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Posted to oak-issues@jackrabbit.apache.org by "Marcel Reutegger (JIRA)" <ji...@apache.org> on 2016/09/29 14:31:20 UTC

[jira] [Created] (OAK-4863) Reduce query batch size for deleted documents

Marcel Reutegger created OAK-4863:
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             Summary: Reduce query batch size for deleted documents
                 Key: OAK-4863
                 URL: https://issues.apache.org/jira/browse/OAK-4863
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: mongomk
            Reporter: Marcel Reutegger
            Assignee: Marcel Reutegger
            Priority: Minor
             Fix For: 1.6


MongoVersionGCSupport uses the default batchSize when it queries for possibly deleted documents. The default will initially read 100 documents and then as many as fit into a 4MB response. Depending on the document size a couple of thousand will fit in there and take time to process. It may happen that the MongoDB cursor then times out and the VersionGC fails.

An easy and safe solution is to reduce the batch size to a given number of documents.



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