You might try to submit a billing issue asking for a credit or something:
  
http://code.google.com/support/bin/request.py?contact_type=AppEngineBillingSupport

I'd have documentation ready to demonstrate that the app is
experiencing abnormal latency leading to higher charges.  Have you
tried profiling with AppStats?  One thing I find very odd about your
log entry is that you're seeing 0 api cpu ms, yet you're making a
memcache call.  Is that the case with all of your high-cpu requests?
Is it the case with all of your "normal" requests?


Robert









On Mon, Aug 8, 2011 at 14:53, observer247 <[email protected]> wrote:
> I would like to know clearly if the over-usage charges are:
>
> expected for the kind of usage I have and the code we have ? or
> a bug caused by some bug or issue with app engine.
>
> Based on that, we will make a decision. Because a simple memcache read
> and return was using high cpu numbers. We need that answer to decide
> whether to:
>
> optimize the code ? or
> wait for Google to fix issues on their side ? or
> not wait for an infinite time before we can get an answer while paying
> $600 a month and move to another host ?
>
> As days are flying (15 days gone by already), I am almost decided that
> it was a bad idea to assume that it was ok to host my application on a
> proprietary network hosted by a reliable company. Now I guess we
> should spend the next 15 days trying to rewrite the code in php/mysql
> and move to a more portable host.
>
> We are still waiting for the answer.
>
>
> On Aug 3, 1:27 am, Johan Euphrosine <[email protected]> wrote:
>> Sorry for the late followup, I just updated your issue.
>>
>> FYI, we believe that the problems experienced by most of the Apps on
>> this thread were due to a temporary datastore latency, as you can see
>> there:http://code.google.com/status/appengine/detail/datastore/2011/07/27#a...
>>
>> This cascaded into a higher HTTP latencies for some Python
>> applications running on Master/Slave Datastore Replication 
>> system:http://code.google.com/status/appengine/detail/serving/2011/07/27#ae-...
>>
>> We offered the affected app to assist them to migrate to HRD, where
>> apps are not subject to those transient latency issues.
>>
>> For the record Issue #5415 might be a different beast, as appstats
>> doesn't report any datastore operation but still high latency.
>>
>> I already escalated it to the engineering team and will followup on
>> the bug report once I have any updates.
>>
>> Hope that helps.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> On Wed, Aug 3, 2011 at 4:18 AM,observer247<[email protected]> wrote:
>> > Issue number is 5415
>>
>> > It has been more than a week and I am yet to get a useful response on
>> > the ticket.
>>
>> > On Jul 21, 4:20 am, Johan Euphrosine <[email protected]> wrote:
>>
>> >> Feel free to open a Production Issue for problem like this affecting
>> >> directly your application 
>> >> operation:http://code.google.com/p/googleappengine/issues/entry?template=Produc...
>>
>> >> If you do so, please reply to this thread with the issue number, so we
>> >> can followup.
>>
>> >> Hope that helps.
>>
>> >> On Thu, Jul 21, 2011 at 10:24 AM,observer247<[email protected]> wrote:
>> >> > Is this is because of the new pricing, I would rather move out of
>> >> > Google app engine.
>>
>> >> > We have over 10 apps serving our iPhone apps. It will take us a lot of
>> >> > effort to port this code to php/mysql but I guess if the pricing
>> >> > changes like this, we cannot afford to pay such high prices.
>>
>> >> > I am not sure if there is a phone number or support chat. When I am
>> >> > paying $1000 per month for a service, I would expect to talk to a real
>> >> > person and share with him the issues I am facing.
>>
>> >> > On Jul 20, 1:14 am,observer247<[email protected]> wrote:
>> >> >> Almost the same usage is now triggering 10times the daily cost ! Not
>> >> >> sure what changed as far as billing.
>>
>> >> >> Checking appstats and instances.
>>
>> >> >> On Jul 19, 2:55 pm, Barry Hunter <[email protected]> wrote:
>>
>> >> >> > Have you tried 
>> >> >> > AppStats?http://code.google.com/appengine/docs/python/tools/appstats.html
>>
>> >> >> > On Tue, Jul 19, 2011 at 8:31 PM,observer247<[email protected]> wrote:
>> >> >> > > My python app engine app is somewhat popular, mainly used as via 
>> >> >> > > api
>> >> >> > > from my iphone app.
>>
>> >> >> > > Recently I am seeing high over usage charges.
>>
>> >> >> > > The most used call already use 15 CPU hours , with stats:
>> >> >> > >        3.7 calls/sec   26.15K requests in 12hrs        603 (0) 
>> >> >> > > [cpu]
>>
>> >> >> > > HTTP/1.1" 200 1839 - "QandA/5.4 CFNetwork/485.12.7 Darwin/10.4.0"
>> >> >> > > "may.latest.nuvusanswers.appspot.com" ms=1490 cpu_ms=467 
>> >> >> > > api_cpu_ms=0
>> >> >> > > cpm_usd=0.013200 pending_ms=1058 throttle_code=1
>> >> >> > > instance=00c61b117c8b0de1286e8d90c22f4d5b3897c8
>>
>> >> >> > > This call just reads a memcache and returns the data. Thats it. 
>> >> >> > > Will
>> >> >> > > really like to know are memcache reads so expensive ? Am I using a 
>> >> >> > > lot
>> >> >> > > more memcache that I need ?
>>
>> >> >> > > I have removed all other versions and have just one version 
>> >> >> > > running.
>> >> >> > > The number of instances now is
>>
>> >> >> > > 28 total        0.510 (Average QPS)     281.1 ms (Average Latency) 
>> >> >> > >      59.5 MBytes
>> >> >> > > (Average Memory)
>>
>> >> >> > > As this is the most expensive call, I am first going after that. 
>> >> >> > > but I
>> >> >> > > am seeing most of my calls are now using a LOT of CPU. Will be 
>> >> >> > > great
>> >> >> > > if anyone can point me to things I can debug to find out the high
>> >> >> > > usage across the board.
>>
>> >> >> > > Thank you for reading this !
>>
>> >> >> > > --
>> >> >> > > You received this message because you are subscribed to the Google 
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>> >> >> > > [email protected].
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>> >> >> > > For more options, visit this group 
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>>
>> >> > --
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>>
>> >> --
>> >> Johan Euphrosine (proppy)
>> >> Developer Programs Engineer
>> >> Google Developer Relations
>>
>> > --
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>>
>> --
>> Johan Euphrosine (proppy)
>> Developer Programs Engineer
>> Google Developer Relations
>
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