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https://issues.apache.org/jira/browse/PIG-3325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13688911#comment-13688911
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Dmitriy V. Ryaboy commented on PIG-3325:
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[~mwagner] I was loading complex thrift structures that had bags in them. With
old code (all bags register with SMM) this led to tons of weak references that
needed to be cleaned out by the SMM; new code fixed that, but apparently
created this other problem (which in practice on our workloads is not
significant.. but your workloads may be different). Looking forward to Rohini's
patch.
> Adding a tuple to a bag is slow
> -------------------------------
>
> Key: PIG-3325
> URL: https://issues.apache.org/jira/browse/PIG-3325
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.11, 0.11.1, 0.11.2
> Reporter: Mark Wagner
> Assignee: Mark Wagner
> Priority: Critical
> Attachments: PIG-3325.demo.patch, PIG-3325.optimize.1.patch
>
>
> The time it takes to add a tuple to a bag has increased significantly,
> causing some jobs to take about 50x longer compared to 0.10.1. I've tracked
> this down to PIG-2923, which has made adding a tuple heavier weight (it now
> includes some memory estimation).
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