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https://issues.apache.org/jira/browse/HDFS-7158?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14150254#comment-14150254
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Haohui Mai commented on HDFS-7158:
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The main changes of the v0 patch are the following:
# Store the bytes in PB format directly in the memory instead of extracting out
at the first place.
# Optimize the usage of INodeReference.
# Miscellaneous clean ups.
I've tested the code on a 3G fsimage, the peak heap usage of WebImageViewer
reduces from 46G to 7G.
> Reduce the memory usage of WebImageViewer
> -----------------------------------------
>
> Key: HDFS-7158
> URL: https://issues.apache.org/jira/browse/HDFS-7158
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Haohui Mai
> Assignee: Haohui Mai
> Attachments: HDFS-7158.000.patch
>
>
> Currently the webimageviewer can take up as much memory as the NN uses in
> order to serve the WebHDFS requests from the client.
> This jira proposes to optimize the memory usage of webimageviewer.
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