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André,

On 8/25/2011 6:02 PM, André Warnier wrote:
> Just in case, my question was not purely academical, and not trying
> to start a flame.

Belgians don't start flame wars, do they?

> We build small systems for specialised applications, running on 
> disk-less, fan-less boxes similar to the one here : 
> http://www.hacom.net/catalog/legacy-products/lex-neo (don't know
> the supplier, but that's the box). These things are economical,
> ecological (low-power, low-noise), very reliable (no moving parts),
> boot and do everything from an SSD device etc.. (*)

Disk-less box boots from SSD? Maybe you meant "no spinning disk"?

> But they have a limited amount of RAM. So far, we use a basic Linux
> install, on top of which we run whatever else we need.

Just curious: which distro do you use? Something like DSL or just
Debian/RedHat/whatever with most packages not installed?

> I think memory is really relevant when one talks about Java (and
> Tomcat).

Yup. Depending on the application, you can get away with a
(relatively) modest heap size. We operated in production with a "mere"
64MiB heap for years before our user base grew to the point where we
were suffering OOMEs. (Actually, in our last release, we significantly
decreased the amount of memory ever required by a single user by
changing the way we page-through db search results and our memory
usage curves are much gentler than they used to be).

> (*) the only problem is : they are small, noiseless, they do not
> fit in a standard rack, they have no blinking lights etc.. so
> people tend to set them up on a windowsill and forget about what
> they do.

Aah... "magic box that you shouldn't touch". I've seen those, before.
Usually not on window sills, but the point is the same.

- -chris
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