At times it is faster to do a complete refresh of an oracle snapshot rather
than an incremental (fast). My question is how do you know when to do the
complete? For example, there are times when a user will run a conversion and
they may update 10% of the rows in the master table. If I do a fast refresh
it may take 4 hours but if I did a complete it takes 2 hours. I have not seen
a pattern in determing the breakeven point. For example, one table we may
update 20% of the rows and the incremental is faster other times we update 5%
of the rows in a different table and the complete would have been an better
option. (Don't quote me on the percentages, just trying to make a point) I
remember seeing a reference to this issue that it was addressed at ioug
conference years ago, but I did not find anything there. So again the
question: What factor(s) should be considered to determine which process(fast
or complete) will provide for a faster refresh for higher than normal updates
to a master table? Thanks
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Author: Tracy Rahmlow
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