lp:bzr/2.0 upgrade --2a runs out of memory

[John Arbash Meinel]

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...

> 
> At about 20min in, it had finished the conversion peaking at 1GB or so,
> and then started to repack everything to optimize the final repository
> structure.
> 
> Overall peak memory consumption was 1.3GB.
> 
> I wonder, are you on a 64-bit platform? A lot of python objects roughly
> double in size on 64-bit. (PyInt == 32=>64bit, pointers 32=>64, etc.)
> 
> John
> =:->

I should also mention that if you are just in a hurry to get the
conversion, I have a completed one here that is 108MB in size. So not a
whole lot smaller than the source 129MB, but a modest improvement.
Hopefully the bigger improvement will be the extraction speed and the
inventory layout change.

John
=:->
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