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on March 22, 2016
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Postgresql 9.6: Support parallel aggregation
The article claims a near linear speedup for a very large query. On a 64 core machine, the query takes:
1375s with 0 workers
131s with 10 workers
56s with 30 workers
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1375s with 0 workers
131s with 10 workers
56s with 30 workers