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Capped Collection In Mongodb

In this article, we will discuss the capped collection in MongoDB.

Purpose

A capped collection in MongoDB is a fixed-size collection that overwrites its oldest entries when it reaches its maximum size.

db.createCollection([collection_name], { capped: true, size: [size], max:[max documents] })

To create a capped collection, use the following query: -

db.createCollection("myCappedCollection", { capped: true, size: 1024, max:2 })

Insert 2 values in the capped collection.

Insert one more value in the collection.

In the above collection, the first value is overwritten with the new value.

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