mongodb count performance
Avoid using the db.collection.count() method without a query predicate since .... that subsequent calls of the same count operation will have better performance. , I want to know the number of podcasts that start with the letter A: Counting large collections is unfortunately slow, but sometimes necessary…
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 mongodb count performance 相關參考資料
Counting & Not Counting with MongoDB - Compose Articles
https://www.compose.com db.collection.count() — MongoDB Manual
Avoid using the db.collection.count() method without a query predicate since .... that subsequent calls of the same count operation will have better performance. https://docs.mongodb.com Faster counts in large MongoDB collections – Eric Lu – Medium
I want to know the number of podcasts that start with the letter A: Counting large collections is unfortunately slow, but sometimes necessary… https://medium.com How to speed up MongoDB count() Queries? - Stack Overflow
The indexes don't seem to make much sense this way. Not-equals-queries like $gte and $lte should be at the end - not only in the query, but also in the index. https://stackoverflow.com Mongo count really slow when there are millions of records - Stack ...
Count queries, indexed or otherwise, are slow due to the fact that MongoDB still has ... that should (and does) improve performance of counts on indexed fields. https://stackoverflow.com mongodb 'count' with query is very slow - Stack Overflow
The reason this count query is not particularly fast is because it has to scan 451466 entries in the index to count up entries. In other words, your ... https://stackoverflow.com MongoDB 'count()' is very slow. How do we refinework around with ...
By using atomic $inc operation and not use count(}) at all. But mongodb guys working hard on mongodb, so, count(}) improvements they are planning in ... https://stackoverflow.com MongoDB count is very slow - Stack Overflow
The problem is with planSummary: IXSCAN . When count uses IXSCAN, it also does FETCH. Something like this: "planSummary" : "IXSCAN ... https://stackoverflow.com Mongodb count with queries have poor performance - Stack Overflow
While this might not be the final answer, let's get started and evolve this further: Your indexes should always fit into RAM, otherwise you will get ... https://stackoverflow.com Performance of count for mongodb - Stack Overflow
2 Answers. A count() without a query predicate is a fast/estimated count read from the collection statistics, so should return in constant time regardless of the total number of documents. This is th... https://stackoverflow.com |