Execution Plan reuse

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Execution Plan reuse

Steve Jones - SSC Editor

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December 16, 2014 at 11:23 pm

#74505

Comments posted to this topic are about the item Execution Plan reuse

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Eirikur Eiriksson SSC Guru Points: 182912 More actions · Answer 1

Nice "first coffee" question, thanks.

😎

BTW: another good read on the subject (MSDN) Caching Mechanisms

rhythmk SSCertifiable Points: 7271 More actions · Answer 2

Thanks for question Steve.

Got it wrong 🙁 but refresh all once again 🙂

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Ed Wagner SSC Guru Points: 287026 More actions · Answer 3

A good question that taught me something, so thanks. I see the answers are all over the map on this one.

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Koen Verbeeck SSC Guru Points: 259115 More actions · Answer 4

Great question, definately learned something.

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cgumprich Ten Centuries Points: 1056 More actions · Answer 5

Do I get partial credit for picking two out of three? How about picking the third, then changing my mind and deselecting it in favor of the wrong answer? 😛

Great question.

david.gugg SSCertifiable Points: 6098 More actions · Answer 6

Dropping any index on the table, whether it is used by the query plan or not

This should probably say "Dropping an index on the table that is not used by the query plan." If the index is used by the query, won't it necessarily cause a recompile? 70% choose this option.

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stephen.long.1 SSCrazy Points: 2582 More actions · Answer 7

Great question, Steve. Two out of three isn't too bad, is it? :hehe: Thanks, I learned something.

ssimmons 2102 SSCommitted Points: 1634 More actions · Answer 8

I think it should have been worth more that 1 point. This was a tough one, I must have checked and unchecked Dropping the index box 5 times, before deciding that wasn't one of them.

Dana Medley SSCertifiable Points: 6764 More actions · Answer 9

stephen.long.1 (12/17/2014)
Great question, Steve. Two out of three isn't too bad, is it? :hehe: Thanks, I learned something.

+1 Thanks for the question.

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Steve Jones - SSC Editor SSC Guru Points: 736270 More actions · Answer 10

cgumprich (12/17/2014)
Do I get partial credit for picking two out of three? How about picking the third, then changing my mind and deselecting it in favor of the wrong answer? 😛
Great question.

Sorry, though that's a good idea. Partial credit on these multi-choice answer. Hmmmm.

nelsonj-902869 SSCarpal Tunnel Points: 4666 More actions · Answer 11

Unfair , unfair......

After reviewing the documentation in BOL, my third choice was Large numbers of changes to keys..., which is one of the reasons for a recompile. One would think partial credit could be awarded for selecting a valid answer that wasn't as important as the three acceptable answers. Rats......

Thomas Abraham SSChampion Points: 10761 More actions · Answer 12

Nice question. And I'm only partially motivated in my praise by having got it correct.

Had to think about it for a while - almost went with the dropping an index answer, but noted the "whether it is used or NOT" part and decided against it.

Thanks Steve!

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SQLRNNR SSC Guru Points: 281334 More actions · Answer 13

nelsonj-902869 (12/17/2014)
Unfair , unfair......
After reviewing the documentation in BOL, my third choice was Large numbers of changes to keys..., which is one of the reasons for a recompile. One would think partial credit could be awarded for selecting a valid answer that wasn't as important as the three acceptable answers. Rats......

If you selected the option

"A large number of changes to keys caused by insert or delete operations"

Then it was one of the correct options for this question. One of your other selections was not valid for this question.

Jason...AKA CirqueDeSQLeil
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RK Mandava SSCarpal Tunnel Points: 4153 More actions · Answer 14

RK Mandava

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December 17, 2014 at 11:30 am

#1765252

Nice question.