| From: | "Graeme B(dot) Bell" <grb(at)skogoglandskap(dot)no> |
|---|---|
| To: | "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Some performance testing? |
| Date: | 2015-04-09 09:04:08 |
| Message-ID: | C855EB58-773C-48C4-B30F-64CF2481E69E@skogoglandskap.no |
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| Lists: | pgsql-performance |
>
> 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 than with 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
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