Tim Armstrong 9e03e93320 IMPALA-5855: reserve enough memory for preaggs ...

The calculation in the planner failed to account for the behaviour of
Suballocator, which needs to obtain at least one buffer to allocate any
memory.

Testing:
Added a regression test that caused a crash before the fix.

Updated planner tests.

Was able to run local stress test binary search to completion (it
previously crashed).

Change-Id: I870fbe2f1da01c6123d3716a1198376f9a454c3b
Reviewed-on: http://gerrit.cloudera.org:8080/7871
Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com>
Tested-by: Impala Public Jenkins

2017-08-30 21:20:47 +00:00

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