I'm hoping its not too late to revive this thread. I still don't understand. Specifically, in java, what happens when my instance memory usage surpasses an instance limit. I'm running F1 and my instances tend to settle around 160MB, sometimes a little higher. Do they simply sit there and not get sent any requests? Are they shut down - doesn't seem to be the case. If they still serve requests what is the incentive for upgrading instances?
thanks for any help, On Wednesday, December 14, 2011 7:31:36 PM UTC+1, Jon McAlister wrote: > > Yes, F1 is what all frontend instances were using prior to the 1.6.1 > release. > > Scott, the issue with your instances dashboard is that our accounting > and enforcement of java memory is different than for python, and this > implementation detail is "bleeding through the interface" here. > > Specifically, for java, the memory limit > ( > http://code.google.com/appengine/docs/java/config/backends.html#Instance_Classes > ) > is what we use as the jvm heap size. However, here the admin console > is listing the process memory usage. These two are not the same thing. > The java process size is usually higher than the jvm heap size, but > usually by a small and relatively stable amount (e.g. 10%). So, in > this case, the jvm heap size is 128MB, and the process size is larger > (and that is what is listed on the page). When you choose a larger > instance class, new instances will be configured with larger jvm heap > sizes. > > On Wed, Dec 14, 2011 at 12:03 AM, Per <per.fragem...@gmail.com> wrote: > > I'm confused by these changes too. Although I'm happy to have choice > > (pay more for more speed sounds awesome) this leaves an odd > > aftertaste After all the communication issues around the recent > > pricing changes, shouldn't it be quite obvious that people will ask > > you about the details anyway? Wouldn't it help to spend a couple > > minutes upfront, explaining this change/new feature better? Surely you > > have spent many hours working on the implementation, why not share > > some additional insight? > > > > "By default, all applications use the basic frontend instance setting > > of 128MB memory and 600MHz CPU." > > > > So, if F1 is what we've been using the past months, why don't you just > > say so. And if it happened to be F2, then people will find out > > eventually, and you should say to too. > > > > I can see a mysterious drop in performance of my application since the > > 22nd of November. I have not analysed it yet (it only occurred to me > > now, since I was busy), but it would help a lot if you'd take the > > guesswork out of these announcements -- because otherwise I am > > somewhat tempted to believe that we've been on something similar to F2 > > and will now have to pay more to achieve the same old performance. > > Please tell me it's not like this, and I'll shut up instantly :) > > > > Cheers, > > Per > > > > > > > > On Dec 14, 12:03 pm, Scott Murphy <sc...@pixoto.com> wrote: > >> Hi, I am confused. Did the default used to be F2? All my instances > run > > >> 128MB of ram. How is this possible? Does this mean that part of the > memory > >> is swapped to disk? If I choose a larger instance class say (F4), will > my > >> Java Heap size automatically change to allow up to 512MB heap? Or is > this > >> extra memory not usable by the app? > >> > >> 0.0000.0 ms108112:44:46170.1 MBytes[image: Resident > Icon]Resident0.0000.0 ms > >> 27701 day, 21:07:27190.0 MBytes[image: Resident > Icon]Resident0.0171905.0 ms > >> 14101 day, 5:35:31182.7 MBytes[image: Resident Icon]Resident0.4331114.4 > ms > >> 402102:49:43239.3 MBytes[image: Dynamic Icon]Dynamic0.0000.0 > ms109701:00:15203.4 > >> MBytes[image: Dynamic Icon]Dynamic0.0000.0 ms12500:12:01197.4 > MBytes[image: > >> Dynamic Icon]Dynamic0.2331295.7 ms48500:22:12192.7 MBytes[image: Dynamic > >> Icon]Dynamic0.4671081.0 ms696734:08:09245.1 MBytes[image: Dynamic Icon] > >> Dynamic0.3831486.6 ms367314:03:36243.4 MBytes[image: Dynamic > Icon]Dynamic > >> 0.0000.0 ms641304:15:35243.5 MBytes[image: Dynamic > Icon]Dynamic0.0503124.3 > >> ms600:02:07149.5 MBytes[image: Dynamic Icon]Dynamic0.05030326.0 > ms200:00:40136.2 > >> MBytes[image: Dynamic Icon]Dynamic0.5671189.9 ms551503:33:30244.8 > MBytes[image: > >> Dynamic Icon]Dynamic > > > > -- > > 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 view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/FVYYa-MKn0AJ. 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.
