want to configure Performance Expert Server or finish the installation. Select Finish installation.  Don‘t change the current database manager instance of DB2 during this tutorial.

5. IBM Software Group | DB2 Information Management Software 5 Getting started Configuring DB2 Performance Expert Server 2.To configure Performance Expert Server:  Go to the bin subdirectory of your installation directory of Performance Expert Server.  Open the sample response file pesample.rsp in an editor.  Replace the placeholders for USER LOGIN NAME and USER PASSWORD with your user ID and password.  Open a Command Prompt window. Type db2cmd. In the new window, change to the bin subdirectory of your installation directory of Performance Expert Server. Type pesample and press Enter. This script file: −Creates the PEDEMO database. −Configures the local DB2 instance for monitoring. −Registers the PEDEMO database for monitoring. −Starts Performance Expert Server. The Command Prompt window remains open, displaying the message PE Instance status: alive.

6. IBM Software Group | DB2 Information Management Software 6 Getting started Installing and configuring DB2 Performance Expert Client 2.To install Performance Expert Client:  Start the db2pe.install-on-win.exe file. 3.To prepare the configuration of Performance Expert Client:  Find out the port number of the DB2 instance on which Performance Expert Server runs: In DB2 V8, open the DB2 Control Center. Right-click the DB2 instance on which Performance Expert Server runs. Click Setup communications. Click Properties (2). Write down the number displayed in the Port number field. Note: If no port has been assigned by default, click Default and write down the port number that is displayed.

7. IBM Software Group | DB2 Information Management Software 7 Getting started Installing and configuring DB2 Performance Expert Client 4.Start Performance Expert Client:  Click Start -> Programs -> IBM DB2 Performance Expert V2 -> IBM DB2 Performance Expert V2.  Choose Extended Design and click OK.

8. IBM Software Group | DB2 Information Management Software 8 1 Click New DB2 System. You can also use the toolbar or the menu for opening this dialog. 2 Select DB2 on Multiplatforms and click Next. 3 Type localhost and the port number you have written down in the previous step, and click Next. Continue on the next page... Getting started Configuring DB2 Performance Expert Client - Part 1 of 4

9. IBM Software Group | DB2 Information Management Software 9 4 Click Retrieve Monitored DB2 instances and type your DB2 user name and password. 5 The instances that are monitored by the specified Performance Expert Server are displayed in the table. 6 Type PE as the DB2 connection alias for the performance database of the monitored DB2 instance and click Finish. Continue on the next page... Getting started Configuring DB2 Performance Expert Client - Part 2 of 4

10. IBM Software Group | DB2 Information Management Software 10 7 Open the Monitored Objects folder in order to see the DB2 instance that you have just added. 8 Log on to the DB2 instance by using the Logon link or by right- clicking the DB2 instance. Continue on the next page... Getting started Configuring DB2 Performance Expert Client - Part 3 of 4

11. IBM Software Group | DB2 Information Management Software 11 9 Right-click the instance you have just configured and click Properties. 10 On the History page, enable the history data collection for locking conflicts by selecting the appropriate check box. On this page, you can specify the settings for recording history data. Continue on the next page... Getting started Configuring DB2 Performance Expert Client – Part 4 of 4 11 On the Performance Warehouse page, change the storage interval to 1 hour and the interval multiplier for summarizing the history data to 1. Then click OK. History data is then stored every hour. It is stored as delta values, where each delta covers a 15-minute interval.

