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ARROW-1807: [Java] consolidate bufs to reduce heap #3121

Merged
merged 1 commit into from Dec 15, 2018
Merged

ARROW-1807: [Java] consolidate bufs to reduce heap #3121

merged 1 commit into from Dec 15, 2018

Commits on Dec 7, 2018

  1. ARROW-1807: [Java] consolidate bufs to reduce heap 

    - for fixed-len vectors, alloc a combined arrow buf for
  value and validity.
- Remove the read-write locks in AllocationMgr, they
  contribute about 150 bytes to the heap, and aren't very useful
  since there isn't much contention.
    Pindikura Ravindra committed Dec 7, 2018
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