Answer
TTL indexes automatically delete documents after a specified time, useful for sessions, logs, and temporary data.
Quick Answer
TTL (Time To Live) indexes automatically delete documents after a specified number of seconds. Created with expireAfterSeconds: db.sessions.createIndex({createdAt: 1}, {expireAfterSeconds: 3600}) deletes documents after 1 hour. MongoDB runs a background cleanup process every 60 seconds. Use for: sessions, cache entries, temporary data, audit logs with retention policies.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