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 > >
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