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Most people do not understand the knowledge points of this article "under what circumstances the index will choose a strategy in MongoDB", so the editor summarizes the following content, detailed content, clear steps, and has a certain reference value. I hope you can get something after reading this article. Let's take a look at this "MongoDB under what circumstances the index will choose a strategy" article.

1. How does MongoDB choose the index

If we build five index in Collection, when we query, MongoDB will locate the index that can be used as a candidate index according to the filter condition of the query statement, sort sorting, etc.; then MongoDB will create a corresponding number of query plans, and execute the query plan using different threads, and finally select the index with the fastest execution However, this choice is not immutable, and it will be dynamically adjusted according to the actual implementation for some time to follow.

2. Data preparation for (let I = 0 position I)

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