Optimze MySQL - specific server settings

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I'm not sure I understand your question. Page Parse times have very little to do with MySql performance.
I agree however that a 13sec page load time is not very good.
Have you checked your site at websiteoptimization.com?

http://www.websiteoptimization.com/services/analyze/

If not, it's worth a visit

What controls page parse times?

Thanks