>
> Josh, there seems to be an inconsistency in your blog. You say 3.10.X is
> safe, but the graph you show with the poor performance seems to be from
> 3.13.X which as I understand it is a later kernel. Can you clarify which
> 3.X kernels are good to use and which are not?
Sorry to cut in -
So far we've found kernel 3.18 to be excellent for postgres 9.3 performance (pgbench + our own queries run much faster
thanwith the 2.6.32-504 centos 6 kernel, and we haven't encountered random stalls or slowness).
We use elrepo to get prebuilt rpms of the latest mainline stable kernel (kernel-ml).
http://elrepo.org/tiki/kernel-ml
Graeme Bell