12. IBM Software Group | DB2 Information Management Software 12 To start the workload script:  Copy the file demo.jar to the bin subdirectory of your installation directory of Performance Expert Server.  Open a Command Prompt window.  Change to the bin subdirectory of your installation directory of Performance Expert Server.  Type pedemo and press Enter.  Important: The six additional Command Prompt windows that appear after starting the workload program must remain open during the tutorial but can be minimized. Getting started Starting the workload script – Part 1 of 2

13. IBM Software Group | DB2 Information Management Software 13 Getting started Starting the workload script – Part 1 of 2  Let the workload script pedemo run for about one minute until it has created all objects, such as the buffer pools.  Press Ctrl-C to stop pedemo.  Type Y and press Enter.  Type db2cmd.  In the new window, type db2stop force and press Enter to stop the DB2 instance.  Type db2start and press Enter to start the DB2 instance.  Restart DB2 Performance Expert Server by clicking Start -> Programs -> IBM DB2 Performance Expert Server V2 -> Start Performance Expert Server  In the workload script command window, type pedemo and press Enter.  Important: The six additional Command Prompt windows that appear after starting the workload program must remain open during the tutorial but can be minimized. If you have DB2 Version 7 installed: In DB2 Version 7 new buffer pools are only available after restarting the DB2 instance. To make them available for this tutorial, do the following: You have now successfully installed and configured DB2 Performance Expert Server and Client and have started the workload script that allows you to monitor DB2 performance during the following scenarios.

14. IBM Software Group ® Performance scenarios

15. IBM Software Group | DB2 Information Management Software 15 Performance scenarios  The following performance scenarios are covered:  Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs for your most important performance values Analyzing a buffer pool problem  Scenario 2: Finding the cause of a deadlock Defining alert thresholds Analyzing the cause for a deadlock

16. IBM Software Group ® Scenario 1: Discovering and analyzing a buffer pool problem

17. IBM Software Group | DB2 Information Management Software 17 Scenario 1: Discovering and analyzing a buffer pool problem Monitoring the general performance of DB2 As a database administrator, you monitor the general performance of your DB2 system to find critical changes in the system. To do this, you can:  Configure graphs for your most important performance values. DB2 Performance Expert V2.1 allows you to keep an eye on your DB2 systems by using graphs for your most important performance indicators.  Define alert thresholds. Critical changes that exceed certain thresholds result in alerts, which you can receive via e-mail. In this first scenario, you configure graphs for important performance values.

18. IBM Software Group | DB2 Information Management Software 18 Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs for important performance values The following performance values are important indicators of your DB2 performance:  Buffer pool hit ratio  Failed and successful SQL statements  Sort overflows  Rows selected vs. Rows read  Number of deadlocks In general, it is always a good idea to keep an eye on these values. Therefore, you configure them as performance graphs in DB2 Performance Expert V2.1.

19. IBM Software Group ® Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs

20. IBM Software Group | DB2 Information Management Software 20 Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs - Buffer pool hit ratio 1 Click System Health for the DB2 instance that you have added to the System Overview window. You can also use the component list or the menu for opening System Health. 2 Click open a predefined data view. Continue on the next page...

21. IBM Software Group | DB2 Information Management Software 21 3 Select Compare Hit ratio of buffer pools in the list and click OK. 4 Select all four buffer pools in the list and click OK. You might see more than four buffer pools on your system. Select all buffer pools that are displayed. Continue on the next page... 5 The data view Compare Hit ratio of a buffer pools is being created. Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs - Buffer pool hit ratio

22. IBM Software Group | DB2 Information Management Software 22 6 Click the Autorefresh toolbar button to start data collection. 7 Click Legend to see the legend of the data view. Continue on the next page... Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs - Buffer pool hit ratio

23. IBM Software Group | DB2 Information Management Software 23 Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs – Failed & successful SQL statements 8 Right-click the Data Views folder in the System Overview tree and click Open Predefined Data View. 9 Select SQL stmt throughput and click OK. Continue on the next page... 10 Select PEDEMO and click OK. This window only appears if there is more than one database on the monitored DB2 instance.

24. IBM Software Group | DB2 Information Management Software 24 Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs – Sort overflows 11 Right-click the Data Views folder in the System Overview node and click Open Predefined Data View. 12 Select Sort overflows [%] and click OK. Continue on the next page... 13 Select PEDEMO and click OK. This window only appears if there is more than one database on the monitored DB2 instance.

