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https://issues.apache.org/jira/browse/HELIX-559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15220741#comment-15220741
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Lei Xia commented on HELIX-559:
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We are still seeing this issue in our production, it took 40s - 1min to read an
resource externalview from Helix web admin, but it took only 2s to read
directly from zk. I am opening the ticket, and we need more investigation on
this.
> Helix web admin performance issues
> ----------------------------------
>
> Key: HELIX-559
> URL: https://issues.apache.org/jira/browse/HELIX-559
> Project: Apache Helix
> Issue Type: Bug
> Affects Versions: 0.6.4
> Reporter: Zhen Zhang
> Assignee: Zhen Zhang
> Fix For: 0.6.5
>
>
> Helix web admin has a couple of performance issues:
> - Use restlet default server which is slow
> Need to switch to use jetty
> - Unnecessary json deserialization/serialization
> For reading idealStates from helix web admin, we read as ZNRecord, serialize
> ZNRecord to byte arrays, and return the result. It's not necessary to do the
> der/ser which costs lots of CPU cycles. Instead, we can read the raw data as
> byte arrays and return it directly.
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