After further discussion, we've decided to just show WikiGrok to a fraction of users during the test. I currently have it set to show WikiGrok to 10 out of every 62 users or ~16% (the userToken is a base 62 number). That should give us an estimated 27 hits per second. Does that work for everyone?
Kaldari On Thu, Jan 8, 2015 at 2:06 PM, Nuria Ruiz <[email protected]> wrote: > We cannot guarantee that with 60 events a sec things will still work well > (as I said we should schedule some perf testing on this regard so I filed > an item for this purpose: https://phabricator.wikimedia.org/T86244) > > See that now we go beyond 300 events per sec here and there: > http://ibin.co/1nTsNYc1bekd > > I recommend sampling those events 1:10. > > Thanks, > > > Nuria > > On Thu, Jan 8, 2015 at 12:06 PM, Ryan Kaldari <[email protected]> > wrote: > >> After talking with Dario and Leila we decided that we will sample the >> page-impression event at 1:1000. We would, however, like to retain the >> widget-impression event unsampled if possible. That event happens >> approximately 50% as often as page-impression. So we're probably talking >> about somewhere around 60 events per second in that case. Would that be >> acceptable or should we sample the widget-impression event as well? >> >> Kaldari >> >> On Wed, Jan 7, 2015 at 5:33 PM, Leila Zia <[email protected]> wrote: >> >>> Thanks, Nuria! >>> >>> On Wed, Jan 7, 2015 at 5:30 PM, Ryan Kaldari <[email protected]> >>> wrote: >>> >>>> Thanks everyone for the research on this! I'll go ahead and create a >>>> card for implementing sampling on the high-throughput WikiGrok events. >>>> >>>> Kaldari >>>> >>>> On Wed, Jan 7, 2015 at 5:20 PM, Nuria Ruiz <[email protected]> wrote: >>>> >>>>> Sorry, I send it too soon, trying again: >>>>> >>>>> >We're talking about a total of ~170 events per sec for these pages. >>>>> This is to high to log in 1:1 rate, we would need to do 1:10. At this >>>>> time most events on EL logging log at a much lower rate, events over 1 per >>>>> sec are the following, as you can see mobile & media viewer are the >>>>> majority of the throughput. >>>>> >>>>> My preference would be to be less than 400 events per sec until we >>>>> have done some perf testing to make sure we can handle it (we might be >>>>> able >>>>> to as we have done many improvements since we set these thresholds) >>>>> >>>>> MobileWebClickTracking 41.35% (114.15/sec) >>>>> MediaViewer 21.66% (59.78/sec) >>>>> MobileWikiAppToCInteraction 12.44% (34.35/sec) >>>>> PageContentSaveComplete 3.39% (9.35/sec) >>>>> EchoInteraction 2.69% (7.42/sec) >>>>> NavigationTiming 2.51% (6.93/sec) >>>>> MultimediaViewerNetworkPerformance 1.84% (5.07/sec) >>>>> SaveTiming 1.58% (4.37/sec) >>>>> Edit 1.39% (3.83/sec) >>>>> PersonalBar 1.24% (3.43/sec) >>>>> TimingData 0.83% (2.28/sec) >>>>> MobileWebUIClickTracking 0.73% (2.02/sec) >>>>> Popups 0.68% (1.87/sec) >>>>> MobileWikiAppOnboarding 0.62% (1.70/sec) >>>>> MultimediaViewerDimensions 0.61% (1.68/sec) >>>>> UniversalLanguageSelector 0.50% (1.37/sec) >>>>> PageCreation 0.50% (1.37/sec) >>>>> MultimediaViewerDuration 0.47% (1.30/sec) >>>>> MobileWebEditing 0.45% (1.25/sec) >>>>> MobileWikiAppSearch 0.41% (1.13/sec) >>>>> CentralAuth 0.40% (1.12/sec) >>>>> >>>>> On Wed, Jan 7, 2015 at 5:12 PM, Nuria Ruiz <[email protected]> >>>>> wrote: >>>>> >>>>>> >We're talking about a total of ~170 events per sec for