the short answer is, pay $9/month to have 3 always on instances :)

http://code.google.com/appengine/docs/adminconsole/instances.html#Always_On

On Fri, Jun 10, 2011 at 12:11 PM, YF CAO <[email protected]> wrote:
> about web application, it will stop if long time not visit.
> when someone visits it will start again.
> i think its startup is very slow.
>
>
> 2011/6/10 Robert Kluin <[email protected]>
>>
>> Sounds like you're using RPCs serially, which will often lead to poor
>> performance.  Profile your app with Appstats:
>>   http://code.google.com/appengine/docs/java/tools/appstats.html
>>
>> then try to batch any operations you can.
>>
>>
>> I think Java typically has long startup times, but I've got no idea
>> what is 'normal' for Java.
>>
>>
>>
>> Robert
>>
>>
>>
>> On Fri, Jun 10, 2011 at 09:54, YF CAO <[email protected]> wrote:
>> > my app is a simple Hello World JSP page, not use any framework.
>> > first visit, about 5s. second and after, about 1s.
>> > if add several times db access, about 8s.
>> >
>> >
>> > 2011/6/10 Tim Hoffman <[email protected]>
>> >>
>> >> Is this just a statement, or are you asking for help?
>> >> I will assume you asking for advice.
>> >> Appengine start up times is something your can't ignore.
>> >> Do some profiling and see what is going on.  Try to do things lazily.
>> >> If you are asking for help I would suggest you mention if your using
>> >> java
>> >> or python and what frameworks
>> >> Rgds
>> >> T
>> >>
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