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 > -- 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
