Problem installing from alternate CD

Aere Greenway Aere at
Thu Feb 7 18:51:39 UTC 2013

On 02/07/2013 10:42 AM, Lars Noodén wrote:
> On 02/07/2013 07:04 PM, Aere Greenway wrote:
> [snip]
>> 512 Megabytes of RAM used to be the 'gold-standard' for all of the
>> Ubuntu variants, but that, alas, is no longer the case.  And I realize
>> there is little Lubuntu can do to shield us from the ever-increasing
>> memory requirements of the Linux kernel.
> I've been noticing that my low-end daily use is around 1.1 - 1.5 GB RAM
> on AMD64.  That is unfortunate because my machine only has 1GB and I
> have to rely on swap for the rest.  That just with a mail client, a web
> browser, and a chat client.  A second browser and an SIP client add further.
> Regards,
> /Lars

I keep forgetting about 64-bit systems, because I usually don't use 
them.  My e-mail reflected that unconscious assumption.

I don't know how the internal architecture actually works now, so what I 
say here is based on my experience when we migrated from 16-bit 
addressing to 32-bit addressing.

I won't get into the nitty-gritty details too much, but back then, it 
seemed appalling how much larger the 32-bit addressing programs were 
than the 16-bit.  Yet it was better because we could directly address a 
larger memory space without having to separate areas of memory into 
segments that could be accessed with a 16-bit address-range.

The reason the programs were so much larger, is that in the actual 
machine-language program resulting from compiling a computer language, 
everywhere it referenced memory, it now took 32-bits, rather than the 
16-bits we were used-to.  So the same programs we were used to (using in 
the earlier architecture) were now a lot larger than they used to be.

I suspect we have the same problem with 64-bit addressing, as compared 
to 32-bit addressing.  All memory-references are now twice the size than 
they used to be, so the compiled programs are a lot larger because of 
that necessity.

But with 64-bit architecture, you can address a exponentially more 
memory than with 32-bit architecture.  The ironic part of that, is that 
you need more memory because the programs must be much bigger than they 
used to be.


More information about the Lubuntu-users mailing list