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Re: [PROGRAMMERING] [SQL] Betinget INSERT?



Den Thu, 26 Mar 2009 17:18:02 +0100 skrev Michael Rasmussen:
> Merge blev tilføjet 9i, men der er dog store performance problemer med
> kommandoen, da hver iteration kræver 2 context switche, og den største
> indvirkning på performance kommer ved et context switch.

Kan du uddybe dette, eller link'e til mere info? Jeg tænker, at context 
switches trods alt stadig markant overskygges af I/O-forsinkelser?

-- 
Regards,
Troels Arvin <sslug@sslug>
http://troels.arvin.dk/


 
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