these pages. >>>>>> This is to high to log in 1:1 rate, we would need to do 1:10. >>>>>> >>>>>> On Wed, Jan 7, 2015 at 4:10 PM, Leila Zia <[email protected]> >>>>>> wrote: >>>>>> >>>>>>> Thanks everyone for chiming in. Your comments were very helpful. :-) >>>>>>> >>>>>>> Nuria, I checked the per second pageview count for the pages >>>>>>> wikigrok will be live on for 3 hours in 2015-01-07 (as a sample). We're >>>>>>> talking about a total of ~170 events per sec for these pages. Of course >>>>>>> major events can affect this number. This number added to the current >>>>>>> 270 >>>>>>> events per sec you mentioned will send us over the 350 events per sec >>>>>>> limit >>>>>>> (if it's a hard limit). What do you think? >>>>>>> >>>>>>> Leila >>>>>>> >>>>>>> >>>>>>> >>>>>>> On Wed, Jan 7, 2015 at 10:13 AM, Nuria Ruiz <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>>> >Given that information, do you have any idea if we are in danger >>>>>>>> of overloading EventLogging? >>>>>>>> Logging broad events (such a page load) 1 to 1 might incur into >>>>>>>> problems as our traffic is high enough that events logged1/1000 happen >>>>>>>> still in very large amounts. >>>>>>>> >>>>>>>> Some numbers (oversimplyfying and rounding) >>>>>>>> >>>>>>>> We have about 200 million visits per day for the enwiki mobile site >>>>>>>> . This means about 2300 pageviews per sec, if we are sending 1 load >>>>>>>> event >>>>>>>> per pageview EL will (sadly) die, most likely. >>>>>>>> >>>>>>>> If we assume EL handles up to 350 events per second (and now we are >>>>>>>> at 270 events per sec) I would think that sending 10 events per sec on >>>>>>>> your >>>>>>>> case would be pretty safe. That would be sampling about 1/200 for a >>>>>>>> load >>>>>>>> event per every pageview. This seems like a good upper bound. >>>>>>>> >>>>>>>> Now, since there are no constrains as to how long you keep your >>>>>>>> experiment running you can try a lower sampling ratio, say, 1/1000 and >>>>>>>> keep >>>>>>>> the experiment running for longer. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> On Tue, Jan 6, 2015 at 5:50 PM, Ryan Kaldari < >>>>>>>> [email protected]> wrote: >>>>>>>> >>>>>>>>> The highest volume events we are going to log will be: >>>>>>>>> 1. For each of the 166,000 articles, one event when the page loads >>>>>>>>> 2. For each of the 166,000 articles, one event when the WikiGrok >>>>>>>>> widget enters the viewport (about half as often as #1) >>>>>>>>> >>>>>>>>> These will be active for all mobile users, logged in and logged >>>>>>>>> out, including many high pageview articles. >>>>>>>>> >>>>>>>>> Given that information, do you have any idea if we are in danger >>>>>>>>> of overloading EventLogging? If so, do you have recommendations on >>>>>>>>> sampling? So far, everyone has said not to worry about it, but it >>>>>>>>> would be >>>>>>>>> good to get a sanity check for this test specifically. >>>>>>>>> >>>>>>>>> Kaldari >>>>>>>>> >>>>>>>>> On Tue, Jan 6, 2015 at 4:57 PM, Nuria Ruiz <[email protected]> >>>>>>>>> wrote: >>>>>>>>> >>>>>>>>>> (cc-ing mobile-tech) >>>>>>>>>> >>>>>>>>>> Since we do not the details of how wikigrok is used and its >>>>>>>>>> throughput of requests we can not "estimate" sampling ourselves. I >>>>>>>>>> imagine >>>>>>>>>> wikigrok is been deployed to a number of users and it is with that >>>>>>>>>> usage >>>>>>>>>> the mobile team could estimate the