Hi Robert, After all, thank you for your recomendation of use Appstats. I'm going to use it.
Undeploy application doesn't mean lose an instance because I see a lots of loading request in my logs. We've developed a warm up servlet to start up the application into dynamic instances when I've activated "always on" feature. But we've detected into always on instances that the application is shutting down too. Also I think the algorithm for dispatching requests between instances is "Round Robin" and when we haven't got requests enough. So we've got a lot of loading requests because the time between requests into the same instance is long enough to shut down the application for appengine. Eduardo. 2011/5/4 Robert Kluin <robert.kl...@gmail.com> > Hi Eduardo, > It sounds like you might benefit from using Appstats. I've heard > Java apps tend to have large startup times. However, from what you're > describing it sounds like your app is getting new instances spun up > (16 in total) but it is not serving requests quickly enough. At least > if I understand the issues correctly. > > http://code.google.com/appengine/docs/java/tools/appstats.html > > When you say 'undeploy' the application, you mean you lose an > instance? As in you go from, say, 16 to 15 instances? Also what > Geoffrey said is correct (of course ;), only active instances are > listed. Instances can be spun up and down at any time. Do you see > lots of loading requests in your logs? > > > > Robert > > > > > > On Tue, May 3, 2011 at 13:05, Eduardo Perrino <eduardo.perr...@gmail.com> > wrote: > > > > > > 2011/5/3 Geoffrey Spear <geoffsp...@gmail.com> > >> > >> > >> On May 3, 11:55 am, Eduardo Perrino <eduardo.perr...@gmail.com> wrote: > >> > Hi Robert, > >> > > >> > I try to explain better: > >> > > >> > Our application has 16 instances assigned by appengine automatically > and > >> > three of them are "always on". It doesn't have many requests, in fact, > >> > the > >> > time between them is large enough to appengine undeploy the > application. > >> > So > >> > appengine is starting the application over and over. > >> > >> If the Instances section of the control panel shows that you currently > >> have 16 instances, that's how many copies of your application are > >> currently running. Instances that are "undeployed", as you put it, > >> won't show in that panel. > > > > This is not true, because sometimes when an instance has received a > request > > the latency time is increased very much and if you go to the logs section > > it's posible to see that the application has been started. > > > > I think, see the instances is not mean that the application is started. > > > > > >> > >> -- > >> 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-appengine@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-appengine@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-appengine@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-appengine@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.
