captrunc (internal)

发布于 2015-09-14 15:05:28 | 159 次阅读 | 评论: 0 | 来源: 网络整理

captrunc¶

The captrunc command is an internal command that truncates capped collections.

参数:	collection (string) – The name of the collection to truncate. n (integer) – An integer that specifies thenumber of documents to remove from the collection inc (boolean) – Specifies whether to truncate the `n`th document.

Example

Truncate 10 older documents from the collection records:

db.runCommand({captrunc: "records" , n:10})

Truncate 100 documents and the 101st document:

db.runCommand({captrunc: "records", n:100, inc:true})

注解

captruc is an internal command that is not enabled by default. captruc must be enabled by using --setParameter enableTestCommands=1 on the mongod command line. captruc cannot be enabled during run-time.

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