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https://issues.apache.org/jira/browse/OAK-6180?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcel Reutegger updated OAK-6180:
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Attachment: OAK-6180.patch
Attached proposed changes [^OAK-6180.patch].
> Tune cursor batch/limit size
> ----------------------------
>
> Key: OAK-6180
> URL: https://issues.apache.org/jira/browse/OAK-6180
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: mongomk
> Reporter: Marcel Reutegger
> Assignee: Marcel Reutegger
> Fix For: 1.8
>
> Attachments: OAK-6180.patch
>
>
> MongoDocumentStore uses the default batch size, which means MongoDB will
> initially get 100 documents and then as many documents as fit into 4MB.
> Depending on the document size, the number of documents may be quite high and
> the risk of running into the 60 seconds query timeout defined by Oak
> increases.
> Tuning the batch size (or using a limit) may also be helpful in optimizing
> the amount of data transferred from MongoDB to Oak. The DocumentNodeStore
> fetches child nodes in batches as well. The logic there is slightly
> different. The initial batch size is 100 and every subsequent batch doubles
> in size until it reaches 1600. Bandwidth is wasted if the MongoDB Java driver
> fetches way more than requested by Oak.
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