Hi Nick, thank for the response. I know that the memcache response time is not covered by SLA (at least for best effort, dedicated probably have), however yesterday it was very high indeed. Because I'm using ndb and I'm using the default memcache policy my server were very slow (at a certain time for sure was terribile). Honestly speaking yesterday was the first day we started having such an high load, 20/30 request per seconds (like x 10 in respect to the days before).The front-end tier was F1, probably that servers weren't able to cope with too many concurrent request (module configure to handle up to 10) and the response time couldn't be better. What really surprised me is that there was 10 server up to handle that load (like at most 2 concurrent request at most per server). I'm still investigating about that, potentially there is something wrong in my code. Today I changed the tier to F2 and that (obviously) is much better.
On Friday, July 17, 2015 at 1:24:20 AM UTC+2, Nick (Cloud Platform Support) wrote: > > Hey Cristian, > > This is understandable given that Memcache is shared using datacenter > resources across all apps. It's likely that apps in the same location as > yours also experienced the same latency for that period. You can read > about Memcache in the docs > <https://cloud.google.com/appengine/docs/java/memcache/> to find that > there is not an SLA for response times. It's likely that the response time > was still significantly faster than Datastore, Cloud SQL, your own MySQL > instance, etc., so there's that to keep in mind. > > Usually, if an issue is large enough to violate some SLA, or if many apps > are affected, a status alert will go out at status.cloud.google.com, > although in this case, the latency you saw was not enough to trigger a > detailed issue report. > > If you have any further questions about memcache, feel free to ask, and > also to consult the docs to learn more. > > Regards, > > Nick > > On Thursday, July 16, 2015 at 3:40:31 AM UTC-4, Cristian Marastoni wrote: >> >> My app is experiencing latency problem (up to 5 times). I noticed many >> problem also accessing and writing memcache stuff. >> Are there any issue reported? >> > -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/e4359f13-557c-45b6-b0b7-a1185d8bc8b1%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
