Hi Poke,

Is your application using Python or Java ? What is your application id ?

1/ 2/ I don't think raising Min-Idle-Instance would help your cost to
go down, on the opposite it is likely to introduce new costs since the
scheduler will make sure there is always at least Min-Idle-Instance
around to serve potential traffic spike.

I think you should consider paying for *Reserved Instance Hours* once
the new pricing model is out.

As described here:
http://code.google.com/appengine/kb/postpreviewpricing.html#different_on_demand_instance_reserved

It will allow you to get a discount on instances hours by
pre-committing to a certain amount of instance hours per week.

3/ About Cache-Control header, can you give us a public url of one of
your handler that is reproducing this issue ?

Thanks in advance.

On Wed, Sep 28, 2011 at 3:30 AM, poke <buidinhngoc.a...@gmail.com> wrote:
>
> Thanks .
> But please answer me 3 question to help me understand , how it work ?
>
> On Sep 28, 2:27 am, Tapir <tapir....@gmail.com> wrote:
> > Your app handles 20 req/s, which means 1.728M req/day.
> > If each page uses 3.5 requests, then you app has 500K pageviews/day.
> > I think you at least 3-6 full instances to run your app.
> > I don't think there is a way you can spend under 30$.day on app
> > engine
> > with the new price model.
> >
> > On Sep 27, 6:27 pm, poke <buidinhngoc.a...@gmail.com> wrote:
> >
> >
> >
> >
> >
> >
> >
> > > My application using about 20 req/s .
> > > I tried many ways to optimize my application before new price model apply 
> > > .
> > > But daily cost always getter than 30$ perday .I have 3 question .
> >
> > > 1.I think i increase  number of resident instances will help cost go to 
> > > down
> > > . I'm true ?
> > > 2.How to increase  number of resident instances ? And how many Resident
> > > instances are fit for me ?
> > > 3.On dynamic page i set two header Cache-Control: public, max-age=300 and
> > > Exprites : "one hourse after".
> > > But number of requests to instance,resource usage,RPC apis not down  .
>
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--
Johan Euphrosine (proppy)
Developer Programs Engineer
Google Developer Relations

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