25. IBM Software Group | DB2 Information Management Software 25 Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs – Rows selected vs. Rows read 14 Right-click the Data Views folder in the System Overview tree and click New. 15 Type Rows selected vs. Rows read in the Data view name field, select Databases as data view category, and click Next. Continue on the next page... 16 Select Compare counters of PEDEMO. From the Select counters list, select the Rows selected by SQL and Rows read by SQL check boxes. Click Not stacked as type of counter display and then click Next.

26. IBM Software Group | DB2 Information Management Software 26 Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs – Rows selected vs. Rows read 17 Select Dynamic scale for the y-axis and click Next. The y-axis then changes its scale to automatically adapt to the highest values of the counters. 18 Click Finish. Continue on the next page...

27. IBM Software Group | DB2 Information Management Software 27 Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs – Number of deadlocks Continue on the next page... 19 Right-click the Data Views folder in the System Overview tree and click New.... 20 Type Deadlocks in the Data view name field, select Databases as data view category, and click Next. 21 Select Compare counters of PEDEMO. From the Select counters list, select the Deadlocks detected check box, click Not stacked as type of counter display, and click Next.

28. IBM Software Group | DB2 Information Management Software 28 Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs – Number of deadlocks Continue on the next page... 22 Select Dynamic scale for the y-axis and click Next. The y-axis then changes its scale to automatically adapt to the highest number of deadlocks. 23 Click Finish.

29. IBM Software Group | DB2 Information Management Software 29 25 All data views in the System Overview folder are displayed in the System Overview window. Start and stop data collection by clicking the Autorefresh toolbar button. Click the System Overview toolbar button to navigate to System Overview. Continue on the next page... Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs 24 Select View  Tile Data Views to order all data views on the workspace.

30. IBM Software Group | DB2 Information Management Software 30 Continue on the next page... Scenario 1: Discovering and analyzing a buffer pool problem Configuring graphs You have successfully created five data views. 26 In the System Overview window, the data views are displayed. 27 Click Monitored Objects to see the data views of all systems to which you are logged on.

31. IBM Software Group ® Scenario 1: Discovering and analyzing a buffer pool problem Interpreting graphs

32. IBM Software Group | DB2 Information Management Software 32 Continue on the next page... Scenario 1: Discovering and analyzing a buffer pool problem Interpreting graphs The graphs in the System overview window allow you to keep an eye on the system. You can see that there is something wrong with one of the buffer pools.

33. IBM Software Group | DB2 Information Management Software 33 Continue on the next page... Scenario 1: Discovering and analyzing a buffer pool problem Interpreting graphs 5 SQL stmt throughput The SQL statement throughput is in good shape. There are no failed SQL statements, which would appear red in the graph. Failed statements can have different causes, e.g. failures in the SQLs generated by an application, or rollbacks e.g. after a deadlock. 2 Rows selected vs. Rows read The ratio of selected rows to read rows is relatively even which is a positive performance indicator. It shows that almost all data that is read from disk to memory is used by the applications. A large difference between the two counters results in bad performance. The reason could be e.g. a missing or ineffective index. 3 Deadlocks In the picture no deadlock appears. You might see deadlocks that are produced by the workload script. They will be the topic of Scenario 2. 4 Sort overflows None of the sorts (grey bars) had to overflow to disk which is a positive performance indicator. A high percentage of sort overflows results in poor performance and can be resolved by increasing the sortheap value. 1 Compare hit ratio of buffer pools. Click a bar of a data view to display its values. The hit ratio of buffer pool FRUITS is below 80%. After interpreting the other data views, you will analyze this problem. 1 2 3 4 5

34. IBM Software Group ® Scenario 1: Discovering and analyzing a buffer pool problem Finding the cause of the buffer pool problem

35. IBM Software Group | DB2 Information Management Software 35 Continue on the next page... Scenario 1: Discovering and analyzing a buffer pool problem Finding the cause of the buffer pool problem 1 Go to the bottom of the problem by right-clicking the data view Compare the Hit ratio of buffer pools and selecting Show in Statistics Details. You can also use the component list or the menu for opening Statistics Details.

