[rails] active_record keeps track of the :cached key if it's available #57
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ufoot
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Jan 16, 2017
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What it does
Keeps track of the
:cachedattribute in theactive_recordinstrumentation payload. This is a best effort support for the moment, since this change has been deployed in the Rails master but it has not been released.Having
rails.db.cachedmeta is useful to explain users why some SQL queries has 0ns of duration.