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https://issues.apache.org/jira/browse/TEZ-3673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15993720#comment-15993720
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Siddharth Seth commented on TEZ-3673:
-------------------------------------
Looked. +1, after one small fix.
The last buffer, in case it ends up being > 50% - can we limit it to the
remaining capacity, instead of using minBufferSize. So the lsat buffer may be
smaller than the rest, but will at least be >50% of configured size, and we
don't go above max configured memory.
> Allocate smaller buffers in UnorderedPartitionedKVWriter
> --------------------------------------------------------
>
> Key: TEZ-3673
> URL: https://issues.apache.org/jira/browse/TEZ-3673
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Harish Jaiprakash
> Assignee: Harish Jaiprakash
> Attachments: TEZ-3673.01.patch, TEZ-3673.02.patch, TEZ-3673.03.patch,
> TEZ-3673.04.patch
>
>
> UnorderedPartitionedKVWriter allocates in bigger chunks. It may or may not
> get filled up. In PipelinedSorter, we start off with 32MB chunks. But
> UnorderedPartitionedKVWriter can be worse as it allocates bigger blocks. Need
> to revisit this allocation.
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