BTW, is there any reason to see that the same request with same data, doing
the same thing, and same api calls, has different cpu_ms ?
2011-05-23 12:35:00.009 "GET /?&......................." 200real=*127ms
cpu=257ms api=0ms* overhead=0ms (3 RPCs) 2011-05-23 12:34:58.763 "GET
/?&............." 200real=*818ms cpu=1884ms api=0ms *overhead=0ms (3 RPCs)
2011-05-23 12:34:57.495 "GET /?xxxxxxxxxxxxxxxxxxxxxxxxxxx" 200real=*814ms
cpu=1873ms* api=0ms overhead=0ms (3 RPCs) 2011-05-23 12:34:56.917 "GET
/?xxxxxxxxxxxxxxxxxxxxxxxxxxxx" 200real=*135ms cpu=260ms* api=0ms
overhead=0ms (3 RPCs)
On Mon, May 23, 2011 at 5:03 PM, Brandon Wirtz <[email protected]> wrote:
> Pay for always on, it will go away.
>
>
>
> *From:* [email protected] [mailto:
> [email protected]] *On Behalf Of *Sarang
> *Sent:* Monday, May 23, 2011 12:52 PM
> *To:* [email protected]
> *Subject:* [google-appengine] Poor performance since the past 2-3 days
>
>
>
> I have a python/django app that works blazing fast on the dev_appserver
> locally, but is taking painfully long to load on GAE since the last 2-3
> days. Can anyone please let me know how to resolve it?
>
>
>
> Here are the issues:
>
>
>
> 1. I routinely get
>
>
> 1. 2011-05-23 12:17:06.505 / 200 373876ms 793cpu_ms 15kb AppEngine-Google;
> (+http://code.google.com/appengine)
>
> 0.1.0.1 - - [23/May/2011:12:17:06 -0700] "GET / HTTP/1.1" 200 15939 -
> "AppEngine-Google;
>
> ...
>
> 2. I2011-05-23 12:17:06.505
>
> This request caused a new process to be started for your application, and
> thus caused your application code to be loaded for the first time. This
> request may thus take longer and use more CPU than a typical request for your
> application.
>
>
>
> See more within the half hour:
>
>
> 2011-05-23 12:18:09.581 / 200 3062ms 653cpu_ms 15kb AppEngine-Google; (+
> http://code.google.com/appengine)
> 2011-05-23 12:17:06.505 / 200 373876ms 793cpu_ms 15kb AppEngine-Google; (+
> http://code.google.com/appengine)
> 2011-05-23 12:12:43.657 / 500 167275ms 70cpu_ms 1kb Mozilla/5.0 (Windows
> NT 6.1; WOW64) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.65
> Safari/534.24,gzip(gfe),gzip(gfe),gzip(gfe)
> 2011-05-23 11:43:12.087 / 200 503348ms 746cpu_ms 15kb AppEngine-Google; (+
> http://code.google.com/appengine)
>
> all these for my landing page which loads in a few milliseconds on the
> local server.
>
> I have taken all the precautions documented: cron job, main() in python
> code, etc. I have the keep_alive cron job running every 1 minute. However, I
> have observed that many times it does not start every minute and that leads
> to high load times. Example:
>
>
>
>
> 2011-05-23 12:07:49.777 / 200 2999ms 23cpu_ms 15kb AppEngine-Google; (+
> http://code.google.com/appengine)
>
>
> 2011-05-23 12:06:46.769 / 200 13ms 0cpu_ms 15kb AppEngine-Google; (+
> http://code.google.com/appengine)
> 2011-05-23 12:05:46.749 / 200 11ms 23cpu_ms 15kb AppEngine-Google; (+
> http://code.google.com/appengine)
>
> You can observe that the when the spacing between cron jobs is > 1minute,
> the load times suddenly increase.
>
>
>
> My 2 key questions:
>
>
>
> 1. Any way for me to profile and find out where the app engine gets stuck
> when I get those enormously large load times?
>
> 2. Any way to ensure cron is fired within a minute?
>
> Appreciate any help.
>
>
>
> Regards,
>
> Sarang
>
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