How do you interpret the `explain()` output to determine index effectiveness?

Mar 17, 2025 ... Indexes are special data structures that store information about the documents in a way that makes it easier for MongoDB to quickly locate the right data. Oct 10, 2024 ... A clustered collection in MongoDB organizes documents based on a specified field and stores data in the same order as the index on that field. Jun 8, 2020 ... By default, MongoDB builds indexes in the foreground, which prevents all read and write operations to the database while the index builds. This ... Dec 15, 2015 ... 1 Answer 1 ... The first you need to do is calculate how many documents the index will delete if you change the 60 days into 30. That is a simple ... Nov 11, 2024 ... To use MikroORM with mongo database, do not forget to install @mikro-orm/mongodb ... You can use @Index() and @Unique() as described in Defining ... MongoDB provides text indexes to support text search of string content. Text indexes can include any field whose value is a string or an array of string ... This community-maintained MongoDB extension supports the MongoDB change ... Drop an index for a collection by keys.

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what is index in mongodb

• How does the query planner choose an index? What are the different stages in an `explain()` output related to indexing?
• What are the key metrics to monitor to detect indexing-related performance problems? How can you use MongoDB Atlas to monitor and optimize your indexes?
• How do you use aggregation pipeline stages like `$indexStats` to analyze index usage?
• How does online index rebuilding work in MongoDB? What are the considerations and potential impact of online index rebuilding?
• Can you index arrays in MongoDB?
• What is the working set and how does it relate to indexing? How does the amount of RAM available affect MongoDB's ability to use indexes effectively?
• What are the best resources for learning more about MongoDB indexing? Can you use regular expressions in queries with indexes?
• How do you optimize indexes for specific aggregation pipeline patterns? What are the best practices for indexing in a globally distributed MongoDB Atlas cluster?
• What are the considerations for indexing large volumes of geospatial data?
• How do you create and manage custom analyzers for text indexes?