Ashutosh Chauhan commented on PIG-1037:

I am kinda late on this, but I would appreciate if someone can provide brief 
description of how this patch improves the memory layout and alleviates the 
spill problem. I took a quick look at the patch. 
According to my understanding, previously when memory is about to get exhausted 
Pig will start writing to the disk one tuple at a time. With this new patch, 
once the memory limit is hit whole bag is spilled to disk, at that point 
in-memory bag contains no tuples. If in-memory bag fills again, all of its 
content are spilled to disk in entirety again and so on.. So this patch ensures 
that we are not spilling one tuple at a time, but a full bag a time. Is this 
correct or am I missing something ?

> better memory layout and spill for sorted and distinct bags
> -----------------------------------------------------------
>                 Key: PIG-1037
>                 URL: https://issues.apache.org/jira/browse/PIG-1037
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Olga Natkovich
>            Assignee: Ying He
>             Fix For: 0.6.0
>         Attachments: PIG-1037.patch, PIG-1037.patch2, PIG-1037.patch3

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