Completely agree. I am in the process of setting up a direct connection to Tomcat bypassing load balancer. Will give an update soon.
Szymon On 28 November 2016 at 13:40, André Warnier (tomcat) <a...@ice-sa.com> wrote: > On 28.11.2016 14:10, Szymon Czaja wrote: > >> I will run a test in the meantime to check but this is very much unlikely, >> I can see on the Amazon console that the load balancer CPU is hardly doing >> anything with peaks at 2%. Let's assume load balancer is not an issue. >> > > I am not saying that the proxy cannot handle it. But maybe it is limiting > the number of connections that it forwards, if they are all coming from the > same client IP ? > (Avoid DoS attacks, that kind of thing..) > Still a guess. But netstat on both sides may be telling you more. > > If it is tomcat that could not handle the load, then you'd probably still > see the same number of connections on the tomcat server side, at the TCP > level. > That tomcat would be able to "service" these connections is another > matter, but the connections themselves should be there. > > > >> Szymon >> >> On 28 November 2016 at 12:29, André Warnier (tomcat) <a...@ice-sa.com> >> wrote: >> >> On 28.11.2016 12:52, Szymon Czaja wrote: >>> >>> Hi, >>>> I have updated my question on SO. I have noticed that the number of >>>> ESTABLISHED connections goes up on the client after few minutes. I >>>> expected >>>> the same on the server which does not seem to be the case. Any ideas? >>>> >>>> >>> Just a guess without looking very deep into your data : you say somewhere >>> that the requests go through a proxy. Maybe the client "established" TCP >>> connections are with that proxy, while the ones you see on the tomcat >>> server are the connections from the proxy ? >>> (In other words, it is the proxy that is the bottleneck ?) >>> >>> >>> >>> >>> Szymon >>>> >>>> On 28 November 2016 at 10:05, Mark Thomas <ma...@apache.org> wrote: >>>> >>>> On 28/11/2016 09:53, Szymon Czaja wrote: >>>> >>>>> >>>>> Hi, >>>>>> I have asked the question on StackOverflow but I am not getting much >>>>>> response: >>>>>> >>>>>> http://stackoverflow.com/questions/40793335/why-tomcat- >>>>>> does-not-pass-a-tsung-performance-test-at-40-requests-per-second >>>>>> >>>>>> Could anyone help me understand why is Tomcat unable to keep up with >>>>>> the >>>>>> processing when running Tsung yet Apache Bench tests do not relveal >>>>>> any >>>>>> scalability issues? >>>>>> >>>>>> >>>>> I'd recommend taking some thread dumps and looking at netstat output to >>>>> try and figure out what is going on. >>>>> >>>>> Mark >>>>> >>>>> >>>>> --------------------------------------------------------------------- >>>>> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >>>>> For additional commands, e-mail: users-h...@tomcat.apache.org >>>>> >>>>> >>>>> >>>>> >>>> >>> --------------------------------------------------------------------- >>> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org >>> For additional commands, e-mail: users-h...@tomcat.apache.org >>> >>> >>> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
