On 2016-01-07 13:34:51 -0500, Tom Lane wrote: > It's fairly well established that the implementation of transparent > huge pages in Linux kernels from the 2.6-or-so era sucks, and you're > best off turning it off if you care about consistency of performance.
I think the feature wasn't introduced in original 2.6 kernels (3.2 or so?), but red hat had backported it to their 2.6.32 kernel. > I am not sure whether modern kernels have improved this area. I think the problem has largely been solved around 3.16. Around 4.1 I could still reproduce problems, but the regressions were only in the sub 10% range in my test workload. Andres -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
