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https://issues.apache.org/jira/browse/HBASE-5945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13552350#comment-13552350
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stack commented on HBASE-5945:
------------------------------
bq. ....are you saying that we preserve most of the current RPC header/body
structure, and commit the patch here with a focus on removing buffer copies?
No. If we do that, we have to put rpc back together twice because it will have
changed radically twice. We will also reduce buffer copies that we may not be
of use in the final rpc incarnation. I was thinking we do the spec first over
in 7533. This issue would be about saving buffer copies after we put rpc back
together after 7533.
> Reduce buffer copies in IPC server response path
> ------------------------------------------------
>
> Key: HBASE-5945
> URL: https://issues.apache.org/jira/browse/HBASE-5945
> Project: HBase
> Issue Type: Improvement
> Components: IPC/RPC
> Affects Versions: 0.96.0
> Reporter: Todd Lipcon
> Assignee: stack
> Priority: Blocker
> Fix For: 0.96.0
>
> Attachments: 5945-in-progress.2.1.patch, 5945-in-progress.2.patch,
> 5945-in-progress.patch, buffer-copies.txt, even-fewer-copies.txt,
> hbase-5495.txt
>
>
> The new PB code is sloppy with buffers and makes several needless copies.
> This increases GC time a lot. A few simple changes can cut this back down.
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