Example of two identical requests doing a simple MemCache fetch with quite
different excecution times 385ms vs 4502ms :
What am I supposed to say to my customers ?
1. 2012-11-27 12:19:25.809
/chateau-de-mouchac-183001.dhtml?m=publications&l=fr&d=d 200 385ms 14kb
Mozilla/5.0
(Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko)
Chrome/23.0.1271.91 Safari/537.11
2. I2012-11-27 12:19:25.511 com.mably.cms.web.PageCacheServlet doGet: At
program start we have : 20535256 bytes
3. I2012-11-27 12:19:25.512 com.mably.cms.theme.web.CookieDeviceResolver
initRenderDevice: Device = {browser:chrome,type:DESKTOP,bot:false}
4. I2012-11-27 12:19:25.512 com.mably.cms.web.PageCacheServlet doGet:
Page is cacheable : view|aghzfnZuY3RzMXIJCxIBZBjZlQsM|publications|fr|d
5. I2012-11-27 12:19:25.512 com.mably.cms.web.PageCacheUtils
getPageCacheFullId: Added to ThreadLocal :
mouchac.vinocities.com|default|view|aghzfnZuY3RzMXIJCxIBZBjZlQsM|publicati
6. I2012-11-27 12:19:25.520
com.mably.cms.web.PageCacheServlet$PageCacheChecker
check: In cache, verify OK
:mouchac.vinocities.com|default|view|aghzfnZuY3RzMXIJCxIBZBjZlQsM|publi
7. I2012-11-27 12:19:25.520 com.mably.cms.web.PageCacheServlet doGet:
After running the program, we have : 20071256 bytes
1. 2012-11-27 12:19:09.395
/chateau-de-mouchac-183001.dhtml?m=publications&l=fr&d=d 200 *4502ms*
14kb Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like
Gecko) Chrome/23.0.1271.91 Safari/537.11
2. I2012-11-27 12:19:09.325 com.mably.cms.web.PageCacheServlet doGet: At
program start we have : 23017432 bytes
3. I2012-11-27 12:19:09.326 com.mably.cms.theme.web.CookieDeviceResolver
initRenderDevice: Device = {browser:chrome,type:DESKTOP,bot:false}
4. I2012-11-27 12:19:09.326 com.mably.cms.web.PageCacheServlet doGet:
Page is cacheable : view|aghzfnZuY3RzMXIJCxIBZBjZlQsM|publications|fr|d
5. I2012-11-27 12:19:09.327 com.mably.cms.web.PageCacheUtils
getPageCacheFullId: Added to ThreadLocal :
mouchac.vinocities.com|default|view|aghzfnZuY3RzMXIJCxIBZBjZlQsM|publicati
6. I2012-11-27 12:19:09.338
com.mably.cms.web.PageCacheServlet$PageCacheChecker
check: In cache, verify OK
:mouchac.vinocities.com|default|view|aghzfnZuY3RzMXIJCxIBZBjZlQsM|publi
7. I2012-11-27 12:19:09.339 com.mably.cms.web.PageCacheServlet doGet:
After running the program, we have : 22546336 bytes
App-id : vncts1
On Tuesday, November 27, 2012 12:11:45 PM UTC+1, Francois Masurel wrote:
>
> Could it also be related to really bad Get latency lately ?
>
> Let's compare today's Java dynamic get latency with April 25 numbers :
>
> Today<http://code.google.com/status/appengine/detail/serving-java/2012/11/27#ae-trust-detail-helloworld-get-java-latency>:
>
>
>
> <https://lh4.googleusercontent.com/-PzOlG7y3TRM/ULSealyN6EI/AAAAAAAAwnM/yiy4jqL72hk/s1600/PrtScr+capture.jpg>
> 04/25/2012<http://code.google.com/status/appengine/detail/serving-java/2012/04/25#ae-trust-detail-helloworld-get-java-latency>:
>
>
> <https://lh5.googleusercontent.com/-lJ3ySBW_ky0/ULSeooDuWkI/AAAAAAAAwnU/NMHkvcNWgqM/s1600/PrtScr+capture_2.jpg>
> In my case, some requests running most of the time in less than 200ms can
> take as much as 7s without any instance loading going on.
>
> When will things start to stabilize a bit so we can run real businesses on
> GAE ?
>
> Am I the only one encountering such problems ? I sometimes feels like
> being on a desert island here :-)
>
> François
>
>
>
>
> On Saturday, November 17, 2012 4:21:28 PM UTC+1, Francois Masurel wrote:
>>
>> I've notice lots of user facing loading requests since a few hours
>> (days?).
>>
>> Just check the screenshot below. Two new instances have been started to
>> serve only 13 (12 + 1) requests though another instance was already running
>> and available and obviously was not overloaded as it had only served 105
>> requests during the last hour :
>>
>>
>> <https://lh4.googleusercontent.com/-UxI0M8fnvw0/UKep9Wkb_VI/AAAAAAAAwN0/wxKaPhZvXlI/s1600/Instances+-+VinoCities+-+Google+Chrome.jpg>
>>
>> My application instance settings are all set to automatic and pending
>> latency set to 10s :
>>
>>
>> <https://lh4.googleusercontent.com/-TxgVTyTvqJM/UKeqaNNQvBI/AAAAAAAAwN8/fKUP3ftluk8/s1600/Application+Settings+-+VinoCities+-+Google+Chrome.jpg>
>>
>> Did something change on GAE side recently ?
>>
>> These user facing loading requests are really killing my business as my
>> users are getting really upset about it.
>>
>> Thanx for your help.
>>
>> François
>>
>> App Id = vncts1
>>
>
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