What are the best practices for indexing in MongoDB?

What are the best practices for indexing in MongoDB?

When indexing in MongoDB, consider the following best practices: 1. Use compound indexes for queries that filter on multiple fields. 2. Index fields that are frequently queried or sorted. 3. Avoid over-indexing, as it can slow down write operations. 4. Regularly analyze and optimize your indexes based on query patterns.

How do I decide which fields to index?

Decide which fields to index by analyzing your query patterns. Look for fields that are frequently used in filters, sorts, or joins. Use the MongoDB profiler to identify slow queries and consider indexing those fields.

What is the impact of indexing on write performance?

Indexing can significantly impact write performance because every time a document is inserted, updated, or deleted, the indexes must also be updated. Therefore, it's essential to strike a balance between read and write performance by indexing only the necessary fields.

Can you explain compound indexes?

Compound indexes are indexes that include multiple fields. They are useful for queries that filter on multiple fields, allowing MongoDB to use a single index to satisfy the query, which can improve performance.