John Morris created DRILL-336:
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Summary: 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-milestone-2
Reporter: John Morris
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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