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b6dc721e33
$ gg -e 'numbers(toUInt64' -e 'numbers_mt(toUInt64' | cut -d: -f1 | sort -u | xargs sed -i -E 's#numbers(_mt|)\(toUInt64\(([^()]*)\)\)#numbers\1(\2)#'
50 lines
2.8 KiB
SQL
50 lines
2.8 KiB
SQL
-- each uniqCombined state should not use > sizeof(HLL) in memory,
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-- sizeof(HLL) is (2^K * 6 / 8)
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-- hence max_memory_usage for 100 rows = (96<<10)*100 = 9830400
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-- HashTable for UInt32 (used until (1<<13) elements), hence 8192 elements
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SELECT 'UInt32';
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SET max_memory_usage = 4000000;
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SELECT sum(u) FROM (SELECT intDiv(number, 8192) AS k, uniqCombined(number % 8192) u FROM numbers(8192 * 100) GROUP BY k); -- { serverError 241 }
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SET max_memory_usage = 9830400;
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SELECT sum(u) FROM (SELECT intDiv(number, 8192) AS k, uniqCombined(number % 8192) u FROM numbers(8192 * 100) GROUP BY k);
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-- HashTable for UInt64 (used until (1<<12) elements), hence 4096 elements
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SELECT 'UInt64';
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SET max_memory_usage = 4000000;
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SELECT sum(u) FROM (SELECT intDiv(number, 4096) AS k, uniqCombined(reinterpretAsString(number % 4096)) u FROM numbers(4096 * 100) GROUP BY k); -- { serverError 241 }
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SET max_memory_usage = 9830400;
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SELECT sum(u) FROM (SELECT intDiv(number, 4096) AS k, uniqCombined(reinterpretAsString(number % 4096)) u FROM numbers(4096 * 100) GROUP BY k);
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SELECT 'K=16';
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-- HashTable for UInt32 (used until (1<<12) elements), hence 4096 elements
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SELECT 'UInt32';
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SET max_memory_usage = 2000000;
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SELECT sum(u) FROM (SELECT intDiv(number, 4096) AS k, uniqCombined(16)(number % 4096) u FROM numbers(4096 * 100) GROUP BY k); -- { serverError 241 }
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SET max_memory_usage = 4915200;
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SELECT sum(u) FROM (SELECT intDiv(number, 4096) AS k, uniqCombined(16)(number % 4096) u FROM numbers(4096 * 100) GROUP BY k);
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-- HashTable for UInt64 (used until (1<<11) elements), hence 2048 elements
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SELECT 'UInt64';
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SET max_memory_usage = 2000000;
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SELECT sum(u) FROM (SELECT intDiv(number, 2048) AS k, uniqCombined(16)(reinterpretAsString(number % 2048)) u FROM numbers(2048 * 100) GROUP BY k); -- { serverError 241 }
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SET max_memory_usage = 4915200;
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SELECT sum(u) FROM (SELECT intDiv(number, 2048) AS k, uniqCombined(16)(reinterpretAsString(number % 2048)) u FROM numbers(2048 * 100) GROUP BY k);
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SELECT 'K=18';
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-- HashTable for UInt32 (used until (1<<14) elements), hence 16384 elements
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SELECT 'UInt32';
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SET max_memory_usage = 8000000;
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SELECT sum(u) FROM (SELECT intDiv(number, 16384) AS k, uniqCombined(18)(number % 16384) u FROM numbers(16384 * 100) GROUP BY k); -- { serverError 241 }
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SET max_memory_usage = 19660800;
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SELECT sum(u) FROM (SELECT intDiv(number, 16384) AS k, uniqCombined(18)(number % 16384) u FROM numbers(16384 * 100) GROUP BY k);
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-- HashTable for UInt64 (used until (1<<13) elements), hence 8192 elements
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SELECT 'UInt64';
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SET max_memory_usage = 8000000;
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SELECT sum(u) FROM (SELECT intDiv(number, 8192) AS k, uniqCombined(18)(reinterpretAsString(number % 8192)) u FROM numbers(8192 * 100) GROUP BY k); -- { serverError 241 }
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SET max_memory_usage = 19660800;
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SELECT sum(u) FROM (SELECT intDiv(number, 8192) AS k, uniqCombined(18)(reinterpretAsString(number % 8192)) u FROM numbers(8192 * 100) GROUP BY k);
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