| From: | "Magnus Naeslund(t)" <mag(at)fbab(dot)net> |
|---|---|
| To: | Gary Doades <gpd(at)gpdnet(dot)co(dot)uk> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: PostgreSQL and Linux 2.6 kernel. |
| Date: | 2004-04-01 20:19:14 |
| Message-ID: | 406C7942.40900@fbab.net |
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| Thread: | |
| Lists: | pgsql-performance |
Gary Doades wrote:
>
> Has anyone else done any comparative testing with the 2.6 kernel?
>
I know for a fact that certain stuff is recognized differently between
2.2, 2.4 and 2.6 kernels.
For example i have one box that i installed debian stable on that used a
2.2 kernel which automatically tuned on DMA on the harddrive, didn't do
it on a 2.4 kernel, but on 2.6 one it saw it as DMA able.
Such things can dramatically affect performance, so make sure to compare
what capabilities the kernel thinks your hardware has between the
kernels first...
But i'll grant that the 2.6 kernel is a great deal faster on some of our
test servers.
Regards
Magnus
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