exposing hidden packages with runghc

Iain Barnett iainspeed at gmail.com
Wed Jul 8 05:29:03 EDT 2009


2009/7/6 Malcolm Wallace <Malcolm.Wallace at cs.york.ac.uk>

> The machine is an old compaq with 2.4Ghz P4 and 40Gb drive with lots of
>> space, since I only just installed it, and 256Mb RAM.
>>
>> ... the whole machine was so locked up I could barely type ...
>>
>
> There is your answer I think - the physical memory is too small, and the
> machine was thrashing the swapspace.  When that happens, it easily adds
> several orders of magnitude to the time taken to get anything done.
>
> As I wrote those words I thought it might be said, but let me put it
another way. No other install on this machine has taken anywhere close (i.e.
they are all in minutes or 10's of minutes). It's the ONLY one that has had
this effect.

It's not the physical memory - or if it is, then it's the program's fault
for using way too much. Would be nice to have more, of course, but 256
should enough for what I'm doing.

Iain
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