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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Chapter 5. Features and functions - long-term monitoring 309
There is currently a restriction when printing the HTML buffer pool reports. The
print is restricted to the width of the screen; therefore the information on the right
can only be viewed online.
The DB2 buffer pool snapshot command returns a number of different direct
buffer pool data items. The Buffer Pool Analysis Report holds a subset of these,
plus some other derived values. Derived values are averages and ratios that are
based on the raw data.
For example, the buffer pool hit ratio is derived from the formula:
( 1 - ( ( BUFFERPOOL.POOL_DATA_P_READS + BUFFERPOOL.POOL_INDEX_P_READS ) / (
BUFFERPOOL.POOL_DATA_L_READS + BUFFERPOOL.POOL_INDEX_L_READS ) ) ) * 100
The Advanced DBA Cer ...
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