Re:PostgreSQL 9.6 Released
by noxin on Thursday September 29, 2016 @09:28AM
(#12605035)
They likely benchmarked it on a 32 core system. Like a dual Opteron board. If the task was single-threaded before a 32-fold improvement is reasonable.
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It's very difficult to get a 32x speedup from 32 cores as there are always parts that are inherently serial, so it's more likely they tested it on a 64 core machine or something like that.
Yes, this is thanks to Amdahl's Law.