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Gordon Henderson wrote:
However, I've no experience of more than 4GB of RAM in a 32-bit system, so just wondering if anyones done this - basically what I'm trying to do is avoid a complete re-install on the box (which is 300 miles away) with 64-bit Debian (although compiling a kernel to cope with the added memory is fine)Any experiences? good/bad/indifferent?
Not a lot of experience but my guess is it will "just work" unless the individual processes exceed any of the process limits (which can in many cases be "fixed" with sysctl/ulimit if the values aren't insanely large).
Debian have stock "BIGMEM" kernels so compiling your own shouldn't be needed unless you've fiddled here already.
I have this nagging suspicions that "BIGMEM" is there by default now on Debian for some reason that I can't immediately Google up - but that might have been a special case I was looking at or some such.
What process needs that much RAM?I assume some huge database? This is going to be the issue, whether the process really does fit into 4GB address space with the various restrictions that apply.
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