RE: Should you still tune queries by LIOs?

Agreed. Using runtime as the target has caused us to get to the point where simple queries were no longer acceptable because all of the other queries/DML were taking up too much runtime en masse. While lowest conceivable runtime is certainly a goal, it alone does not address important things like scalability.

My $.02,
Rich

Rich Jesse                        System/Database Administrator
rich.jesse_at_quadtechworld.com      QuadTech, Sussex, WI USA

-----Original Message-----

Sent: Tuesday, September 07, 2004 11:49 AM Subject: RE: Should you still tune queries by LIOs?

Well, here I have to disagree. You can set being well cached as the ultimate goal. That used to be the case for years and years. In the scientific literature, this methodology is known as "method C". (I assume that "C" stands for "Cary". I would really like to know why were methods named "C" and "R".) So, if your buffer cache hit ratio is over 95% and your shared pool hit ratio is over 99%, everything is peachy. User screams should be ignored or punished.

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Mladen Gogala

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