Hi Andrin,
Have you considered using a dynamic B2 backend?
If the request originate from a form you can even address the backend by
name directly with:
backendname.appid.appspot.com
Hope that helps.
On Mon, Feb 20, 2012 at 11:15 AM, Andrin von Rechenberg
<[email protected]>wrote:
> Hey there
>
> I'm planning to migrate to Python 2.7.
>
> I'm now running on Python2.5. There is one kind of request
> (lets call it people-search) that uses A LOT of ram.
> From time to time instances get killed because they exceed
> the allowed memory allocation. These requests do a lot of
> RPCs. One people search uses about 100mb of ram.
>
> In Python 2.7 I would guess that one instance will handle
> many people-searches at the same time, because they
> mostly wait for RPCs. That means that an instance
> will go out of memory much more often, because every
> pending request will use 100mb. You handle 2 at the same
> time, an F1 instance dies. I'm afraid that I will end up in a
> crash loop pretty soon.
>
> Am I right in my assumption?
>
> Is there a way to limit the amount of people-searches
> that one instance handles at the same time?
> Like threadsafe:false for a certain handler?
>
> The only solution I see at the moment is to deploy 2 versions
> of my app. The main version with threadsafe enabled and
> a special version with threadsafe disabled.
> The main app would then not handle people-searches directly,
> but do a urlfetch to the threadsafe disabled version for
> people-searches. This way one instance would always
> only do one people-search because threadsafe is disabled.
>
> But it's soooo ugly from a maintenance point of view.
> Really ugly.
>
> Any better suggestions?
>
> Cheers,
> -Andrin
>
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