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https://issues.apache.org/jira/browse/DRILL-336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jacques Nadeau resolved DRILL-336.
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Resolution: Fixed
merged in e80c32e
> Extend off heap memory manager to support growing vectors
> ---------------------------------------------------------
>
> Key: DRILL-336
> URL: https://issues.apache.org/jira/browse/DRILL-336
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.0.0-rc1
> Reporter: John Morris
> Labels: patch, performance
> Fix For: 1.0.0-rc1
>
>
> Add the following interfaces to the bufferl memory manager:
> ptr = alloc(size, min, max) - allocate a block with given size, but
> with a total capacity between
> min+max.
> trim(ptr) - free up extra capacity, so current size is the capacity
> Rationale: It isn't always possible to anticipate the size of a vector. When
> creating a new vector, one strategy is to over-allocate the vector and then
> trim the size once the vector is complete. These routines allow us to
> implement this strategy.
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