December 2002
Intermediate to advanced
292 pages
6h 6m
English
Content preview from DB2 Recovery Expert for Multiplatforms
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Chapter 5. Log analysis 79
It causes DB2 to log full-row images for each UPDATE statement. Without this
option, DB2 only logs information about the changes caused by an UPDATE
statement.
In most circumstances, we do not recommend enabling DATA CAPTURE
CHANGES, because the extra logging overhead is too great. However, you may
want to enable it in the following circumstances:
If it is absolutely critical that the authid is included in log analysis reports, or
that you need to be able to specify authid as a report option.
In this case you have no choice. The only way to cause DB2 to log the authid
is to enable DATA CAPTURE CHANGES.
If UPDATE activity is low.
If you have an environment where the main SQL activity is INSERTs and
DELETEs compared ...
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