Getting Started with IBM Data Studio for DB2

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228 Getting Started with IBM Data Studio for DB2 Figure 7.17 – Viewing Statistics Advisor options or recommendations An example of the Statistics Advisor recommendation details are shown in Figure 7.18. • RUNSTATS commands stored on data server contains the previous RUNSTATS commands stored in the statistics profile; otherwise, this area will be blank. • Recommended RUNSTATS commands contains new recommended RUNSTATS commands. The advisor is able to recommend statistics it deems to be missing that the DB2 optimizer can make use of to improve the query access plan. These recommended statistics can include distribution statistics and column groups for base tables and materialized query tables. • Statistics Advisor report contains more details on the recommendation.
Chapter 7 – Tuning queries 229 Figure 7.18 – Statistics Advisor recommendations When you are satisfied with the recommendation and want to proceed with executing on it, you can select the green “run” icon ( commands. 7.4.4 Review the query tuner report ) as shown in Figure 7.18 to run the RUNSTATS You can view a text version of these advisors and tools in HTML format by selecting Open Summary Report as shown in Figure 7.19. The information in this report includes access plan information, such as the tables accessed, all columns of that table, statistics, indexes, and predicates. Also included are the RUNSTATS recommendations from the Statistics Advisor. You can pass this report to other users to share and compare results.
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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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11.4 Community and resources ......
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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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159 Chapter 5 - Creating SQL and XQ
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Chapter 5 - Creating SQL and XQuery
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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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