Anupam, What are the actual errors you are seeing? Are errors in your app's error log?
Further comments / questions inline: On Wed, Apr 28, 2010 at 12:31 AM, WeShine Tech <intelltest.ad...@gmail.com> wrote: > Hello Robert, > > Are you saying that you have other clients (customers) running the > same code on different deployments ? > No. So what happened is at my clients site the > application stopped responding. So I started using the earlier versions of > my application and those seemed to work fine. What has changed between versions? Have you added additional request handlers, or otherwise increased the work that needs done to load your app? > When you say the log shows latency issues I assume you mean the requests > are taking > a lot of CPU time? > That is correct. But the same requests work absolutely fine otherwise. > So why would some requests take a lot of CPU time only on > some occasions where as work efficiently most of the times? Could you share > some tippers for resolving this issue. If the app sits idle it will be unloaded from the app severs. As I understand, apps may be more aggressively unloaded during times when the overall traffic to app engine itself is high. What you are describing sounds like this could be the issue. Look in your apps info log for messages like: 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. > The application is not a very high traffic one because of its nature. > However after receiving high amount of load for almost two hours it went > down. Also it has performed very well with more traffic in the past. So I am > not sure it could be the Cold Start. This is almost the definition of the 'cold start' problem: it does well under load, but once there is a drop in traffic you get performance issues. > Thanks and Regards, > Anupam M. > > > > > On Wed, Apr 28, 2010 at 9:31 AM, Robert Kluin <robert.kl...@gmail.com> > wrote: >> >> Anupam, >> Are you saying that you have other clients (customers) running the >> same code on different deployments, or are you saying you have loaded >> this app more heavily while running the current code? When you say >> the log shows latency issues I assume you mean the requests are taking >> a lot of CPU time? >> >> It sounds like the app is not very high traffic. Could this be the >> cold start issue? If you hit the site a lot (once every couple >> seconds) does it respond OK? >> >> >> Robert >> >> >> >> >> >> >> >> On Tue, Apr 27, 2010 at 11:35 PM, WeShine Tech >> <intelltest.ad...@gmail.com> wrote: >> > I did look into the problem and have been suggested that it could be due >> > to >> > latency issues. Please could you guide me through as to how to fix this. >> > I >> > have used the same code with more number of clients before but never >> > faced a >> > problem like this. >> > The logs also show latency issues. And I did run the older version of my >> > application using the appspot url. The older version performed just >> > fine. >> > However I did not try running the application using the >> > "appname.appspot.com" url. >> > >> > >> > On Tue, Apr 27, 2010 at 11:44 PM, Robert Kluin <robert.kl...@gmail.com> >> > wrote: >> >> >> >> Were there any actual exceptions in the app's log? >> >> >> >> Did you see the requests in the request log? >> >> >> >> If you were using a custom domain, could you access the site directly >> >> at the 'appname'.appspot.com url? >> >> >> >> Robert >> >> >> >> >> >> >> >> >> >> >> >> >> >> On Mon, Apr 26, 2010 at 9:52 AM, WeShine Tech >> >> <intelltest.ad...@gmail.com> wrote: >> >> > Hello, >> >> > I have an application which requires resources just on some >> >> > particular days. However today my application actually failed at my >> >> > clients site. The application logs do read some high CPU usage for >> >> > some of the url but that is it. It would completely stop responding >> >> > at >> >> > times for all and any requests. Please suggest me some work around >> >> > for >> >> > this problem. I have started my billing and have allowed a large >> >> > number of resources to be consumed per day. The consumption shown in >> >> > the admin console is as low as 1% of what has been allocated. >> >> > >> >> > Do let me know if there is any more information required to be shared >> >> > from my side. But the problem is extremely critical and needs to be >> >> > fixed as soon as possible. >> >> > >> >> > Any help is appreciated. >> >> > >> >> > Thanks and Regards, >> >> > Anupam M. >> >> > >> >> > -- >> >> > You received this message because you are subscribed to the Google >> >> > Groups "Google App Engine" group. >> >> > To post to this group, send email to >> >> > google-appeng...@googlegroups.com. >> >> > To unsubscribe from this group, send email to >> >> > google-appengine+unsubscr...@googlegroups.com. >> >> > For more options, visit this group at >> >> > http://groups.google.com/group/google-appengine?hl=en. >> >> > >> >> > >> >> >> >> -- >> >> You received this message because you are subscribed to the Google >> >> Groups >> >> "Google App Engine" group. >> >> To post to this group, send email to google-appeng...@googlegroups.com. >> >> To unsubscribe from this group, send email to >> >> google-appengine+unsubscr...@googlegroups.com. >> >> For more options, visit this group at >> >> http://groups.google.com/group/google-appengine?hl=en. >> >> >> > >> > -- >> > You received this message because you are subscribed to the Google >> > Groups >> > "Google App Engine" group. >> > To post to this group, send email to google-appeng...@googlegroups.com. >> > To unsubscribe from this group, send email to >> > google-appengine+unsubscr...@googlegroups.com. >> > For more options, visit this group at >> > http://groups.google.com/group/google-appengine?hl=en. >> > >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google App Engine" group. >> To post to this group, send email to google-appeng...@googlegroups.com. >> To unsubscribe from this group, send email to >> google-appengine+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/google-appengine?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to google-appeng...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
