mongodb index intersection
When you use explain(true) you can see that the optimizer considers using index intersection and chooses not to: "cursor" : "BtreeCursor Age" ...,There are some details about the index selection in the SERVER-3071 JIRA issue but I cannot say if all is still relevant for 3.0. Anyway: MongoDB 3.0.2 seems ...
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 mongodb index intersection 相關參考資料
Indexes — MongoDB Manual
Default _id Index; Create an Index; Index Types; Index Properties; Index Use; Indexes and Collation; Covered Queries; Index Intersection; Restrictions ... https://docs.mongodb.com Why doesn't MongoDB use index intersection? - Stack Overflow
When you use explain(true) you can see that the optimizer considers using index intersection and chooses not to: "cursor" : "BtreeCursor Age" ... https://stackoverflow.com Why MongoDB doesn't use Index Intersection? - Stack Overflow
There are some details about the index selection in the SERVER-3071 JIRA issue but I cannot say if all is still relevant for 3.0. Anyway: MongoDB 3.0.2 seems ... https://stackoverflow.com MongoDB Index intersection example? - Stack Overflow
Check this jira ticket on information about index intersection: The query optimizer may select index intersection plans when the following ... https://stackoverflow.com How to check if index intersection can support a query in ...
So how can I know, when there are enough data perhaps, whether an intersection of indices would be used or not? PS: I'm using MongoDB Atlas ... https://stackoverflow.com MongoDb index intersection usage - Stack Overflow
(Before v2.6, one of MongoDB's well-known limitation is that it can use only one index per query except some special cases using $or. To improve query speed, ... https://stackoverflow.com Index Intersection — MongoDB Manual
Index Intersection. MongoDB can use the intersection of multiple indexes to fulfill queries. In general, each index intersection involves two indexes; however, MongoDB can employ multiple/nested index... https://docs.mongodb.com MongoDB: Index intersection does not eliminate the need for ...
There are a couple of reasons for this at present (I say at present, because improvements may be introduced in the future that reduce the ... https://dba.stackexchange.com Index intersection vs. compound index? - Stack Overflow
Is it possible for mongodb to use multiple index intersections per query? Index intersection is a new feature introduced in the MongoDB 2.5.5 ... https://stackoverflow.com MongoDB index intersection - Stack Overflow
Well it actually does even though it does not in this case. To really see what is happening you need to look at the "verbose" form of explain, by adding true : https://stackoverflow.com |