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Index Seek on Non Clustered Index cost is very high (92%) how to reduce this ?


Index Seek on Non Clustered Index cost is very high (92%) how to reduce this ?

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kbhanu15
kbhanu15
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Hi ALl,

Please give your suggestions to resolve this problem.

Index Seek on Non Clustered Index cost is very high (92%) how to reduce this ?
GilaMonster
GilaMonster
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No way to answer with that limited information. Please at least post the execution plan.

First though, is that a problem? The costs have to add to 100% across the plan, so is that seek problematic? Is the query even problematic?


Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


MadAdmin
MadAdmin
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Add an unnecessary sort.
That should make the index seek use proportionately less cost of the entire query.
But, why would you want to?

Catch-all queries done right
Gail Shaw's Performance Blog
Jeff Moden
Jeff Moden
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kbhanu15 (7/14/2014)
Hi ALl,

Please give your suggestions to resolve this problem.

Index Seek on Non Clustered Index cost is very high (92%) how to reduce this ?


I've run into this in the past. Like Gail says, not enough information to call out a fix but, if it were me, I'd check the properties of the Index Seek in the execution plan and see how many times it's executing. If it's doing 1 seek per row instead of a single seek and a range scan, that could be one of the problems.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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