Answer
A capped collection is a fixed-size collection where MongoDB overwrites old documents when full. It maintains insertion order and supports high-speed writes, useful for logs and metrics.
Quick Answer
Capped collections have a fixed maximum size (in bytes) and optionally a max document count. When full, oldest documents are automatically overwritten by new ones (circular buffer). No deletes needed. Use for: logs, event streams, caches where only recent data matters. Insert order is maintained. Downside: can't delete individual documents, limited update operations.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