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From "Kevin Sweeney (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (AURORA-930) GC performance issues with snapshot deduplication on large clusters
Date Mon, 01 Dec 2014 20:18:12 GMT

     [ https://issues.apache.org/jira/browse/AURORA-930?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kevin Sweeney updated AURORA-930:
---------------------------------
    Description: 
We observed very long GC pauses in our production cluster we believe are caused by the extra
heap pressure caused by SnapshotDeduplicatorImpl's extra deep copy of a Snapshot object.

Also, EntrySerializer fully buffers the full binary-encoded thrift Snapshot before writing
it to the replicated log - it can avoid memory pressure by streaming instead.

  was:TBD by [~kevints]


> GC performance issues with snapshot deduplication on large clusters
> -------------------------------------------------------------------
>
>                 Key: AURORA-930
>                 URL: https://issues.apache.org/jira/browse/AURORA-930
>             Project: Aurora
>          Issue Type: Story
>          Components: Scheduler
>            Reporter: Chris Lambert
>            Assignee: Kevin Sweeney
>
> We observed very long GC pauses in our production cluster we believe are caused by the
extra heap pressure caused by SnapshotDeduplicatorImpl's extra deep copy of a Snapshot object.
> Also, EntrySerializer fully buffers the full binary-encoded thrift Snapshot before writing
it to the replicated log - it can avoid memory pressure by streaming instead.



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