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 <chan.e...@gmail.com> 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 > (https://www.supermicro.com/products/system/2u/6027/sys-6027tr-htrf.cfm) > (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 http://wiki.x.org > 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: > https://wiki.ubuntu.com/X/Troubleshooting/HighMemory) or I can edit > xorg.conf by adding this option: > > Option "XaaNoPixmapCache" > > (Source: https://www.x.org/releases/current/doc/man/man5/xorg.conf.5.xhtml) > > 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 > > _______________________________________________ > xorg@lists.x.org: X.Org support > Archives: http://lists.freedesktop.org/archives/xorg > Info: https://lists.x.org/mailman/listinfo/xorg > Your subscription address: %(user_address)s _______________________________________________ xorg@lists.x.org: X.Org support Archives: http://lists.freedesktop.org/archives/xorg Info: https://lists.x.org/mailman/listinfo/xorg Your subscription address: %(user_address)s