I have a search query something like this: ((q1 AND q2) OR (q3 AND q4)). I can replicate it using must, should in Elasticsearch's search or scroll API query. But I want to know how many such queries can be combined in single query in Elasticsearch. I have around 1000 OR queries, will it have negative impact on performance if I pass 1000 queries in should clause? And is there any limit on number of queries? I know there is limit on clause of query which can be max_clause_count. Is there similar limit on number of queries?
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Rohanil
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There is no hardcoded limitation.
This will depend on your hardware and data, try it and ask question if you got any error!
To improve:
- Use
filter - Use
constant_scoreto "disable" tf/idf calcul (https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-constant-score-query.html)
Just by curiosity, why do you need 1000 queries?
Thomas Decaux
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Initially I had one query which used to return huge amount of documents but I don't need all of them always. Most of the times, I need only few of them. The initial query used to take a lot of time because of no. of docs and serialisation/deserialisation time. so I thought to make a combined query to return optimum amount of documents. Eventually it became a combined query of so many queries. Its not always 1000 queries, it is a worst scenario. Sometimes just 10 queries. I just want to check if there is any limit over no. of queries so I can change to old solution or something else. – Rohanil Oct 12 '17 at 14:34
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Maybe you should describe your use case, give a data sample and a query, so we can help you to improve it. – Thomas Decaux Oct 12 '17 at 16:00