Which plan is fast
hi,
i m using oracle 10g , i want to know which plan would do fast search.
i have zone wise data ,around 30 zones and would have data in terabytes.
so should i create partition table according to zone .
or
should i create 35 zone table .
which plan would provide me fast searching result or is there some other way ?
regards
Girish Sharma wrote:
So, is it a documentation bug, link posted by sb; which is saying :
The optimizer compares the costs of the plans and chooses the one with the lowest cost. ?It is not saying that the plan with the lowest cost is the fastest one, does it ? So, no Oracle doc bug, optimizer is really choosing the plan with lowest cost but that does not means this will be the fastest way.
The cost must be defined what we are talking about, it is a set of criteria, not only the time.
Between your home and your office, there is a straight road which represent the lowest cost in term of fuel and distance. Unfortunately, there is often traffic jump over there, so it could be faster to take a an other way, but need several kilometers more (you'll spent more money in fuel, and distance is also more). Whether the first has the lowest cost - and it would be the first advise based on cost (based on the cost definition we give), the second way will be the fastest way to reach your home from office - this would be the first advise based on experience (and it is also depend on the time you leave the office).
Nicolas.
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