Have you tried AppStats?
http://code.google.com/appengine/docs/python/tools/appstats.html

On Tue, Jul 19, 2011 at 8:31 PM, observer247 <prem...@gmail.com> 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 !
>
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