total throughput expected, with >>>>>>>>>> this >>>>>>>>>> throughput we can recommend sampling ratios. >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> Thanks for asking about this without before deploying! >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> On Tue, Jan 6, 2015 at 4:55 PM, Ryan Kaldari < >>>>>>>>>> [email protected]> wrote: >>>>>>>>>> >>>>>>>>>>> I can elaborate on this after I finished the SWAT deployment.... >>>>>>>>>>> Gimme 30 minutes or so. >>>>>>>>>>> >>>>>>>>>>> On Tue, Jan 6, 2015 at 4:51 PM, Leila Zia <[email protected]> >>>>>>>>>>> wrote: >>>>>>>>>>> >>>>>>>>>>>> Hi, >>>>>>>>>>>> >>>>>>>>>>>> The mobile team is planning to switch WikiGrok on for >>>>>>>>>>>> non-logged in users next week (2014-01-12). The widget will be on >>>>>>>>>>>> on >>>>>>>>>>>> 166,029 article pages in enwiki. There are two EventLogging schema >>>>>>>>>>>> that may >>>>>>>>>>>> collect data heavily and we want to make sure EL can handle the >>>>>>>>>>>> influx of >>>>>>>>>>>> data. >>>>>>>>>>>> >>>>>>>>>>>> The two schema collecting data are: >>>>>>>>>>>> https://meta.wikimedia.org/wiki/Schema:MobileWebWikiGrok >>>>>>>>>>>> https://meta.wikimedia.org/wiki/Schema:MobileWebWikiGrokError >>>>>>>>>>>> and the list of pages affected is in: >>>>>>>>>>>> wgq_page in enwiki.wikigrok_questions. >>>>>>>>>>>> >>>>>>>>>>>> It would be great if someone from the dev side let us know >>>>>>>>>>>> whether we will need sampling. >>>>>>>>>>>> >>>>>>>>>>>> Thanks, >>>>>>>>>>>> Leila >>>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>>> _______________________________________________ >>>>>>>>>>> Analytics mailing list >>>>>>>>>>> [email protected] >>>>>>>>>>> https://lists.wikimedia.org/mailman/listinfo/analytics >>>>>>>>>>> >>>>>>>>>>> >>>>>>>>>> >>>>>>>>>> _______________________________________________ >>>>>>>>>> Analytics mailing list >>>>>>>>>> [email protected] >>>>>>>>>> https://lists.wikimedia.org/mailman/listinfo/analytics >>>>>>>>>> >>>>>>>>>> >>>>>>>>> >>>>>>>>> _______________________________________________ >>>>>>>>> Analytics mailing list >>>>>>>>> [email protected] >>>>>>>>> https://lists.wikimedia.org/mailman/listinfo/analytics >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> Analytics mailing list >>>>>>>> [email protected] >>>>>>>> https://lists.wikimedia.org/mailman/listinfo/analytics >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> Analytics mailing list >>>>>>> [email protected] >>>>>>> https://lists.wikimedia.org/mailman/listinfo/analytics >>>>>>> >>>>>>> >>>>>> >>>>> >>>>> _______________________________________________ >>>>> Analytics mailing list >>>>> [email protected] >>>>> https://lists.wikimedia.org/mailman/listinfo/analytics >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> Analytics mailing list >>>> [email protected] >>>> https://lists.wikimedia.org/mailman/listinfo/analytics >>>> >>>> >>> >>> _______________________________________________ >>> Analytics mailing list >>> [email protected] >>> https://lists.wikimedia.org/mailman/listinfo/analytics >>> >>> >> >> _______________________________________________ >> Analytics mailing list >> [email protected] >> https://lists.wikimedia.org/mailman/listinfo/analytics >> >> > > _______________________________________________ > Analytics mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/analytics > >
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