Hey Deepak, Could you reupload those attached images? I can't see them from my end. As well, a few more example logs would help to determine what might be going on.
Cheers, Nick Cloud Platform Community Support On Wednesday, August 3, 2016 at 12:39:22 PM UTC-4, Deepak Singh wrote: > > Hi Nick, > > Thanks for your detailed response. > Based on your response, i guess that none of the data seems suspicious in > our logs. Here is a log snippet > ms=214 cpu_ms=0 cpm_usd=0.00002771493 loading_request=0 instance=- > app_engine_release=1.9.42 trace_id=c0ed6d9452c7fa778840af791c4a291d > > However look at the below graphs where latency shows the data and cpu > graph shows the enough instance. But still we have user latency. > > Google page speed test indicates server response time as close to 0.5 sec > which is quite high. > > > > > > CPU > % CPU > 3 Aug, 12:003 Aug, 15:003 Aug, 18:003 Aug, 22:025101520 > > Latency > Milliseconds > 3 Aug, 12:003 Aug, 15:003 Aug, 18:003 Aug, > 21:5920,00040,00060,00080,000100,000120,000 > Average request latency: > > On Wed, Aug 3, 2016 at 12:58 AM, 'Nick (Cloud Platform Support)' via > Google App Engine <google-appengine@googlegroups.com> wrote: > >> Hey Deepak, >> >> This means this was not the first request to the instance. This means >> that most of your requests are being handled by instances which already >> existed when the request was received by the App Engine front-end load >> balancer. >> >> If you are still seeing latency, this could be caused by the instances >> being overloaded and the requests waiting in the pending queue in front of >> the instance (you can read about pending queues >> <https://cloud.google.com/appengine/docs/python/glossary#pending_request_queue> >> >> and scaling parameters in the app.yaml documentation >> <https://cloud.google.com/appengine/docs/python/config/appref?authuser=1#scaling_elements> >> >> (if using Java, see the appengine-web.xml documentation >> <https://cloud.google.com/appengine/docs/java/config/appref#scaling_elements> >> >> which is analogous)). In that case, you'll see another field, "pending_ms" >> in the log line. You can solve this type of latency by changing the scaling >> settings (see the docs). >> >> If you don't see very high values for "pending_ms", check whether >> "cpu_ms" is comparable to the total request latency, as this could mean >> that your instance is taking a large amount of time to process the request. >> >> If the "ms" field is high but the "cpu_ms" is not high, this could mean >> that a remote API call made during handling the request takes a long time >> to complete while the instance waits for it to return before sending the >> response. >> >> Finally, if the "ms" field is not high compared to what the client >> observes, it's possible that the extra time is added during network >> transfer to and from the App Engine infrastructure and your instance. This >> could be solved by improving the network the client is on (not always a >> possibility) or locating the app closer to them (create an EU application >> if clients are in Europe). >> >> You can read more about request log fields in the documentation >> <https://cloud.google.com/appengine/docs/python/logs/#understanding_request_log_fields> >> . >> >> I hope this short guide is helpful in determining the cause of the >> request latency. If you have any further questions, let me know and I'll be >> happy to assist! >> >> Cheers, >> >> Nick >> Cloud Platform Community Support >> >> >> On Friday, July 29, 2016 at 12:01:29 PM UTC-4, Deepak Singh wrote: >>> >>> I see almost all of my request logs has loading_request=0 >>> >>> We know that this is only present if the request causes the instance to >>> be started, so what should i understand based on this? our app faces high >>> latency most of the time. >>> >>> Java, flexible env based app. >>> >>> -- >>> Tech >>> >> -- >> 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 google-appengine+unsubscr...@googlegroups.com. >> To post to this group, send email to google-appengine@googlegroups.com. >> Visit this group at https://groups.google.com/group/google-appengine. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/google-appengine/301897c2-16ac-4d30-ad84-7f19e7a2d870%40googlegroups.com >> >> <https://groups.google.com/d/msgid/google-appengine/301897c2-16ac-4d30-ad84-7f19e7a2d870%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Deepak Singh > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. 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