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I was wondering whether someone could provide some advice on my cloudant query below. It is now taking upwards of 20 seconds to execute against a DB of 50,000 documents - I suspect I could be getting better speed than this.

The purpose of the query is to find all of my documents with the attribute "searchCode" equalling a specific value plus a further list of specific IDs.

Both searchCode and _id are indexed - any ideas why my query would be taking so long / what I could do to speed it up?

mydb.find({selector: {"$or":[{"searchCode": searchCode},{"_id":{"$in":idList}}]}}, function (err, result) {
   if(!err){
      fulfill(result.docs);
   }
   else{
      console.error(err);
   }
});

Thanks, James

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1 回答 1

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You could try doing separate calls for the queries

  • find me documents where the searchCode = 'some value'
  • find me documents whose ids match a list of ids

The first can be achieved with a find call and a query like so:

{ selector: {"searchCode": searchCode} }

The second can be achieved by hitting the databases's _all_docs endpoint, passing in the list of ids as a keys parameter e.g.

GET /db/_all_docs?keys=["a","b","c"]

You might find that running both requests in parallel and merging the results gives you better performance.

于 2016-12-15T12:24:55.797 回答