Why GAE request takes so much time?

[Andrey Ilinykh]

Hello, everybody!

I have simple GWT application which is running against GAE.  

The problem is - simple query takes too long. I put log result below. As you can see it takes almost 4 seconds (this is not first request which causes a new process started). I added logging into my data access class (RawData).

It shows that all data reading takes only 29 ms. So, my question is - who consumes rest of cpu? How can I profile my application to get clear picture?

Thank you,

  Andrey

2012-08-12 20:48:16.781 /gwtRequest 200 3918ms 87kb Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.168 Safari/535.19

98.210.16.181 - - [12/Aug/2012:20:48:16 -0700] "POST /gwtRequest HTTP/1.1" 200 87656 "http://hikeinthecloud.appspot.com/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.168 Safari/535.19" "myapp.appspot.com" ms=3918 cpu_ms=3028 api_cpu_ms=39 cpm_usd=0.093998 instance=00c61b117cd5d51838dc0c430d3d0123c842a9

I 2012-08-12 20:48:12.905

domain.RawData getData: getData 1344719667, 1344725313

I 2012-08-12 20:48:12.907

domain.RawData getData: Start getting data...

I 2012-08-12 20:48:12.908

domain.RawData getData: Finish getting data. 1ms

I 2012-08-12 20:48:12.936

domain.RawData getData: Return data. 2 backets, 29ms

[Rerngvit Yanggratoke]

You can use Appstat to profile your application. Have a look at http://googleappengine.blogspot.com/2010/03/easy-performance-profiling-with.html.

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Best Regards,
Rerngvit Yanggratoke