Hello Lars Volker, Tim Armstrong, Dan Hecht,

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/9282

to look at the new patch set (#3).

Change subject: IMPALA-6116: Bound memory usage of DataStreamSevice's service 
queue
......................................................................

IMPALA-6116: Bound memory usage of DataStreamSevice's service queue

The fix for IMPALA-6193 added a memory tracker for the memory consumed
by the payloads in the service queue of DataStreamService. This change
extends it by introducing a bound on the memory usage for that service
queue. In addition, it deprecates FLAGS_datastream_service_queue_depth
and replaces it with FLAGS_datastream_service_queue_mem_limit. These flags
only take effect when KRPC is in use and KRPC was never enabled in any
previous releases so it seems safe to do this flag replacement. The new
flag FLAGS_datastream_service_queue_mem_limit directly dictates the amount
of memory which can be consumed by the service queue of DataStreamService.
This allows a more direct control over the memory usage of the queue instead
of inferring via the number of entries in the queue. The default value of
this flag is left at 0, in which case it will be set to 20% of process
memory limit.

Testing done: exhaustive debug builds. Updated data-stream-test to
exercise the case in which the payload is larger than the limit.

Change-Id: Idea4262dfb0e0aa8d58ff6ea6a8aaaa248e880b9
---
M be/src/rpc/impala-service-pool.cc
M be/src/rpc/impala-service-pool.h
M be/src/rpc/rpc-mgr-test-base.h
M be/src/rpc/rpc-mgr-test.cc
M be/src/rpc/rpc-mgr.cc
M be/src/rpc/rpc-mgr.h
M be/src/runtime/data-stream-test.cc
M be/src/runtime/exec-env.cc
M be/src/runtime/exec-env.h
M be/src/runtime/krpc-data-stream-mgr.cc
M be/src/runtime/krpc-data-stream-mgr.h
M be/src/runtime/mem-tracker.h
M be/src/service/data-stream-service.cc
M be/src/service/data-stream-service.h
M tests/custom_cluster/test_krpc_mem_usage.py
15 files changed, 283 insertions(+), 164 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/82/9282/3
--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Idea4262dfb0e0aa8d58ff6ea6a8aaaa248e880b9
Gerrit-Change-Number: 9282
Gerrit-PatchSet: 3
Gerrit-Owner: Michael Ho <k...@cloudera.com>
Gerrit-Reviewer: Dan Hecht <dhe...@cloudera.com>
Gerrit-Reviewer: Lars Volker <l...@cloudera.com>
Gerrit-Reviewer: Michael Ho <k...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>

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