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Date:      Fri, 1 Jun 2001 20:38:48 +0200
From:      "Karsten W. Rohrbach" <karsten@rohrbach.de>
To:        Alexander Langer <alex@big.endian.de>, chat@FreeBSD.ORG
Cc:        jkh@freebsd.org
Subject:   NMBCLUSTERS setting in default kernel
Message-ID:  <20010601203848.J10477@mail.webmonster.de>
In-Reply-To: <20010601164222.A4578@zerogravity.kawo2.rwth-aachen.d>; from alex@big.endian.de on Fri, Jun 01, 2001 at 04:42:22PM %2B0200
References:  <20010529214403.L85298@mail.webmonster.de> <20010530205056.G29853@mail.webmonster.de> <20010530210351.C65759@rapier.smartspace.co.za> <20010531233829.A58131@zerogravity.kawo2.rwth-aachen.d> <20010601154523.A10477@mail.webmonster.de> <20010601164222.A4578@zerogravity.kawo2.rwth-aachen.d>

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Alexander Langer(alex@big.endian.de)@2001.06.01 16:42:22 +0000:
> Well, I'm more interested in some charts, that shows the performance
> of various NMBCLUSTERS values up to - uhm BIG values (> 2^20).
> Knowing these it could be easier to decide what's better for a certain
> usage.
>=20
> I thought maybe someone has already done
> some, since I could imagine, that a too high value could decrease
> speed again (due to memory utilization overhead).
>=20
> I'm currently using 2^14, which seems to be a good choice, when I take
> a look at your value.
NMBCLUSTERS=3D16384 is my default kernel setting on all machines.
it is also my proposition to get this into the default kernel.
larger values like 256k would make the box slower i think.

jordan: would 16384 make sense or would it kill machines with low mem?

/k

--=20
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