<div dir="ltr">I'm a little bit confused by your reply here.<div> </div><div>If it doesn't rely on GL, can you please help clarify why would I want to use Xvnc instead?</div><div> </div><div>(Was that suppose to be "If it DOES (rely on GL), to use Xvnc instead"?)</div><div> </div><div>Thanks.</div></div><div class="gmail_extra"> <div class="gmail_quote">On Tue, Dec 5, 2017 at 7:17 PM, Vladimir Dergachev <<a href="mailto:volodya@mindspring.com" target="_blank">volodya@mindspring.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On Tue, 5 Dec 2017, Ewen Chan wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Not really sure. Someone suggested that I tried Xvfb but I didn't really know how I can use that without using an X server already, and again, in trying to conduct my own due diligence research into the issue, I stumbled upon using ssh -Y and enabling X11 forwarding via ssh so I will have to see how that works next (unless there are other suggestions that come before that that I can also quickly test out as well). </blockquote> If your app relies on GL you don't want to use ssh -Y. If it does not, then I recommend running it in Xvnc instead. best Vladimir Dergachev<div class="HOEnZb"><div class="h5"> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Thanks. On Tue, Dec 5, 2017 at 6:36 PM, Vladimir Dergachev <<a href="mailto:volodya@mindspring.com" target="_blank">volodya@mindspring.com</a>> wrote: Also, given the the high usage does not happen outside of gnome session, perhaps this is connected to compositing.. best Vladimir Dergachev On Wed, 6 Dec 2017, Hi-Angel wrote: The troubleshooting link you provided states that the high memory usage typically belongs to some other application. Sorry, I am just an occasional bystander here, and can't tell much of technical details, but I imagine it works like this(I hope someone will correct me on details): an app requests, for example, a glx object, and XServer allocates one. When the app is done with the object, it requests XServer to deallocate it. The point is: although this memory accounted on part of XServer process — it is actually owned by the app. The link also states that you can use `xrestop` application to see the owners and amounts of the memory. On 5 December 2017 at 21:14, Ewen Chan <<a href="mailto:chan.ewen@gmail.com" target="_blank">chan.ewen@gmail.com</a>> wrote: To Whom It May Concern: Hello everybody. My name is Ewen and I am new to this distribution list. So let me start with a little bit of background and the problem statement of what I am seeing/encountering. I am running a SuperMicro Server 6027TR-HTRF (<a href="https://www.supermicro.com/products/system/2u/6027/sys-6027tr-htrf.cfm" rel="noreferrer" target="_blank">https://www.supermicro.com/products/system/2u/6027/sys-6027tr-htrf.cfm</a>) (which uses a Matrox G200eW graphics chip and it has four half-width nodes, each node has two processor, each processor is an Intel Xeon E5-2690 (v1) (8-core, 2.9 GHz stock, HTT disabled) running SuSE Linux Enterprise Server 12 SP1 (SLES 12 SP1). Here are some of the outputs from the system: ewen@aes4:~> X -version X.Org X Server 1.15.2 Release Date: 2014-06-27 X Protocol Version 11, Revision 0 Build Operating System: openSUSE SUSE LINUX Current Operating System: Linux aes4 3.12.49-11-default #1 SMP Wed Nov 11 20:52:43 UTC 2015 (8d714a0) x86_64 Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.12.49-11-default root=UUID=fc4dcdb9-2468-422c-b29f-8da42fd7dec0 resume=/dev/disk/by-uuid/1d5d8a9c-218e-4b66-b094-f5154ab08434 splash=silent quit showopts crashkernel=123M,high crashkernel=72M,low Build Date: 12 November 2015 01:23:55AM Current version of pixman: 0.32.6 Before reporting problems, check <a href="http://wiki.x.org" rel="noreferrer" target="_blank">http://wiki.x.org</a> to make sure that you have the latest version. ewen@aes4:~> uname -a Linux aes4 3.12.49-11-default #1 SMP Wed Nov 11 20:52:43 UTC 2015 (8d714a0) x86_64 x86_64 x86_64 GNU/Linux The problem that I am having is that I am running a CAE analysis application and during the course of the run, X will eventually consume close to 100 GiB of RAM (out of 125 GiB installed) ewen@aes4:~> date Tue Dec 5 05:08:28 EST 2017 ewen@aes4:~> ps aux | grep Xorg root 2245 7.7 79.0 271100160 104332316 tty7 Ssl+ Nov25 1078:19 /usr/bin/Xorg :0 -background none -verbose -auth /run/gdm/aut h-for-gdm-9L7Ckz/database -seat seat0 -nolisten tcp vt7 ewen 11769 0.0 0.0 10500 944 pts/1 R+ 05:08 0:00 grep --color=auto Xorg This does not occur when I perform the same analysis in runlevel 3 and when I switch back to runlevel 5 and I am using GNOME for the desktop environment, regardless of whether I initiate the analysis via a Terminal inside GNOME or I ssh into the system (via cygwin from a Windows box), the host server's X memory usage will continually increase as the analysis progresses. In trying to research this issue, I have found that I can either restrict the amount of cache that X does via ulimit -m (Source: <a href="https://wiki.ubuntu.com/X/Troubleshooting/HighMemory" rel="noreferrer" target="_blank">https://wiki.ubuntu.com/X/Troubleshooting/HighMemory</a>) or I can edit xorg.conf by adding this option: Option "XaaNoPixmapCache" (Source: <a href="https://www.x.org/releases/current/doc/man/man5/xorg.conf.5.xhtml" rel="noreferrer" target="_blank">https://www.x.org/releases/current/doc/man/man5/xorg.conf.5.xhtml</a>) Would that be the recommended solution to the problem that I am experiencing with X? A couple of other notes: ewen@aes4:~> free -g total used free shared buffers cached Mem: 125 125 0 0 0 3 -/+ buffers/cache: 122 3 Swap: 256 170 85 ewen@aes4:~> cat /proc/sys/vm/vfs_cache_pressure 200 Your help and commentary would be greatly appreciated. Thank you. Sincerely, Ewen Chan _______________________________________________ <a href="mailto:xorg@lists.x.org" target="_blank">xorg@lists.x.org</a>: X.Org support Archives: <a href="http://lists.freedesktop.org/archives/xorg" rel="noreferrer" target="_blank">http://lists.freedesktop.org/archives/xorg</a> Info: <a href="https://lists.x.org/mailman/listinfo/xorg" rel="noreferrer" target="_blank">https://lists.x.org/mailman/listinfo/xorg</a> Your subscription address: %(user_address)s _______________________________________________ <a href="mailto:xorg@lists.x.org" target="_blank">xorg@lists.x.org</a>: X.Org support Archives: <a href="http://lists.freedesktop.org/archives/xorg" rel="noreferrer" target="_blank">http://lists.freedesktop.org/archives/xorg</a> Info: <a href="https://lists.x.org/mailman/listinfo/xorg" rel="noreferrer" target="_blank">https://lists.x.org/mailman/listinfo/xorg</a> Your subscription address: %(user_address)s </blockquote> </div></div></blockquote></div> </div>