36. IBM Software Group | DB2 Information Management Software 36 Continue on the next page... Scenario 1: Discovering and analyzing a buffer pool problem Finding the cause of the buffer pool problem 2 In the Buffer Pools pane of the Statistics Details window, double-click FRUITS. The buffer pools are not displayed if you are running on DB2 V7. In this case you have to refer to the DB2 Control Center to view the buffer pool sizes. See the next page for a screenshot. 3 Select Configuration in the tree and double- click the FRUITS entry.

37. IBM Software Group | DB2 Information Management Software 37 Scenario 1: Discovering and analyzing a buffer pool problem Finding the cause of the buffer pool problem 4 You discover that the current size of buffer pool is very small and decide to enlarge it using a DB2 utility of your choice, such as DB2 Control Center. The size of the buffer pool on your system might differ from the sizes displayed in the screenshot. You have successfully detected and analyzed a buffer pool problem. If your system is running on DB2 V7 you find the buffer pool sizes in the DB2 Control Center.

38. IBM Software Group | DB2 Information Management Software 38 Scenario 1: Discovering and analyzing a buffer pool problem In this scenario, you learned how to:  Create predefined and new performance graphs  A set of five important performance indicators was introduced that you can use for future monitoring.  Go to the bottom of a problem in statistics.

39. IBM Software Group ® Scenario 2: Finding the cause of a deadlock

40. IBM Software Group | DB2 Information Management Software 40 Scenario 2: Finding the cause of a deadlock Starting monitoring the general performance of DB2 You have learned that you can monitor the general performance of your DB2 system by:  Configuring graphs for your most important performance values  Defining alert thresholds In scenario 1, you have configured graphs. In scenario 2, you will define alert thresholds for important performance values.

41. IBM Software Group ® Scenario 2: Finding the cause of a deadlock Defining alert thresholds

42. IBM Software Group | DB2 Information Management Software 42 In DB2 Performance Expert for Multiplatforms V2.1, you can perform periodic and event exception processing. Periodic exception processing compares the values of your performance counters to thresholds that you have set for the values and alerts you if a threshold is exceeded. Event exception processing alerts you as soon as a DB2 event occurs on your system. Currently, you can monitor the DB2 event „Deadlock“. You define alert thresholds for the following performance values:  Buffer pool hit ratio  Failed SQL statements  Sort overflows  Deadlocks Scenario 2: Finding the cause of a deadlock Defining alert thresholds Periodic Exception Processing Event Exception Processing

43. IBM Software Group | DB2 Information Management Software 43 Scenario 2: Finding the cause of a deadlock Defining alert thresholds 1 In the System Overview window, click Tools –> Exceptions –> Exception Processing to open the Exception Processing window. 2 In the Exception Processing tree, you can define and activate event exception processing and define threshold sets for periodic exception processing. You first create a threshold set and define tresholds for it. Continue on the next page...

44. IBM Software Group | DB2 Information Management Software 44 Scenario 2: Finding the cause of a deadlock Defining alert thresholds – Threshold Set (periodic) 3 In the Exception Processing window, click Exception Processing –> New Threshold Set. 4 Select Multiplatforms as operating system and type General Performance as threshold set name and pedemo as author. Click OK. Continue on the next page... 5 Click the Create a new threshold toobar button. You can also use the menu to create a new threshold.

45. IBM Software Group | DB2 Information Management Software 45 Scenario 2: Finding the cause of a deadlock Defining alert thresholds – Threshold set (periodic) – Buffer pool hit ratio Continue on the next page... 6 Select Statistics, Buffer Pools, and Buffer Pools Hit ratio (%). Select <. Type 90 as warning threshold and 80 as problem threshold. Type PEDEMO as a qualifier for Buffer Pools Database Name. Click the Add button (right arrow). Click OK. 7 The first threshold appears in the threshold set table. Click the Create a new threshold toolbar button.

46. IBM Software Group | DB2 Information Management Software 46 Scenario 2: Finding the cause of a deadlock Defining alert thresholds – Threshold set (periodic) – Failed SQL statements Continue on the next page... 8 Select Applications, SQL Activity, and Statements Failed operations. Select >. Type 1 as warning threshold and 2 as problem threshold and select per minute. Type PEDEMO as a qualifier for Database DB name. Click the Add button (right arrow). Click OK. 9 Click the Create a new threshold toolbar button.

