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 Originally Posted by gandolf989
I thought tuning by ratios was for the most part debunked. 
I'm not looking at ratios but at wait events.
Query shows which wait events are affecting the most your system so you can drill down on them.
As per posted "db file scatered/sequential read" I don't know the answer to your question... and I don't know it for two reasons. 1) I really don't care about ratios but individual wait events and, 2) correct ratio would depend on specific application. May be that ratio is fantastic, who knows? 
Pablo (Paul) Berzukov
Author of Understanding Database Administration available at amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
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