when to index on multiple keys in mongodb

Posted by Evan on Stack Overflow See other posts from Stack Overflow or by Evan
Published on 2010-06-10T17:26:57Z Indexed on 2010/06/10 17:32 UTC
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mongodb

say I have an Item document with :price and :qty fields. I sometimes want to find all documents matching a given :price AND :qty, and at other times it will be either :price on its own or :qty on its own.

I have already indexed the :price and :qty keys, but do I also need to create a compound index on both together or are the single key indexes enough?

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when to index on multiple keys in mongodb

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