MongoDB Tutorial 0/120 lessons ~6 min read Lesson 69
Index Optimization
Optimizing indexes means dropping redundant ones, building covering indexes, and using partial / sparse indexes to keep them small.
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2 guided sections
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Concept-first lesson
Career prep
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Introduction
Optimizing indexes means dropping redundant ones, building covering indexes, and using partial / sparse indexes to keep them small.
Understanding the topic
- Covering index — projection matches index, zero document fetches.
- Partial index — index only docs matching a filter (smaller RAM).
- Sparse index — skips docs missing the field.
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