March 2006
Intermediate to advanced
630 pages
14h 45m
English
book
DB2 Performance Expert for Multiplatforms V2.2, 2nd Edition
by Whei-Jen Chen, Ute Baumbach, Marcia Miskimen, Werner Wicke
Content preview from DB2 Performance Expert for Multiplatforms V2.2, 2nd Edition
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Appendix C. DB2 Performance Expert For Business Intelligence 565
Figure C-42 View data skew in pie chart
566 DB2 Performance Expert for Multiplatforms V2.2
Other skews
The group view feature of PE provides ways to look for skews on many more
performance indicators. As an example, Figure C-43 shows how to check for
skews on DB2 I/O data, such as rows read and rows selected.
Figure C-43 Checking skews on DB2 I/O data
In this example figure, two partitions deviate from the average rows read per
selected number. Partition 0 returns almost each row ...
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