Keeping steady HTTP traffic does not work either. I have a script which 'http pings' my application every 30 seconds. Yet my app-engine instance experienced 70 spin downs yesterday alone!
I am REALLY looking to this update - until then I'd highly recommend staying away from Spring! On Oct 21, 6:59 pm, "Jason (Google)" <[email protected]> wrote: > Aside from keeping steady HTTP traffic to your site, I'm afraid not. But as > I wrote in my last post, we're making updates over the next few releases to > drive this startup time lower. > > - Jason > > On Tue, Oct 20, 2009 at 2:06 AM, Marcel Overdijk > <[email protected]>wrote: > > > > > Is there any other way to keep an instance "warm"? > > > Startup of instance just takes to much time to have an effective GAE/J > > application... > > > On 19 okt, 22:58, "Jason (Google)" <[email protected]> wrote: > > > To answer your question, no, having a cron job run every minute to keep > > an > > > instance warm will not work. If all application instances have spun down, > > > then a fresh HTTP request will require a new instance to be created, > > which > > > will incur the startup costs. > > > > - Jason > > > > On Fri, Oct 16, 2009 at 6:45 AM, Toby <[email protected]> > > wrote: > > > > > That is an interesting thread. I was asking myself the same question. > > > > My problem is, that I have some expensive initialization that is done > > > > when the webapp is initialized. I recognized that the very first > > > > request (after a longer time of idle) takes a lot of time. And as you > > > > say is expensive. > > > > I wonder if it would make sense to have a cron job that runs every > > > > minute to prevent this? > > > > > On Oct 15, 10:52 pm, Timwillhack <[email protected]> wrote: > > > > > I should probably point out that when I say 'Timed out' I really > > mean, > > > > > clean start after waiting say 10 minutes to refresh a page, its not a > > > > > 30 second endless while loop or anything, its actually just > > outputting > > > > > one character from a string array. > > > > > > On Oct 15, 2:46 pm, Timwillhack <[email protected]> wrote: > > > > > > > I was just curious if the initialization of the Java VM is actually > > > > > > charged a client? Here are some sample headers from Java vs. > > Python > > > > > > after letting the server timeout: > > > > > > > VERY EXPENSIVE JAVA (timed out - guessing restarting VM): > > > > > > X-AppEngine-Estimated-CPM-US-Dollars: $0.149171 > > > > > > X-AppEngine-Resource-Usage: ms=4152 cpu_ms=6440 api_cpu_ms=0 > > > > > > > X-AppEngine-Estimated-CPM-US-Dollars: $0.145377 > > > > > > X-AppEngine-Resource-Usage: ms=3890 cpu_ms=6276 api_cpu_ms=0 > > > > > > > Cheap JAVA (quick refresh): > > > > > > X-AppEngine-Estimated-CPM-US-Dollars: $0.000168 > > > > > > X-AppEngine-Resource-Usage: ms=41 cpu_ms=3 api_cpu_ms=0 > > > > > > > X-AppEngine-Estimated-CPM-US-Dollars: $0.000189 > > > > > > X-AppEngine-Resource-Usage: ms=19 cpu_ms=4 api_cpu_ms=0 > > > > > > > CHEAP PYTHON FRESH START (waited about 10 mins before connecting): > > > > > > X-AppEngine-Estimated-CPM-US-Dollars: $0.002778 > > > > > > X-AppEngine-Resource-Usage: ms=103 cpu_ms=116 api_cpu_ms=0 > > > > > > > X-AppEngine-Estimated-CPM-US-Dollars: $0.002778 > > > > > > X-AppEngine-Resource-Usage: ms=106 cpu_ms=116 api_cpu_ms=0 > > > > > > > PYTHON RECONNECT QUICKLY: > > > > > > X-AppEngine-Estimated-CPM-US-Dollars: $0.000231 > > > > > > X-AppEngine-Resource-Usage: ms=7 cpu_ms=6 api_cpu_ms=0 > > > > > > > Python is reporting very very very cheaper pricing per 1000. Is > > this > > > > > > the case or does google not really charge for the initialization > > for > > > > > > java? I sat here refreshing a page with a friend doing the same, > > out > > > > > > of the 40 or so requests about 4 were skyrocketed in price. This > > > > > > makes me very wary about making something that is hit excessively, > > > > > > since it seems like each instance is only taking 10 requests each > > per > > > > > > minute or whatver.... > > > > > > > Yuck, are my numbers flawed or something? Or is Python just so > > much > > > > > > more efficient to use on app engine? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~----------~----~----~----~------~----~------~--~---
