Last Updated: November 21, 2025
Focus Areas
| Focus |
|---|
Trigger background builds
|
Monitor usage with system.profile
|
Commands & Queries
db.collection.createIndex({ userId: 1 }, { background: true })
Build index
db.collection.dropIndex('idx')
Drop index
db.system.profile.find()
Review slow queries
Summary
Background builds keep MongoDB online while indexes refresh.
💡 Pro Tip:
Enable profiler to find unused indexes before deleting.