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 <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
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