Getting Started with IBM Data Studio for DB2

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156 Getting Started with IBM Data Studio for DB2 3. Highlight the Database Availability row and click Edit. 4. Ensure that the Enabled option is selected. 5. In the Critical section, deselect the Quiesced option. 6. In the Warning section, select the Quiesced option. 7. Click OK. After the monitoring refresh occurs on the Health Summary page, you will see the Data Server Status change from Critical (Red) to Warning (Yellow). The Warning Count should now be raised by 1. Do not be alarmed if the Critical Count is still showing 1. The counts are a cumulative (summary) history of how many alerts have occurred within the past xx minutes. If you select the critical alert, you will also see that there is now an end time for it, meaning that the alert has closed. The start-end time duration is the time during which this problem was present. Finally, follow these steps to un-quiesce the database: 1. Open a DB2 command window. 2. Connect to the database with the following command: db2 connect to GSDB 3. Unquiesce the database with the following command: db2 unquiesce db After the monitoring refresh occurs on the Health Summary page, you should see the Data Server Status change from Warning (yellow) back to Normal (green). The previous warning alert should also end. After the situation has returned to normal, you can still determine that the database was quiesced because this information is reflected in the summary counts, as well as in the Alert List page for that time duration. 4.10.5 Connections The Connections Alert warns you when there are too many connections to a database at the same time. By default, the Connections Alert is turned off, but preset to generate a warning alert if the number of connections detected is greater than or equal to 100, and a critical alert if greater than or equal to 150. Typically, you need to decide what number constitutes a critical level, and what constitutes a warning level. What may be a perfectly reasonable limit for one database may not be so for another database. For this exercise, follow these steps to lower the thresholds for the alert, so you don't have to create over 100 connections to trigger the alert: 1. Navigate to the Health Alerts Configuration page. 2. Select the database that you want to use for this scenario. 3. Highlight the Connections row and click Edit. 4. Select the Enabled option if it is not already selected.
Chapter 4 – Monitoring the health of your databases 157 5. Lower the values for Warning threshold to1, and Critical threshold to5. 6. Click OK. Connect to the monitored database from the DB2 command line, or from the Data Studio client, and leave the connections active. Once the monitoring refresh occurs on the Health Summary page, you should see the Connections status change from No Alerts to either Critical (red) or Warning (yellow), depending on how many connections are currently active on that database. If you close the connections to below the threshold value, this should close the alerts. Note that the critical or warning summary icon would still be present to indicate that there had been problems in that selected duration, but that these alerts now have an end time. This is unlike the Status summary icon with the Data Server Status alert category. Remember to reset this alert parameter (or disable the alert) to whatever is appropriate for your database when you finish with this exercise 4.11 Summary In this chapter, you've gotten a detailed look at the health monitoring features in Data Studio web console, and learned how to alter configurations to better suit your monitoring requirements for each database. You also learned how to try out some of the alerting features of Data Studio web console, as well as how to start the monitoring features from within Data Studio client. 4.12 Review Questions 1. Can you modify the threshold for the alerts supported by Data Studio web console? If so, how do you modify them? 2. List the different alerts supported by Data Studio web console. 3. How can you share the alerts generated by the web console with colleagues? 4. How can you open the Data Studio web console from Data Studio client?
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3 Notices This information was deve
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Table of contents 5 Table of conten
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3.3.1 Exporting data...............
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Chapter 7 - Tuning queries ........
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Preface 13 Keeping your skills curr
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around the world have participated
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17 About the authors Dimple Bhatia
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Contributors 19 The following peopl
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21 Acknowledgements The authors owe
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24 Getting Started with IBM Data St
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100 Getting Started with IBM Data S
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103 Chapter 3 - Maintaining the dat
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Chapter 6 - Managing jobs 209 6.6.2
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213 Chapter 7 - Tuning queries In t
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7.4.2 Run the Statistics Advisor an
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237 Chapter 8 - Developing SQL stor
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355 Appendix D - The Sample Outdoor
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Appendix E - Advanced topics for de
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E.5.4 Data web services artifacts A
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References 391 References [1] HAYES
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References 393 Books and articles 1
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396 Getting started with IBM Data S
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