OK, thanks. Sending the answers again, maybe they were cut by the mailing list before.
Question: What version of x2goagent resp. nxagent are you using? dpkg -l nx-libs? Answer: dpkg -l nx-libs: no packages found <--- this seems strange? x2goserver-x2goagent 4.1.0.3-0~1708~ubuntu1 amd64 nxagent 2:3.5.99.20-0~20190425 amd64 Question: Can you please run xrestop within such a session and check if there are numbers that are far away from those of a fresh session? Answer: Nothing out of the ordinary there I think. No processes with high memory usage. Question: You probably cannot answer that due to your usage scenario, but anyway: does this also happen when you do not disconnect/reconnect? Answer: I don't know. I started logging the memory usage over time, so when the problem arises next time I can correlate with log events and ask the users what they have been doing at certain times etc. Question: What are you running inside the session?fdasfafad Answer: No real pattern here for good and bad sessions. Matlab, Python/machine learning stuff, NVIDIA CUDA-accelerated machine learning programs etc. Maybe a browser here and there to look up stuff (Firefox). — Johannes Töger Associate Senior Lecturer Cardiac MR Group Department of Clinical Sciences Lund, Clinical Physiology Lund University, Sweden -----Original Message----- From: Ulrich Sibiller <ul...@gmx.de> Sent: Monday, January 20, 2020 15:45 To: Johannes Töger <johannes.to...@med.lu.se> Cc: x2go-user@lists.x2go.org Subject: Re: [X2Go-User] Long-running x2goagent, high memory usage Sorry, I forgot to check, but probably not today. But can you please answer my questions in the meantime? Basically you must replace the x2go binary with a little wrapper that use valgrind to start the original binary with the original arguments. Uli On Mon, Jan 20, 2020 at 2:26 PM Johannes Töger <johannes.to...@med.lu.se> wrote: > > I have now set up a logging of the memory use over time. I hope this will > give some data so we can understand the error. Hopefully I can correlate the > memory use increase with user actions. > > Ulrich, were you able to figure out if x2go can be run with valgrind? > > — > Johannes Töger > > Associate Senior Lecturer > Cardiac MR Group > Department of Clinical Sciences Lund, Clinical Physiology Lund > University, Sweden > > -----Original Message----- > From: x2go-user <x2go-user-boun...@lists.x2go.org> On Behalf Of > Johannes Töger > Sent: Friday, January 17, 2020 16:28 > To: Ulrich Sibiller <ul...@gmx.de> > Cc: x2go-user@lists.x2go.org > Subject: Re: [X2Go-User] Long-running x2goagent, high memory usage > > Thanks for quick reply. > > Answers to your questions below. I hope it gives some clue. Please let me > know what else I can try. > > > > What version of x2goagent resp. nxagent are you using? dpkg -l nx-libs? > > dpkg -l nx-libs: no packages found <--- this seems strange? > > x2goserver-x2goagent 4.1.0.3-0~1708~ubuntu1 amd64 > nxagent 2:3.5.99.20-0~20190425 amd64 > > Can you please run xrestop within such a session and check if there are > numbers that are far away from those of a fresh session? > > Nothing out of the ordinary there I think. No processes with high > memory usage. > > You probably cannot answer that due to your usage scenario, but > anyway: does this also happen when you do not disconnect/reconnect? > > I'll try to think of a way to test this. > > What are you running inside the session? > > No real pattern here for good and bad sessions. Matlab, > Python/machine learning stuff, NVIDIA CUDA-accelerated machine learning > programs etc. > > — > Johannes Töger > > Associate Senior Lecturer > Cardiac MR Group > Department of Clinical Sciences Lund, Clinical Physiology Lund > University, Sweden > > -----Original Message----- > From: Ulrich Sibiller <ul...@gmx.de> > Sent: Friday, January 17, 2020 13:25 > To: Johannes Töger <johannes.to...@med.lu.se> > Cc: x2go-user@lists.x2go.org > Subject: Re: [X2Go-User] Long-running x2goagent, high memory usage > > On Fri, Jan 17, 2020 at 11:56 AM Johannes Töger <johannes.to...@med.lu.se> > wrote: > > We are using x2go for a common compute server at our department. We have > > users both on the local LAN and connections to the other side of Europe > > that work really well. Being able to close the client and have computations > > still running in a GUI environment is great. > > > > However, I think we have encountered a bug. Some (but not all) of the > > long-running x2goagent processes start taking a lot of memory, ~30 GB. This > > adds up quickly so that the other users can’t do their work. Below you can > > see how user3 and user7 have x2goagent processes with large memory use (RSS > > column). > > > > How can I go about debugging this? I have quite a bit of Linux experience, > > but I don’t know where to start on this one since I don’t know much about > > how x2go works internally. > > > > Server is on Ubuntu Server 18.04.1 LTS, (x2goserver > > 4.1.0.3-0~1708~ubuntu18.04.1). Clients are on Windows 10, version. 4.1.2.0. > > > > johannes@compute-server:~$ ps -o pid,lstart,rss,user $(pgrep > > x2goagent) > > What version of x2goagent resp. nxagent are you using? dpkg -l nx-libs? > > Can you please run xrestop within such a session and check if there are > numbers that are far away from those of a fresh session? > > You probably cannot answer that due to your usage scenario, but > anyway: does this also happen when you do not disconnect/reconnect? > > What are you running inside the session? > > You could run x2goagent with valgrind to identify memory leaks but I am > unsure if that is working on a stock installation ( I don't do the packaging > for Debian/Ubuntu so I don't know if the deliveres binaries allow for decent > analysis/output). I'll check that this weekend. > > Uli > _______________________________________________ > x2go-user mailing list > x2go-user@lists.x2go.org > https://lists.x2go.org/listinfo/x2go-user _______________________________________________ x2go-user mailing list x2go-user@lists.x2go.org https://lists.x2go.org/listinfo/x2go-user
