Yes, you're right. As a new instance is being spun up, there will be some
user that will have to deal with a loading request.

On Sun, Jan 24, 2010 at 3:50 PM, Spines <[email protected]> wrote:

> If I could get a definitive answer on this that would be great.
>
> I know that when your Google App Engine (GAE) app has 0 instances
> running (because it has been idle for a bit), and a user requests a
> page, the user has to wait for the instance to boot up and do all of
> the instantiation which can cause the user to wait a significant
> amount of time.
>
> My question is about the situation when your GAE app already has 1
> instance running, but begins to experience heavy load and starts
> booting up a second instance.
>
> In this case, which will happen:
>
> 1. Will a user end up having to wait for the second instance to
> instantiate before getting their request responded to?
>
> 2. Will no requests be sent to the second instance until it has fully
> instantiated, thus not making a user wait an extended amount of time?
>
>
> If the answer is number 1, then there will always be some users who
> have to wait an unreasonable amount of time to get there request
> responded to.  Especially in my case since I use Spring, Spring
> Security, and JDO.  And JDO takes about 5 seconds to initialize,
> Spring takes about 2 seconds, and Spring Security takes about 1 second.
>
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>


-- 
Ikai Lan
Developer Programs Engineer, Google App Engine
http://googleappengine.blogspot.com | http://twitter.com/app_engine

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