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I am using SQL Server Execution plan for analysing the performance of a stored procedure. I have two results with and without the index. In both these results the estimated cost shows the same value (.0032831) but the cost % differs from one another as first, without index is 7% and with Index is 14%.
What does it really means?
Please help me with this.,
Thanks in advance.
It means that the plan without the index is costed as being doubly expensive.
For the first one the total plan cost is
.0032831/0.07 = 0.0469, for the second one the total plan cost is.0032831/0.14which is clearly going to be half that number.