sp_control_plan_guide & sp_create_plan_guide... what is this and how to using these procedure
After few time reading SQL2005 BOL I found this new system sp ( sp_control_plan_guide & sp_create_plan_guide) it seems to me we can force the user query to use this plan but I'm not sure how good and effective it is, can someone tell me when should I use and plan for this one and on which circumtances this sp very useful to be use?
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Oh..
I get what I mean.. basically u were says sometimes the statistics is out of date the sql misght use wrong query plan thus skow down the system..so by creating plan, we'll force sql to use the plan instead of letting sql deciding which plan that should be use when the query extracting data...
am I rite??
I get what I mean.. basically u were says sometimes the statistics is out of date the sql misght use wrong query plan thus skow down the system..so by creating plan, we'll force sql to use the plan instead of letting sql deciding which plan that should be use when the query extracting data...
am I rite??
yes that's right. sometimes even with the right statistics, there are always exceptional cases where you can do better than a machine
ASKER
take a look at this articles http://www.sql-server-performance.com/articles/per/using_plan_guides_p1.aspx
what I thought is if the query from the application run badly, we can force the application to use the query in plan guide with a similarity...
But after my readings from the link above.. i dont see the diff between the query code and plan code.. that is why seeking more info in EE