neat - now I get it. That's a nice hack! Did you find that out from the Google App Engine group, or thought of it yourself?
Richard On Oct 29, 10:29 am, Robin B <robi...@gmail.com> wrote: > > The docs say a task will run when resources are free. In your > > experience do the tasks generally run on time? > > Yes, they are trying to say that task queue webhooks are subject to > the same quota restrictions as your app. > > > Also how would you make a task run periodically? > > This is answered in a previous message in this thread: > > "To keep an app hot, use the task > queue to hit a url that simply returns a non-200 HTTP status code, so > the task will retry indefinitely at up to 10 Hz (10 calls/second), you > can specify how often a task is called." > > Tasks are considered 'completed' and removed if they result in a 200 > HTTP status code. > > > My understanding is > > they are for one off events and cron is for periodic. > > You are right, always returning a non-200 status code is obviously not > the intended purpose of the task queue, but in this situation we are > hacking the task queue to accomplish a specific goal of calling the > task periodically since tasks can run much more frequently than cron > which is necessary to keep a handler 'hot'. > > Robin > > > > > Richard > > > On Oct 28, 11:23 pm, Robin B <robi...@gmail.com> wrote: > > > > Oops typo: I said cron is 1/sec it actually its 1/minute, task queue > > > is 10/second, so cron is not fast enough but task queue is plenty > > > fast. > > > > Robin > > > > On Oct 28, 4:18 am, Richard <richar...@gmail.com> wrote: > > > > > that's really useful - thanks Robin! > > > > > if Python handlers last ~15 seconds then wouldn't cron be fast enough > > > > (at 1/sec)? > > > > Task queue is labelled experimental so I am wary to use it at the > > > > moment. > > > > > Richard > > > > > On Oct 28, 4:13 pm, Robin B <robi...@gmail.com> wrote: > > > > > > > How long does it stay cached? > > > > > > Inactive Python handlers used to last ~1 minute, recently it is closer > > > > > to 15 seconds. > > > > > > Java servlets last longer, over a minute, maybe becuase they are so > > > > > slow to boot (6 seconds +). > > > > > > One of the coming releases is supposed to speed up the cold boot > > > > > times. > > > > > > Cron has a maximum frequency of 1 Hz (1 call/second), so it is no > > > > > longer fast enough to do the job. To keep an app hot, use the task > > > > > queue to hit a url that simply returns a non-200 HTTP status code, so > > > > > the task will retry indefinitely at up to 10 Hz (10 calls/second), you > > > > > can specify how often a task is called. > > > > > > Robin > > > > > > On Oct 27, 9:53 pm, mdipierro <mdipie...@cs.depaul.edu> wrote: > > > > > > > How long does it stay cached? > > > > > > > On Oct 27, 9:26 pm, Thadeus Burgess <thade...@thadeusb.com> wrote: > > > > > > > > run a cron on your local computer to urllib the page ? :) All I > > > > > > > can come up > > > > > > > with. It is just one of the ways GAE works, when a page is no > > > > > > > longer needed, > > > > > > > it kills the processes until their needed again. Had this problem > > > > > > > with > > > > > > > dreamhost before they supported Passenger > > > > > > > > -Thadeus > > > > > > > > On Tue, Oct 27, 2009 at 6:57 PM, mdipierro > > > > > > > <mdipie...@cs.depaul.edu> wrote: > > > > > > > > > I do not know. > > > > > > > > > On Oct 27, 6:51 pm, Richard <richar...@gmail.com> wrote: > > > > > > > > > is it possible to get web2py on GAE as responsive as > > > > > > > > > Slicehost? (See > > > > > > > > > Thadeus' app: surrenderthebooty.thadeusb.com) > > > > > > > > > > On Oct 26, 4:42 pm, Richard <richar...@gmail.com> wrote: > > > > > > > > > > > I noticed my GAE app is slow for the first webpage I load, > > > > > > > > > > but snappy > > > > > > > > > > for subsequent webpages. > > > > > > > > > > So it seems there is a caching issue, which has been > > > > > > > > > > discussed a few > > > > > > > > > > times (courtesy of Google site search): > > > > > > > >http://groups.google.com/group/web2py/browse_thread/thread/329388bec9.... > > > > > > > > .. > > > > > > > > > > > Is there a way to keep the web2py structures cached? > > > > > > > > > > Perhaps a CRON > > > > > > > > > > job to load a page every so often? > > > > > > > > > > > And are there other ways to tune apps on GAE, such as > > > > > > > > > > setting > > > > > > > > > > "migrate=False"? > > > > > > > > > > > thanks, > > > > > > > > > > Richard > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "web2py-users" group. To post to this group, send email to web2py@googlegroups.com To unsubscribe from this group, send email to web2py+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/web2py?hl=en -~----------~----~----~----~------~----~------~--~---
