os cache vs. db cache

Hello everyone,

Over the years, I've read differing opinions on balancing the os cache and the database cache. Seems like I remember there were some advocates for minimizing the os cache and maximizing the database cache to allow Oracle to better determine which blocks should truly be cached and avoid necessary blocks being cached because they were in proximity to hot data. I also have heard opposite opinions.

I'm specifically focused on performance for a data warehouse. Has anyone tested performance with a minimized OS cache and a maximized database cache? If so, what were the results? Does anyone have a really good paper or book on the topic? I'm trying to collect some information before I start discussions with the platforms guys.

tia ... Robyn

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