47. IBM Software Group | DB2 Information Management Software 47 Scenario 2: Finding the cause of a deadlock Defining alert thresholds – Threshold set (periodic) – Sort overflows Continue on the next page... 10 Select Applications, Sort, and Sort overflows. Select >. Type 5 as warning threshold and 10 as problem threshold and select by percentage. Type PEDEMO as a qualifier for Database DB name. Click the Add button (right arrow). Click OK. 11 Click Threshold Set  Close. In the message that appears, click Yes.

48. IBM Software Group | DB2 Information Management Software 48 Scenario 2: Finding the cause of a deadlock Defining alert thresholds – Activation Continue on the next page... 12 Right-click DB2 in the DB2 System table and click Activation. 13 Select the threshold set General Performance, type 1 as the interval multiplier, and click Start Periodic Exception Processing. 14 Click Start Event Exception Processing. 15 You have successfully started event and periodic exception processing. Click Close.

49. IBM Software Group | DB2 Information Management Software 49 Scenario 2: Finding the cause of a deadlock Viewing the exception log and changing settings Continue on the next page... 16 In the Exception Processing window, you can click Exception Processing in the tree and view both the event and the periodic exception log.

50. IBM Software Group | DB2 Information Management Software 50 Scenario 2: Finding the cause of a deadlock Viewing the exception log Continue on the next page... 17 If an exception appears in the log table, you can double-click it to view exception details.

51. IBM Software Group | DB2 Information Management Software 51 Scenario 2: Finding the cause of a deadlock Changing settings in exception processing Continue on the next page... 18 By clicking Exception Processing –> Settings, you open the Exception Settings window. Here, you can define how many exceptions are kept and the notification settings for event and periodic exceptions. You can also set up an e-mail notification for the exceptions that occur.

52. IBM Software Group ® Scenario 2: Finding the cause of a deadlock Analyzing deadlock events

53. IBM Software Group | DB2 Information Management Software 53 Scenario 2: Finding the cause of a deadlock Detecting a dead lock event Continue on the next page... 2 Deadlock events appear at regular intervals. 1 Click the System Overview toolbar icon to navigate to System Overview.

54. IBM Software Group | DB2 Information Management Software 54 Scenario 2: Finding the cause of a deadlock Detecting a dead lock event Continue on the next page... 3 Double-click a deadlock to see its details. 5 Double-click Performance Warehouse – Expert. 4 For each application involved in the deadlock, you can view the SQL in the Deadlock Details window. Because you have not programmed the application, the SQL might not give you enough information to understand the reason for the deadlock. But because the deadlocks occur regularly, you can collect SQL activity data to find out more about them when they appear.

55. IBM Software Group | DB2 Information Management Software 55 Scenario 2: Finding the cause of a deadlock Collecting SQL activity data Continue on the next page... 6 Open the Multiplatforms folder, right-click the Process Groups folder, and click Create. 7 Type pedemo deadlock as group name and click OK.

56. IBM Software Group | DB2 Information Management Software 56 Scenario 2: Finding the cause of a deadlock Collecting SQL activity data Continue on the next page... 8 Right-click the public process DB2PM.Template.SQL Activity CRD for Queries and click Copy to copy it to your pedemo folder. CRD stands for Collect Report Data. 9 Click OK.

57. IBM Software Group | DB2 Information Management Software 57 Scenario 2: Finding the cause of a deadlock Collecting SQL activity data Continue on the next page... 10 Right-click the CRD step of the SQL Activity CRD for Queries process and click Properties. 11 On the Options page of the CRD Step Properties window, select PEDEMO as database name, type 00:20:00 (= 20 minutes) for the elapsed time, and click OK.

