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
>
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