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Posted to issues@karaf.apache.org by "Fabian Lange (Jira)" <ji...@apache.org> on 2019/10/15 14:59:00 UTC

[jira] [Created] (KARAF-6454) FeaturesServiceImpl downloadThreads does not improve throughput

Fabian Lange created KARAF-6454:
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             Summary: FeaturesServiceImpl downloadThreads does not improve throughput
                 Key: KARAF-6454
                 URL: https://issues.apache.org/jira/browse/KARAF-6454
             Project: Karaf
          Issue Type: Bug
            Reporter: Fabian Lange
         Attachments: Screenshot 2019-10-15 at 16.53.00.png

I am looking into a slow Karaf startup and I stumbled onto this problem

FeaturesServiceImpl does allow for parallelism thanks to the downloadThreads configuration
It does respect this value and createDownloadManager() will use it to size the threadpool.

However adding a large amount of features at the same time results in one by one downloads across these threads.
I am currently looking for any pointers where the features install could be sequenced.
Attached is a JProfiler screenshot illustrating this problem.



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