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
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