lkai, Thanks for your response. That may explain for some other apps. In our case, the app 'ipadsocial' is pretty much a pure backend app. Most of the load is through cron and deferred jobs. Number of web front requests is close to zero. If you try to visit http://ipadsocial.appspot.com, you will see. We have almost no UI.
Adam On Thu, Oct 21, 2010 at 2:36 PM, Jamie H <ja...@mhztech.com> wrote: > Ikai, > > I understand your response to this post but I'd like to let you know > what I have seen. I see this error "occasionally" when my site has no > load. Ie: 0 instances. For example, in the middle of the night when > no users are on the site my cron runs and I receive this error. To > prevent this I have created "warmup" cron jobs 1 minute before all my > real cron jobs. So far this has worked, but sometimes I do see my > "warmup" cron jobs error out with this error. This leads me to > believe this error can happen on cold starts ? > > > On Oct 21, 2:20 pm, "Ikai Lan (Google)" > <ikai.l+gro...@google.com<ikai.l%2bgro...@google.com> > > > wrote: > > Adam, > > > > The reason this is happening is because your requests take too long to > > execute. App Engine apps will autoscale if they are generally kept as low > > latency requests. The average latency of your requests is 10000ms, so we > > will not add instances. You will need to reduce the latency of your user > > facing calls to under 1000ms (we recommend 800ms, and 400ms) for best > > performance. > > > > Strategies to do this: > > > > - denormalize your data model to emphasize reads > > - move long running jobs to task queues > > > > Your web/user facing requests must be as fast as possible. > > > > -- > > Ikai Lan > > Developer Programs Engineer, Google App Engine > > Blogger:http://googleappengine.blogspot.com > > Reddit:http://www.reddit.com/r/appengine > > Twitter:http://twitter.com/app_engine > > > > On Wed, Oct 20, 2010 at 3:17 PM, Adam Johnson > > <adam.johnson.s...@gmail.com>wrote: > > > > > Hi folks, > > > > > I'm getting tons of this error on my app id 'ipadsocial' yesterday and > today. Could you take a look? Maybe you should increase some of the internal > quotas for my app. It is paid app. > > > > > Thanks, > > > Adam > > > > > "Request was aborted after waiting too long to attempt to service your > request. This may happen sporadically when the App Engine serving cluster is > under unexpectedly high or uneven load. If you see this message frequently, > please contact the App Engine team." > > > > > -- > > > 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<google-appengine%2bunsubscr...@googlegroups.com> > <google-appengine%2bunsubscr...@googlegroups.com<google-appengine%252bunsubscr...@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<google-appengine%2bunsubscr...@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.
