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Perf: Targeted benchmarks with a heavily spilling query on a machine with PCLMULQDQ support show < 5% of CPU time spent in encryption and decryption. PCLMULQDQ was introduced in AMD Bulldozer (c. 2011) and Intel Westmere (c. 2010). Testing: Ran core tests with the change. Updated the custom cluster test to exercise the non-default configuration. Change-Id: Iee4be2a95d689f66c3663d99e4df0fb3968893a9 Reviewed-on: http://gerrit.cloudera.org:8080/10345 Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com> Tested-by: Tim Armstrong <tarmstrong@cloudera.com>
17 lines
406 B
Plaintext
17 lines
406 B
Plaintext
====
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---- QUERY
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# A basic spilling query to exercise spill-to-disk end-to-end.
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set buffer_pool_limit=90m;
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set default_spillable_buffer_size=64k;
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select count(*)
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from (select distinct o_orderdate, o_custkey, o_comment
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from tpch_parquet.orders) v;
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---- RESULTS
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1500000
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---- TYPES
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BIGINT
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---- RUNTIME_PROFILE
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# Verify that spilling was activated.
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row_regex: .*SpilledPartitions: .* \([1-9][0-9]*\)
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====
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