On Wed, Dec 5, 2012 at 10:28 AM, Shaun Thomas <sthomas@xxxxxxxxxxxxxxxx> wrote: > Hey guys, > > This isn't a question, but a kind of summary over a ton of investigation > I've been doing since a recent "upgrade". Anyone else out there with > "big iron" might want to confirm this, but it seems pretty reproducible. > This seems to affect the latest 3.2 mainline and by extension, any > platform using it. My tests are restricted to Ubuntu 12.04, but it may > apply elsewhere. > > Comparing the latest official 3.2 kernel to the latest official 3.4 > kernel (both Ubuntu), there are some rather striking differences. I'll > start with some pgbench tests. Is 3.2 a significant regression from previous releases, or is 3.4 just faster? Your wording only indicates that "older kernel is slow," but your tone would suggest that you feel this is a regression, cf. being unhappy that 3.2 made its way into a LTS release (why wouldn't it? it was a relatively current kernel at the time). -- fdr -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
