Hi, You've got a lot of info there. I tried to skim it, but might have missed some stuff.
In your experiments with multiple backends, they are all the same "backend" right? You're not targeting specific instances are you? In other words, is everything targeted at "thebackend," "1.thebackend," or multiple different backends? Do you see pending latencies in the request log headers? That's where the failfast header should help. Rather than dispatch the task, then wait for an instance to handle it, it will immediately get returned to the queue. I don't think it is intended to prevent instances from being spun up. What happens if instead of backends you use front ends plus a max_concurrent_requests equal to the number of backends you were wanting? Does it change the behavior you're seeing? You does the latency of the request itself impact what you're seeing? If you do a lot more work in each request does the situation improve? Robert On Sun, Jan 29, 2012 at 11:56, pdknsk <pdk...@googlemail.com> wrote: > > I haven't tried setting countdown. It's too slow for the mail queue > anyway. It might work on the other backend (mentioned in the bug). > I've moved most code away from backends though. > > *- After first minute of the batch run, Task Queue Details page > > consistently shows 6-8 tasks run in last minute even though logs show only > > 2-3 requests served per minute (no errors or anything abnormal shown in the > > logs either). I know for certain the only tasks running in the queue in > > question are from my tests. Why is the number overstated, and why does it > > only happen in the single-instance configuration?* > > I've noticed sth. else, with might be related. When you stop a > backend, and put tasks on it, the tasks will obviously not run. In the > task queue overview in the dashboard however, tasks are reported to > have run in the last minute. > > -- > 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.
