Database Optimization for Rails Apps(blog.nbwd.co.uk)

blog.nbwd.co.uk

http://blog.nbwd.co.uk/2007/11/20/database-optimization-for-rails-apps

The reporting application I'm working on does a date-range select against a table with ten million rows. It took over two minutes to execute. I cut it down to around two seconds without significantly changing the application. Here's how.

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