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| | Once your Rails app begins to see consistent traffic, slow SQL queries will likely arise, but how do you know where your app's slowing down?
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| | Five ways to run EXPLAIN on your Rails database queries.
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| | SQL queries don't start with SELECT
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| Covering indexes in PostgreSQL are an incredibly helpful feature that can help improve the performance of your application when used correctly. This article demonstrates how an application that collects time-series and geospatial data is able to use covering indexes to boost performance.