Hi Carl, What does your instances graph look like? Can you provide a screencap?
What I'm wondering is if for extremely low traffic apps there is no way to keep Total instances from sometimes exceeding Billed instances (and hence giving users loading requests). /Tom On Jan 18, 1:21 pm, Carl Schroeder <schroeder.car...@gmail.com> wrote: > 2 Resident instances. App was quiet for 10 minutes, no requests being > served. 1 request sent. Neither resident instance took it. A cold instance > was started without using /ah_/warmup. That user facing request languished > for 30 seconds while GAE java spun up. There seems to be no way to prevent > these sorts of catastrophes from happening. > > App ID = lemurspot > Instance ID = 00c61b117cb19763aeea814cbc78e80de2f437 > > > > > > > > On Friday, January 18, 2013 10:10:25 AM UTC-8, Carl Schroeder wrote: > > > There needs to be a checkbox on the dashboard which says "never send user > > request to cold instances". Then low traffic apps (or versions) with low > > latency handlers will no longer be at the mercy of a load balancing > > algorithm making WAGs in an information vacuum. After an app (or version) > > has enough traffic for the instance scheduler to make educated guesses, > > this box can be unchecked. > > > I think that would fix everyone's issues with cold start latency on GAE > > java. > > > On Friday, January 18, 2013 9:22:15 AM UTC-8, Tom Phillips wrote: > > >> Yep, you need more min idles. At some min idle setting you'll see that > >> the blue line no longer goes above green (minus unforeseen bursts, > >> which need be you can prepare for with an even higher min idle > >> setting). > > >> Once blue doesn't go above green, you'll see warmup request going to / > >> _ah/warmup and not to your users. > > >> Basically, you don't get any delta between blue and green for free. > >> You pay for it by having your users suffer loading requests. That's > >> one reason why very low startup latency apps shine - they can take > >> advantage of any delta. Higher startup latency apps (pretty much any > >> real java app) are OK at steady state, but only if you are willing to > >> pay to have a high enough min idle setting that you are billed for all > >> running instances. > > >> /Tom > > >> On Jan 18, 12:07 pm, Francois Masurel <f.masu...@gmail.com> wrote: > >> > Here is my dashboard instance graph. > > >> > First part is with 1 min idle instance, second part with min idle > >> instance > >> > set to auto. > > >> > < > >>https://lh6.googleusercontent.com/-xVIJBwSd04o/UPmA5FfU4QI/AAAAAAAAz5...> > > >> > I have just set min idle instances to 2 and see how it goes. > > >> > François > > >> > On Friday, January 18, 2013 5:11:47 PM UTC+1, Tom Phillips wrote: > > >> > > Hi Francois, > > >> > > Don't set min idles to automatic, set it to a high enough number that > >> > > over time Total instances (blue) == Billed instances (green). Leave > >> > > max idles and the two latency settings at automatic. > > >> > > If you do have min idles configured, can you post a screencap of your > >> > > instances graph? > > >> > > /Tom > > >> > > On Jan 18, 8:45 am, Francois Masurel <f.masu...@gmail.com> wrote: > >> > > > Things are getting worse : 20 loading requests for the last 23 > >> minutes > >> > > > (about 20% of all requests). > > >> > > > Could I have an explanation ? > > >> > > > What am I doing wrong ? I'm really lost :-( > > >> > > > App Id : vncts1 > > >> > > > On Friday, January 18, 2013 2:25:17 PM UTC+1, Francois Masurel > >> wrote: > > >> > > > > I have been testing full automatic mode for the last hours (all > >> > > > > application settings set to automatic). > > >> > > > > Still getting quite a few user-facing loading requests (~20 per > >> hour, > >> > > 5% > >> > > > > of all requests), there is no more warmup requests in the logs. > > >> > > > > One dynamic instance has been alive since the beginning of the > >> test > >> > > and is > >> > > > > getting most of the traffic. > > >> > > > > Are these numbers normal ? > > >> > > > > François > > >> > > > > App Id: vncts1 > > >> > > > > On Thursday, January 17, 2013 11:21:16 PM UTC+1, Francois Masurel > >> > > wrote: > > >> > > > >> Hi Tom, > > >> > > > >> Thanx for your suggestion, that's just the settings I'm testing > >> at > >> > > the > >> > > > >> moment. > > >> > > > >> Seems to reduce significantly user-facing requests but will > >> quite > >> > > > >> increase my bill (x4) :-( > > >> > > > >> May be it will be worth it. > > >> > > > >> I'll tell you how it goes. > > >> > > > >> François > > >> > > > >> On Thursday, January 17, 2013 11:11:56 PM UTC+1, Tom Phillips > >> wrote: > > >> > > > >>> Make sure on your instances graph that the blue "Total" line is > >> not > >> > > > >>> often, ideally only under unforeseen bursts, going higher than > >> the > >> > > > >>> green "Billed" line. > > >> > > > >>> Total(blue) > Billed(green): you aren't charged for the delta > >> > > between > >> > > > >>> Total and Billed, but lower QOS for users (assuming your > >> startup > >> > > time > >> > > > >>> is high) since they get most loading requests. > >> > > > >>> Total(blue) == Billed(green): Your /_ah/warmup gets all loading > >> > > > >>> requests, optimal QOS > > >> > > > >>> This is just what I've observed (leaving max idles and min/max > >> > > latency > >> > > > >>> at automatic). Unless you have magically low startup latency, > >> boost > >> > > > >>> min idles until Total == Billed consistently. > > >> > > > >>> /Tom > > >> > > > >>> On Jan 17, 11:56 am, Francois Masurel <f.masu...@gmail.com> > >> wrote: > >> > > > >>> > For my low traffic website I have found that 50 new instances > >> were > >> > > > >>> started > >> > > > >>> > during the last 2 hours and 22 minutes (taken from logs > >> searching > >> > > for > >> > > > >>> "new > >> > > > >>> > process"). > > >> > > > >>> > Seems quite a lot for me as I already have a resident > >> instance. > > >> > > > >>> > But what annoys me the most is that, among those 50 loading > >> > > requests, > >> > > > >>> 20 > >> > > > >>> > were user-facing requests (40%) and 5 were cron requests > >> (10%). > > >> > > > >>> > Is it normal behavior ? Thanx for your help. > > >> > > > >>> > François -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. 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