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Posted to oak-issues@jackrabbit.apache.org by "Julian Reschke (Jira)" <ji...@apache.org> on 2023/01/19 12:50:00 UTC

[jira] [Updated] (OAK-9754) Increase default dump threshold for multithreaded download

     [ https://issues.apache.org/jira/browse/OAK-9754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Julian Reschke updated OAK-9754:
--------------------------------
    Fix Version/s:     (was: 1.48.0)

> Increase default dump threshold for multithreaded download
> ----------------------------------------------------------
>
>                 Key: OAK-9754
>                 URL: https://issues.apache.org/jira/browse/OAK-9754
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: indexing
>            Reporter: Yu-An Lin
>            Priority: Major
>
> Looking at the detailed log output of indexing job using Oak with Multi-Threaded Download Strategy, lots of small files are being created because we have a low dump threshold of 1MB per file. [https://github.com/apache/jackrabbit-oak/blob/trunk/oak-run-commons/src/main/java/org/apache/jackrabbit/oak/index/indexer/document/flatfile/FlatFileNodeStoreBuilder.java#L91] 
> We should increase the threshold if possible to even larger to 16 MB instead, that way we have 16 MB, with 8 threads that is 128 MB. This would (hopefully) reduce the number of files from 22'972 to 1'435, which is more more reasonable. Also, I don't think it would bring any risk of out-of-memory.



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