On Saturday, January 25, 2014 9:09:02 AM UTC+8, timh wrote: > > Irrespective of what your view of the definition of an idle instance and a > resident instance is, thats not how google see's it. > Resident and Dynamic instances are different. > > In addition > > A resident instance may or may not service a request. > An idle (dynamic) instance (not resident) is most likely to service a new > request. > You may have extra idle (dynamic) instances that are created (due to a > perceived demand) and never service a request. > You are not charged for idle (dynamic) instances above max idle. > > Idle (dynamic) instances are in addition to any resident instance. >
In this docs: https://developers.google.com/appengine/docs/adminconsole/instances it clearly shows *minimum idle instances* is for control the number of *resident instances*: App Engine also offers *resident* instances, which remain running all the time. Resident instances allow you to improve application performance, and, if your application uses backends, allow you to perform longer-running, larger tasks. You can enable resident instances on a backend<https://developers.google.com/appengine/docs/python/backends>, or by setting minimum idle instances<https://developers.google.com/appengine/docs/adminconsole/performancesettings> . So I think idle instance == resident instance. > > Here is a list of instances from a low traffic site > > *Instances *[image: > help]<https://developers.google.com/appengine/docs/adminconsole/instances> > QPS*Latency*RequestsErrorsAgeMemoryApp Engine ReleaseLogsAvailability > Shutdown0.0000.0 ms29502 days, 5:44:0869.8 MBytes1.8.9 > [image: Resident Icon]Resident > 0.050350.7 ms1546016:34:2155.3 MBytes1.8.9 > [image: Dynamic Icon]Dynamic > 0.0000.0 ms5302:37:2470.6 MBytes1.8.9 > [image: Dynamic Icon]Dynamic > > Look at your instances chart to see what you aggregate instance time you > are being billed for. > > If you really want to keep under the 28 hours (I have done it in the past) > (you probably shouldn't use java ;-). > > > - Don't have a reserved instance, set idle instances to one, and run a > external wget every minute or so to keep a single instance alive. > - If new instances take too long to start and another request comes in > during startup, then you will probably find you get another dynamic > instance started. > > T > > T > > On Saturday, January 25, 2014 8:54:52 AM UTC+8, Tapir wrote: >> >> >> >> On Saturday, January 25, 2014 2:06:31 AM UTC+8, Rafael Sanches wrote: >>> >>> that seems correct, >>> >>> You have one idle instance because of this: <max-idle-instances>1</max- >>> idle-instances> >>> >>> You have one resident instance because of this: >>> <min-idle-instances>1</min-idle-instances> >>> >> >>> You have one other instance because that's the one that is actually >>> serving. >>> >>> >>> >> What is the difference between idle instance and resident instance in >> your view? They are different concepts? or the same? >> You think there are only one dynamic instance running? >> (In my view, idle instance and resident instance are the same concept. >> There is only one resident/idle instance there. And there are 2 dynamic >> instances running) >> >> Do you think a dynamic instances opened for hours to handler just 2 >> requests (one is /_ah/warnup) is normal? >> >> >> >> >>> >>> >>> On Fri, Jan 24, 2014 at 8:20 AM, Tapir <[email protected]> wrote: >>> >>>> Evidence: http://imgur.com/VNHdkpU >>>> >>>> Following is the config. >>>> >>>> <?xml version="1.0" encoding="utf-8"?> >>>> <appengine-web-app xmlns="http://appengine.google.com/ns/1.0";> >>>> <application>{{app_id}}</application> >>>> <module>default</module> >>>> <version>{{app_version}}</version> >>>> >>>> <!-- loading faster --> >>>> <precompilation-enabled>true</precompilation-enabled> >>>> >>>> <!-- warmup --> >>>> <warmup-requests-enabled>true</warmup-requests-enabled> >>>> >>>> <!-- concurrentcy --> >>>> <threadsafe>true</threadsafe> >>>> >>>> <!-- concurrentcy --> >>>> <sessions-enabled>true</sessions-enabled> >>>> >>>> <inbound-services> >>>> <service>channel_presence</service> >>>> </inbound-services> >>>> >>>> <!-- scale settings --> >>>> >>>> <instance-class>F1</instance-class> >>>> >>>> <automatic-scaling> >>>> <min-idle-instances>1</min-idle-instances> >>>> <max-idle-instances>1</max-idle-instances> >>>> <min-pending-latency>2730ms</min-pending-latency> >>>> <max-pending-latency>automatic</max-pending-latency> >>>> <max-concurrent-requests>50</max-concurrent-requests> >>>> </automatic-scaling> >>>> >>>> <!-- Configure java.util.logging --> >>>> <system-properties> >>>> <property name="java.util.logging.config.file" >>>> value="WEB-INF/logging.properties"/> >>>> </system-properties> >>>> >>>> <static-files> >>>> <include path="/favicon.ico" /> >>>> <include path="/crossdomain.xml" /> >>>> <include path="/css/**.*" expiration="1d"/> >>>> <include path="/swfs/**.swf" expiration="365d" /> >>>> <include path="/js/**.js" expiration="1d" /> >>>> <include path="/images/**.ico" expiration="1d" /> >>>> <include path="/images/**.png" expiration="1d" /> >>>> <include path="/images/**.gif" expiration="1d" /> >>>> <include path="/images/**.jpg" expiration="1d" /> >>>> <include path="/htmls/**.i*" expiration="1d" /> >>>> </static-files> >>>> >>>> </appengine-web-app> >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Google App Engine" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To post to this group, send email to [email protected]. >>>> Visit this group at http://groups.google.com/group/google-appengine. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>> >>> -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. 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