Internal Jenkins has submitted this change and it was merged.

Change subject: IMPALA-3201: in-memory buffer pool implementation
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IMPALA-3201: in-memory buffer pool implementation

This patch implements basic in-memory buffer management, with
reservations managed by ReservationTrackers.

Locks are fine-grained so that the buffer pool can scale to many
concurrent queries.

Includes basic tests for buffer pool setup, allocation and reservations.

Change-Id: I4bda61c31cc02d26bc83c3d458c835b0984b86a0
Reviewed-on: http://gerrit.cloudera.org:8080/4070
Reviewed-by: Tim Armstrong <tarmstr...@cloudera.com>
Tested-by: Internal Jenkins
---
M be/src/bufferpool/CMakeLists.txt
A be/src/bufferpool/buffer-allocator.cc
A be/src/bufferpool/buffer-allocator.h
M be/src/bufferpool/buffer-pool-test.cc
M be/src/bufferpool/buffer-pool.cc
M be/src/bufferpool/buffer-pool.h
M be/src/util/internal-queue.h
M common/thrift/generate_error_codes.py
8 files changed, 933 insertions(+), 69 deletions(-)

Approvals:
  Internal Jenkins: Verified
  Tim Armstrong: Looks good to me, approved



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Gerrit-MessageType: merged
Gerrit-Change-Id: I4bda61c31cc02d26bc83c3d458c835b0984b86a0
Gerrit-PatchSet: 11
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: Dan Hecht <dhe...@cloudera.com>
Gerrit-Reviewer: Internal Jenkins
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>

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