OK, I guess the smoothing factor explains the tiny differences for services But for chained requests it makes no sense. The metrics report ten more than in log. I will have a look because it's a fine tool for chained requests duration which are not availabe in the stats feature
Thanks Jacques Adrian Crum wrote: > Keep in mind the metrics provide a moving average. Also, there is a > smoothing factor that can affect the value. > > The smoothing factor is important. Let's say you are using a monitoring > tool to monitor a particular request. If that request has a very brief > increase in response time, you don't want to be alerted. Instead, you > want to know when the increase in response time is sustained over a > period of time. So, the smoothing factor helps prevent "false positives" > in a way. > > Another scenario: You have an eCommerce site and you put a metric on the > store's landing page and you configure it with a threshold value and an > alternate view - one that doesn't include a shopping cart. Normally, > customers land on the normal page that includes a shopping cart. But a > new promotion causes customers to swamp the server and the shopping > experience degrades. The metric will smooth the response time values so > the alternate (non-shopping cart) landing page is not offered too soon. > But if the server is swamped for an extended period, then new visitors > will get the alternate page and be able to browse the site without being > able to order anything. As the request load decreases, the metric will > smooth the response times so the alternate landing page is not removed > too soon. When the landing page response time drops below the configured > threshold, all visitors will receive the normal shopping experience. > > -Adrian > > > On 4/19/2013 10:53 AM, Jacques Le Roux wrote: >> Actually r1361725 was also needed for services metrics to work. >> For services I get slightly higher results than in log. >> It's more consistent than for chained requests which are plain false. >> I did not get a chance to look at code yet... >> >> Jacques >> >> Jacques Le Roux wrote: >>> From: "Jacques Le Roux" <jacques.le.r...@les7arts.com> >>>> Thanks Adrian, >>>> >>>> Yes I saw the threshold idea in Java comments >>>> >>>> Looks like an interesting tool >>>> BTW for the other statistics (I never used it), do you know if chained >>>> requests are taken into account? >>> Hi Adrian, >>> >>> I can answer now that chained requests are not taken into account by the >>> Statistics feature. >>> >>> I also noticed something weird in Metrics feature. The total duration of >>> the chained requests and the duration of the initial >>> calling request don't match And when I compare durations in log with those >>> in Metrics I find those in metrics much higher in >>> some cases, and always higher. >>> >>> Do I misinterpret them? Did you use/check this feature for chained requests? >>> >>> Maybe I should wait your wiki page? >>> >>> Thanks >>> >>> Jacques >>> >>> >>>> Still, can you confirm only if 1361722 and 1361724 the only commits? I >>>> guess there is no Jira? >>>> >>>> Jacques >>>> >>>> From: "Adrian Crum" <adrian.c...@sandglass-software.com> >>>>> I will create a Wiki page this weekend. >>>>> >>>>> The metric name can be anything - the example has a URL: prefix to help >>>>> distinguish request metrics from service metrics. You can put anything >>>>> you want there. >>>>> >>>>> The request-map can have an additional <response> element - which will >>>>> direct the servlet to an alternate view if the metric crosses a >>>>> threshold. I think the JavaDocs explain that. >>>>> >>>>> The basic idea is to put metrics in places where you anticipate heavy >>>>> loads or bottlenecks, then use a third-party reporting/monitoring tool >>>>> to read the metrics. >>>>> >>>>> -Adrian >>>>> >>>>> On 4/11/2013 8:36 AM, Jacques Le Roux wrote: >>>>>> Thanks Atul, >>>>>> >>>>>> So you mean you simply need to put a token (like webapp name) before the >>>>>> request name in this metric name? Did you try it >>>>>> with another request? >>>>>> I see it works on trunk demo and OOTB locally. But I can't get it to >>>>>> work on a custom app I have patched, so maybe I miss >>>>>> something I will wait Adrian's answer about that >>>>>> >>>>>> Jacques >>>>>> >>>>>> >>>>>> From: "Atul Vani" <atul.v...@hotwaxmedia.com> >>>>>>> I think that's just the name, to recognize it among list of several >>>>>>> others, when there will be lots of them. A certain convention is used to >>>>>>> specify that it is for URL or any service. Then again same names request >>>>>>> mappings can exist in separate webapps, so a leading appname, in this >>>>>>> case >>>>>>> 'webtools'. It can be changed to anything. >>>>>>> >>>>>>> On Thu, 11 Apr 2013 00:47:26 +0530, Jacques Le Roux >>>>>>> <jacques.le.r...@les7arts.com> wrote: >>>>>>> >>>>>>>> Hi Adrian, >>>>>>>> >>>>>>>> Let me know if you will, else I might do it... >>>>>>>> >>>>>>>> BTW, are 1361722 and 1361724 the only commit? Is there a Jira? >>>>>>>> >>>>>>>> Could you explain just a bit more the request syntax, sorry but the >>>>>>>> OOTB >>>>>>>> example is a bit confusing. >>>>>>>> >>>>>>>> + <request-map uri="ViewMetrics"> >>>>>>>> + <security https="true" auth="true"/> >>>>>>>> + <metric name="URL: webtools/ViewMetrics" /><!-- Here for >>>>>>>> demonstration --> >>>>>>>> + <response name="success" type="view" value="ViewMetrics"/> >>>>>>>> + </request-map> >>>>>>>> >>>>>>>> What would it be for another than ViewMetrics? >>>>>>>> I mean why "URL: webtools/ViewMetrics"? >>>>>>>> >>>>>>>> Thanks >>>>>>>> >>>>>>>> Jacques >>>>>>>> >>>>>>>> >>>>>>>> From: "Jacques Le Roux" <jacques.le.r...@les7arts.com> >>>>>>>>> Great, thanks Adrian! >>>>>>>>> >>>>>>>>> Maybe a wiki page using http://markmail.org/message/x4lzvda66ju6gdg5 >>>>>>>>> would help to remember the commands? >>>>>>>>> >>>>>>>>> Jacques >>>>>>>>> >>>>>>>>> From: "Adrian Crum" <adrian.c...@sandglass-software.com> >>>>>>>>>> On 4/7/2013 6:38 PM, Adrian Crum wrote: >>>>>>>>>>> On 4/7/2013 12:11 PM, Jacques Le Roux wrote: >>>>>>>>>>>> Jacques Le Roux wrote: >>>>>>>>>>>>> From: "Adrian Crum" <adrian.c...@sandglass-software.com> >>>>>>>>>>>>>> Have you considered using the metrics feature? >>>>>>>>>>>>> Ha forgot to ask about it, now I see and remember this thread and >>>>>>>>>>>>> I >>>>>>>>>>>>> will digg in http://markmail.org/message/x4lzvda66ju6gdg5 >>>>>>>>>>>>> >>>>>>>>>>>>> Of course, I'd not be against a brief briefing, or a link to >>>>>>>>>>>>> explain. >>>>>>>>>>>> What I mostly miss is where are the metrics in webtools? >>>>>>>>>>> Oops, I forgot to commit that part. I will take care of it. >>>>>>>>>>> >>>>>>>>>> Actually, I did commit it: >>>>>>>>>> >>>>>>>>>> https://localhost:8443/webtools/control/ViewMetrics >>>>>>>>>> >>>>>>>>>> -Adrian >>>>>>>>>> >>>>>>>>>> >>>>>>> -- >>>>>>> Using Opera's revolutionary email client: http://www.opera.com/mail/
