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MongoDB manual says by default chunk size is 255K.

Its current Java API says its 256K.

Which one is right or both?

Dev
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1 Answers1

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It used to be 256K, and has since been changed to 255K. The extra 1K is for meta-data overhead, while still being within 256K.

This has been fixed in 2.12.0 and 3.0.0: https://jira.mongodb.org/browse/JAVA-1154

This appears to be an error in the documentation. The JIRA ticket references git commits that fix it in the code. Feel free to open up a documentation-related ticket within the MongoDB Java Driver Project JIRA.

zamnuts
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