MongoDB Performance Optimization: Essential Performance Tips

Create Indexes for Query Optimization

Given a collection of blog posts, create indexes to optimize queries filtering by author and tags.

Expected output: Indexes that improve query speed for author and tags filters.

Hint: Consider compound and multikey indexes.

Design a Schema for an E-commerce Application

Design a MongoDB schema for products and reviews, deciding when to embed or reference data.

Expected output: A schema design balancing embedding and referencing for performance.

Hint: Think about access patterns and document size limits.

Indexing improves query performance by allowing MongoDB to quickly locate data without scanning the entire collection.

Embed data when related data is accessed together and has a one-to-few relationship; use references for many-to-many relationships or when embedded data can grow large.

Use the explain() method to view the query execution plan and identify if indexes are being used efficiently.