What I've observed is that a specific app may tend to get slower over time as the "cluster" it runs on gets busier.
Eventually an app may get moved to a new "cluster". This may include a few minutes of hard downtime, even for HRD apps. Afterwards performance can be dramatically better. Someone at google may be able to manually move your app if you complain loudly enough, although there's no guarantee the issue won't recur. When it gets really bad all your instances can be totally idle but many requests still block in the scheduler for hundreds of ms (or more) like you seem to be seeing. Adjusting the latency settings doesn't help because the instances aren't the bottleneck. Quite possibly my least favorite part of app engine, although on the whole I still like it a lot. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/qi2Y7GR4xfUJ. 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.