58. IBM Software Group | DB2 Information Management Software 58 Scenario 2: Finding the cause of a deadlock Collecting SQL activity data Continue on the next page... 12 Right-click the Load step of the SQL Activity CRD for Queries process and click Properties. 13 On the Options page of the Load Step Properties window, select the Retrieve the text of the static SQL statements check box and click OK.

59. IBM Software Group | DB2 Information Management Software 59 Scenario 2: Finding the cause of a deadlock Collecting SQL activity data Continue on the next page... 14 To start the collection of data, right-click the process SQL Activity CRD for Queries and click Execute. 15 Click Close.

60. IBM Software Group | DB2 Information Management Software 60 Scenario 2: Finding the cause of a deadlock Collecting SQL activity data Continue on the next page... 16 Click Process Executions to see the execution of the process you have just started. 17 Double-click the execution SQL Activity CRD for Queries in the table. 18 In the Process Execution Details window, you see the status of the process step. – It is currently running. 19 Because you want to collect data about a deadlock while it occurs, you return to the System Overview window to monitor the occurrence of the deadlocks. Click the System Overview toolbar button.

61. IBM Software Group | DB2 Information Management Software 61 Scenario 2: Finding the cause of a deadlock Collecting SQL activity data Continue on the next page... 20 Wait until a new deadlock occurs... 21 Double-click the deadlock event. 22 Deadlock details are shown in this window. Click the Application tabs to view the details, for example the SQL, of the two applications that are involved in the deadlock.

62. IBM Software Group | DB2 Information Management Software 62 Scenario 2: Finding the cause of a deadlock Collecting SQL activity data Continue on the next page... 23 Copy (Ctrl+C) the application IDs of the two applications that cause the deadlock into a Notepad document. Click Close. 24 Click Performance Expert Warehouse – Expert to return to the Performance Warehouse window.

63. IBM Software Group | DB2 Information Management Software 63 Scenario 2: Finding the cause of a deadlock Collecting SQL activity data Continue on the next page... 25 Now that you know that a deadlock has occurred while the data was collected, click Stop to stop the collection of SQL activity data. 26 Wait until the CRD and LOAD steps complete successfully. Click Cancel. You have now successfully collected the data you need to analyze by running a query on it.

64. IBM Software Group | DB2 Information Management Software 64 Scenario 2: Finding the cause of a deadlock Analyzing the collected SQL Activity data by running a query Continue on the next page... 27 Right-click Query groups and click Create. 29 To define a query, right-click Queries under the pedemo deadlock folder and click Create. 28 Type pedemo deadlock as query group name and click OK.

65. IBM Software Group | DB2 Information Management Software 65 Scenario 2: Finding the cause of a deadlock Analyzing the collected SQL Activity data by running a query Continue on the next page... 30 Type pedemo deadlock SQL details as query name and click the Definition tab. 31 Select the blue SQL statement in the text box to the right of this presentation page, copy it (Ctrl+C) and replace the text under Query with it (Ctrl+V). Click OK. Many users already have their own performance queries and can reuse these queries with Performance Warehouse – Queries. SELECT OP.START_TIME, OP.STOP_TIME, OP.APPL_ID, CASE OP.STMT_OPERATION WHEN 1 THEN 'Prepare' WHEN 2 THEN 'Execute' WHEN 3 THEN 'Execute Immediate' WHEN 4 THEN 'Open' WHEN 5 THEN 'Fetch' WHEN 6 THEN 'Close' WHEN 7 THEN 'Describe' WHEN 8 THEN 'Static Commit' WHEN 9 THEN 'Static Rollback' WHEN 10 THEN 'Free Locator' WHEN 11 THEN 'Prepare to commit (2-phase commit)' WHEN 12 THEN 'Call a stored procedure' WHEN 15 THEN 'Select' WHEN 16 THEN 'Prep. and open (DB2 Connect only)' WHEN 17 THEN 'Prep. and execute (DB2 Connect)' WHEN 18 THEN 'Compile (DB2 Connect only)' END AS STMT_OPERATION, TXT.STMT_TEXT, OP.STMT_ID, OP.STMT_TEXT_ID, OP.AGENT_ID, OP.NODE_NUMBER FROM PWH.EVM_STMT_OPERATIONS AS OP LEFT OUTER JOIN PWH.EVM_STMT_TEXTS AS TXT ON OP.STMT_TEXT_ID = TXT.STMT_TEXT_ID AND OP.LL_ID = TXT.LL_ID WHERE OP.LL_ID = :ll_id AND OP.APPL_ID in (':appl1', ':appl2') ORDER BY OP.START_TIME

