Yes, this is done gracefully. I agree about more documentation about our serving infrastructure. I'd like to describe more general principles, however, such as to design statelessly, applications can be loaded/unloaded at any time, etc, as implementation details are likely to change. Let me revisit our current docs and see if there's a way we can improve them.
-- 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 27, 2010 at 8:06 PM, David Parks <davidpark...@yahoo.com> wrote: > Does appengine do this in a way which is safe to a heavily-loaded > application? i.e. load the new instance while the old instance is still > serving requests and then simply re-direct requests to the new instance? > > Something like this should really be documented. > > > > > > *From:* google-appengine@googlegroups.com [mailto: > google-appeng...@googlegroups.com] *On Behalf Of *Ikai Lan (Google) > *Sent:* Thursday, October 28, 2010 6:50 AM > *To:* google-appengine@googlegroups.com > *Subject:* Re: [google-appengine] Instance maximum number of requests > > > > Yes. Application instances are meant to be relatively short lived. Once > each instance has served a certain amount of requests, we will gracefully > terminate it and spin up a new instance to take its place. The number of > requests to trigger this limit is subject to change for performance tuning > reasons, but it should be in the ballpark of tens of thousands of requests. > > > -- > > 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 27, 2010 at 1:50 PM, nickmilon <nickmi...@gmail.com> wrote: > > I was doing some load tests on app engine today when I noticed a new > Info message in the logs: "After handling this request, the process > that handled this request reached the maximum number of requests that > may be handled in a single process' lifetime, and exited normally." > > So what that supposed to mean ? > Up to know we new that application instances are automatically > terminated after some inactivity time out. If I understand this > message well now we know that a process can be terminated after > handling so many requests. How many exactly ? is this a new magic > number ? Lets hope we will have some answers from the always helpful > App Engines 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-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<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<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.
