That one looks much more interesting. I'm too tired right now, but I'll look at it tomorrow.
On Wed, Apr 13, 2011 at 11:50 AM, Dario Rexin <dario.re...@xing.com> wrote: > Hi Tobias, > > I was already sending requests to the server in the last dump. Here is > another, hopefully this one is more helpful. The longer I request data, the > longer it takes for the server to answer. After some time it frequently > freezes for up to several seconds without answering to any of the requests. > > https://gist.github.com/917283 > > Cheers, > > Dario > > Am 13.04.11 11:14 schrieb "Tobias Ivarsson" unter > <tobias.ivars...@neotechnology.com>: > > > Hi Dario, > > > > This dump looks perfectly fine, the expected threads are there, but they > are > > all idle waiting for work. > > > > When I asked for a thread dump, I wanted one from when the server was > under > > load and you experienced problems. Sorry for not being clear about that. > > > > Cheers, > > Tobias > > > > On Wed, Apr 13, 2011 at 10:34 AM, Dario Rexin <dario.re...@xing.com> > wrote: > > > >> Hey, > >> > >> Somehow my attached files always get deleted. Heres the dump: > >> > >> https://gist.github.com/917199 > >> > >> > >> Cheers, > >> > >> Dario > >> > >> Am 13.04.11 10:30 schrieb "Dario Rexin" unter <dario.re...@xing.com>: > >> > >>> Hi Tobias, > >>> > >>> Here's the thread dump you asked for. Thank you for taking a look at > >> this. > >>> > >>> > >>> Cheers, > >>> > >>> Dario > >>> > >>> > >>> Am 12.04.11 22:16 schrieb "Tobias Ivarsson" unter > >>> <tobias.ivars...@neotechnology.com>: > >>> > >>>> Hi Dario, > >>>> > >>>> Looking at that picture it is indeed clear that a number of threads > are > >>>> waiting for something. What is not shown is the more important > >> information > >>>> about *what* they are waiting for. I would love to get information > like > >> that > >>>> in order to investigate the cause of the performance problem you are > >> seeing. > >>>> If you could send a thread dump instead of a screenshot that would be > a > >> lot > >>>> more useful, since that would contain information about contention > that > >> I > >>>> could actually analyze. The easiest way to get a thread dump is by > >> sending > >>>> the SIGQUIT signal (kill -3) to the JVM process running Neo4j. > >>>> > >>>> Cheers, > >>>> Tobias > >>>> > >>>> On Tue, Apr 12, 2011 at 6:35 PM, Dario Rexin <dario.re...@xing.com> > >> wrote: > >>>> > >>>>> Hi all, > >>>>> > >>>>> Due to huge performance issues with some of our neo queries I > profiled > >> my > >>>>> calls on the neo server. The profiling shows, that up to 85% of the > >> time the > >>>>> threads are waiting for other threads. I don¹t understand what¹s > going > >> on > >>>>> there. Hopefully someone with a deeper knowledge can help me. Am I > >> doing > >>>>> something wrong, or is it normal, that most of the time the threads > are > >>>>> blocking each other? Her is a screenshot, showing the results of my > >>>>> profiling: http://i.imgur.com/eIfam.jpg > >>>>> > >>>>> > >>>>> Thanks in advice, > >>>>> > >>>>> Dario > >>>>> _______________________________________________ > >>>>> Neo4j mailing list > >>>>> User@lists.neo4j.org > >>>>> https://lists.neo4j.org/mailman/listinfo/user > >>>>> > >>>> > >>>> > >> > >> -- > >> Dario Rexin > >> Junior Manager Engineering > >> dario.re...@xing.com > >> > >> XING AG > >> Gaensemarkt 43, 20354 Hamburg, Germany > >> > >> Commercial Reg. (Registergericht): Amtsgericht Hamburg, HRB 98807 > >> Exec. Board (Vorstand): Dr. Stefan Groß-Selbeck (Vorsitzender), Ingo > Chu, > >> Dr. Helmut Becker, Jens Pape > >> Chairman of the Supervisory Board (Aufsichtsratsvorsitzender): Dr. Neil > >> Sunderland > >> > >> Please join my network on XING: > >> https://www.xing.com/profile/Dario_Rexin > >> > >> This e-mail may contain confidential and/or privileged information. If > you > >> are not the intended recipient (or have received this e-mail in error) > >> please notify the sender immediately and destroy this e-mail. Any > >> unauthorised copying, disclosure or distribution of the material in this > >> e-mail is strictly forbidden and may be unlawful. > >> > >> _______________________________________________ > >> Neo4j mailing list > >> User@lists.neo4j.org > >> https://lists.neo4j.org/mailman/listinfo/user > >> > > > > > > -- > Dario Rexin > Junior Manager Engineering > dario.re...@xing.com > > XING AG > Gaensemarkt 43, 20354 Hamburg, Germany > > Commercial Reg. (Registergericht): Amtsgericht Hamburg, HRB 98807 > Exec. Board (Vorstand): Dr. Stefan Groß-Selbeck (Vorsitzender), Ingo Chu, > Dr. Helmut Becker, Jens Pape > Chairman of the Supervisory Board (Aufsichtsratsvorsitzender): Dr. Neil > Sunderland > > Please join my network on XING: > https://www.xing.com/profile/Dario_Rexin > > This e-mail may contain confidential and/or privileged information. If you > are not the intended recipient (or have received this e-mail in error) > please notify the sender immediately and destroy this e-mail. Any > unauthorised copying, disclosure or distribution of the material in this > e-mail is strictly forbidden and may be unlawful. > > _______________________________________________ > Neo4j mailing list > User@lists.neo4j.org > https://lists.neo4j.org/mailman/listinfo/user > -- Tobias Ivarsson <tobias.ivars...@neotechnology.com> Hacker, Neo Technology www.neotechnology.com Cellphone: +46 706 534857 _______________________________________________ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