66. IBM Software Group | DB2 Information Management Software 66 Scenario 2: Finding the cause of a deadlock Analyzing the collected SQL Activity data by running a query Continue on the next page... 32 Right-click pedemo deadlock SQL details and click Execute to run the query that you have just defined. 33 Before the query can be executed, the correct execution log and the application IDs of the application involved in the deadlock have to be specified. Click Time for the execution log number.

67. IBM Software Group | DB2 Information Management Software 67 Scenario 2: Finding the cause of a deadlock Analyzing the collected SQL Activity data by running a query Continue on the next page... 34 Write down the number (11) of the step log of the collected data. The start and end times help you identify the correct time frame. This number specifies the execution log of the collected SQL activity data. Click Variables. 35 The variables that are contained in the query SQL statement have to be specified in this window. Type the number of the step log as the value for :ll_id. Paste in the application IDs that you copied into a text document in step 23 of this scenario. – The order is arbitrary. Click Execute.

68. IBM Software Group | DB2 Information Management Software 68 Scenario 2: Finding the cause of a deadlock Analyzing the collected SQL Activity data by running a query 36 The result table shows you the sequence of the SQL statements that are involved in the deadlock. This allows you to analyze the reason for the deadlocks and enables you to change the SQL. – You can see that the two applications are accessing the same two tables at the same time and therefore lock each other. 37 You can save this information and, for example, send it to the developer of the applications so that the applications can be analyzed. Click Save. You have successfully detected and analyzed a deadlock problem.

69. IBM Software Group | DB2 Information Management Software 69 Scenario 2: Finding the cause of a deadlock In this scenario, you have learned how to:  Configure and activate event and exception processing.  Collect SQL activity data with the help of Performance Warehouse reports.  Analyze collected data with Performance Warehouse queries.

70. IBM Software Group | DB2 Information Management Software 70 Cleaning up your system after the tutorial – Part 1of 3  Stop the demo activity Seven Command Prompt windows have been opened during the tutorial: six windows that update the monitor switches and one window that displays the current demo activity. To stop the demo activity:  Return to the Command Prompt window that displays the demo activity and press Ctrl+C.  The console prompts you with Terminate Batch job (Y/N)? Type Y and press Enter.  Type exit and press Enter to close the Command Prompt window.  In the other six Command Prompt windows for the monitor switches, type exit or click the Close button.

71. IBM Software Group | DB2 Information Management Software 71 Cleaning up your system after the tutorial – Part 2 of 3  Exit DB2 Performance Expert Client  In Performance Expert Client, press Ctrl+Q.  If there are tasks running on Performance Expert Server, you are asked whether to you want to stop or continue them. Select Stop running tasks and click Yes.  Stop DB2 Performance Expert Server  On your Windows system, select Start  Programs  IBM DB2 Performance Expert Server V2  Stop Performance Expert Server.

72. IBM Software Group | DB2 Information Management Software 72 Cleaning up your system after the tutorial - Part 3 of 3  Uninstall DB2 Performance Expert Client and Server  On Windows XP: Select Start  Control Panel  Add/Remove Programs.  On Windows 2000: Select Start  Settings  Control Panel  Add/Remove Programs  Select IBM DB2 Performance Expert Client and click Remove. Follow the instructions of the uninstallation wizard.  Select IBM DB2 Performance Expert Server and click Remove. Follow the instructions of the uninstallation wizard. Select Invoke the unconfiguration utility when you are asked during uninstall.  Remove the PEDEMO database  Open a Command Prompt window.  Type db2cmd.  In the new window, type db2 drop database pedemo and press Enter.