This is a post from GAE Developer on 15 Jan 2010. Until now the problem still persists.
From: Ikai Lan <i...@google.com> Date: Fri, 15 Jan 2010 15:32:58 -0800 Local: Sat, Jan 16 2010 7:32 am Subject: App Engine cold starts and overly aggressive cycling Reply | Reply to author | Forward | Print | Individual message | Show original | Report this message | Find messages by this author Hey everybody, We've been seeing more and more reports of applications being cycled out overly aggressively, resulting in some folks implementing (discouraged) workarounds to keep their application from being cycled out. The primary symptom of this problem is that your application will see lots of "loading requests" that fire up a new JVM, which, as many of you know can take anywhere from a few seconds with naked servlets to as much as twenty seconds when loading something like Spring MVC, JRuby on Rails or Grails. In theory, there is enough capacity such that as long as you get some traffic every few hours, you should not be getting cycled out, but we have been seeing reports of applications being cycled after only a minute or less. To help us figure out if these are app specific issues or App Engine issues, can you post the following information if you believe this is happening to you? - What is your application ID? - How do you know it is being cycled out? You'll need to insert some code that only gets called when the app cold starts. - How much time of inactivity does it take before your application is cycled out? - What time or days does this seem to happen? - What frameworks or libraries are you loading? Any other information you can provide would be helpful. -- Ikai Lan Developer Programs Engineer, Google App Engine On Mar 5, 10:21 pm, Jake <jbrooko...@cast.org> wrote: > Hello all, > > My application has been having very frequent restarts, even under > load. In some cases, the application restarts on every single > request. I've been in contact with some GAE folks, but the most > recent e-mail suggested that I "encourage others to post similar > trends and expose holes in our monitoring." > > So, if you have this problem, please make it known. I'm not talking > about slow startup - I'm talking about frequent restarts. To me, > "frequent" means a restart less than 30 minutes from the previous > request. > > Jake -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
