On 26 juil. 2013, at 09:40, julianb <julian....@gmail.com> wrote:

> I don't think the queryset needs to be loaded into memory. There is an 
> iterator() method available:

I don't think .iterator() does what you expect. See 
http://thebuild.com/presentations/unbreaking-django.pdf, slide 62 and 63. If 
you're careful, model instances will be garbage-collected, but you still have 
the entire psycopg result set in memory.

To improve performance in this case you're probably better off with .values() 
or .values_list(), or more likely by splitting your sitemap.

-- 
Aymeric.

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