Impala Public Jenkins has submitted this change and it was merged.

Change subject: IMPALA-5778: clarify --read_size option.
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IMPALA-5778: clarify --read_size option.

Remove BTS_BLOCK_OVERFLOW error code, which is no longer used and
referenced --read_size.

Improve the flag description. The output is now:

    -read_size ((Advanced) The preferred I/O request size in bytes to issue to
      HDFS or the local filesystem. Increasing the read size will increase
      memory requirements. Decreasing the read size may decrease I/O
      throughput.) type: int32 default: 8388608

Testing:
Tested that Impala built and basic queries could run.

Change-Id: I3c20a9d55f89170b11f569c90b7f2949ddbe4211
Reviewed-on: http://gerrit.cloudera.org:8080/7623
Reviewed-by: Tim Armstrong <tarmstr...@cloudera.com>
Tested-by: Impala Public Jenkins
---
M be/src/runtime/disk-io-mgr.cc
M common/thrift/generate_error_codes.py
2 files changed, 6 insertions(+), 5 deletions(-)

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



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Gerrit-MessageType: merged
Gerrit-Change-Id: I3c20a9d55f89170b11f569c90b7f2949ddbe4211
Gerrit-PatchSet: 3
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: Balazs Jeszenszky <jes...@gmail.com>
Gerrit-Reviewer: Henry Robinson <he...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins
Gerrit-Reviewer: Matthew Jacobs <m...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>

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