Hey Andrin,
If you hit a hard limit it will be killed immediately, no exception,
no nothing, just dead. If you hit a soft limit it will be killed
after the request finishes. You'll have no way within the app to know
that either case happened.
I view this as a very serious (security) problem within tasks, for
some more info:
http://code.google.com/p/googleappengine/issues/detail?id=6616
Also, please star that. ;)
Robert
On Mon, Feb 20, 2012 at 05:25, Andrin von Rechenberg <[email protected]> wrote:
> I guess that's the same solution as just deploying two different
> versions. A threadsafe one and a non threadsafe one. Or did
> I misunderstand you?
>
> My main concern is having two versions running.
>
> @Brandon: Do you know if an instance is killed during handling requests or
> afterwards?
> And what happens with if there are concurrent requests?
>
>
> Cheers,
> -Andrin
>
>
> On Mon, Feb 20, 2012 at 11:20 AM, Johan Euphrosine <[email protected]>
> wrote:
>>
>> 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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>>
>>
>>
>>
>> --
>> Johan Euphrosine (proppy)
>> Developer Programs Engineer
>> Google Developer Relations
>>
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>
>
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