[WBEL-users] swap size question

[Conor Wynne]

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On Thu, 2004-12-23 at 18:56, M. Hakan Aksu wrote:
> Hi all-
> I have a system with 16 Gigs of RAM, what is the swap size would you reco=
mmend?
> I know the old rule of thumbs that says "you need twice the size of
> RAM", that may be true if you have 256MB of RAM but I am not sure if
> that is still necessary with systems that has huge amounts of RAM. I
> am planning to start with a 4Gigs swap partition and grow it if
> necessary. This server will mainly run oracle and weblogic.
> I would appreciate you comments.

Oracle use lots of RAM, but I doubt that you would require twice that in
swap. 32 gigs swap is a bit OTT.=20

Starting with 4gigs sounds sensible. But monitor the situation because
if you run out of SWAP, and then the system _needs_ to swap  then you
could be looking at a kernel panic.=20

It will likely start with some zombie processes and eventually bork.=20
Also, what kernel will you be running? There are kswapd issues in the
"supported" kernels (oracle supported), 2.4.21-15EL and 2.4.21-20EL. So
watch the swappiness.=20

But since Oracle only support RHEL and I doubt WBEL, then you can safely
upgrade to the latest 2.4.21-27EL and be done with it.=20

> Have a nice holiday season and a happy new year!

Happy Chrimbo to you too.

> cheers,
> -Hakan
> _______________________________________________
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> Whitebox-users@beau.org
> http://beau.org/mailman/listinfo/whitebox-users
--=20
Conor Wynne
Dublin,
Irlande.

GPG Key: http://www.conorwynne.com/gpg-key

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