Compiz memory usage increased dramatically after updating to 12.10

[autra]

Since I upgrading to 12.10, Compiz is using more than 400 M of memory.
This is not a memory leak because the amount of memory is high at startup and does not increases so much. It can temporally goes over 500 M though.

This is reported against Unity because I don't reproduce this on Gnome Classic.

Note that xorg is also using a lot of memory (around 200 M, instead of 50)

unity 6.8.0
xorg 1:7.7+1ubuntu4
compiz 1:0.9.8.4-0ubuntu3

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: unity 6.8.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 304.43 Sun Aug 19 20:14:03 PDT 2012
 GCC version: gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1)
.tmp.unity.support.test.0:

ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,place,grid,staticswitcher,scale,screenshot,mousepoll,resize,snap,regex,wall,imgpng,workarounds,move,expo,unityshell]
CompositorRunning: compiz
Date: Tue Oct 23 10:20:20 2012
DistUpgraded: 2012-10-19 13:33:21,641 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 304.43, 3.2.0-32-generic, x86_64: installed
 nvidia-current, 304.43, 3.5.0-17-generic, x86_64: installed
 vboxhost, 4.0.12, 3.2.0-32-generic, x86_64: installed
GraphicsCard: NVIDIA Corporation GT218 [GeForce 8400 GS] [10de:10c3] (rev a2) (prog-if 00 [VGA controller])
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
JockeyStatus:
 ERROR:root:Could not find any typelib for AppIndicator3
 kmod:nvidia_experimental_304 - Experimental NVIDIA binary Xorg driver, kernel module and VDPAU library (Proprietary, Disabled, Not in use)
 kmod:nvidia_current - nvidia_current (Proprietary, Enabled, Not in use)
 kmod:nvidia_current_updates - NVIDIA binary Xorg driver, kernel module and VDPAU library (Proprietary, Disabled, Not in use)
MachineType: Dell Inc. OptiPlex 380
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic root=UUID=e653a8d3-1554-4352-a069-e3ae86c6e64e ro quiet splash
SourcePackage: unity
UpgradeStatus: Upgraded to quantal on 2012-10-19 (3 days ago)
dmi.bios.date: 12/06/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A03
dmi.board.name: 0HN7XN
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA03:bd12/06/2010:svnDellInc.:pnOptiPlex380:pvr:rvnDellInc.:rn0HN7XN:rvrA01:cvnDellInc.:ct3:cvr:
dmi.product.name: OptiPlex 380
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.8.4-0ubuntu3
version.ia32-libs: ia32-libs 20090808ubuntu36
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0-0ubuntu1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu3

[autra (autra)]

also, Compiz CPU usage has increased. It is always more than 10% now. Do I fill another bug report for that ?

[Daniel van Vugt (vanvugt)]

Yes, please make CPU a different bug.

As for this one, I have to make it incomplete. Because we need some steps to make the memory high when it wasn't before. Or detailed output from a memory profiler to help us find the root cause.

[autra (autra)]

Thanks Daniel,

After investigating, here are the step to reproduce :
- switch on the computer and log on. Compiz already uses around 220M (which is already twice as in 12.04)
- Open the dash for the first time : Compiz now uses 380 M of memory.
- Open the HUD for the first time : Compiz now uses 430M

I am willing to make a memory profile ! Can you indicate how to make one ? Or give me a link explaining that ?

Thank you a lot ! I think this resource footprint of compiz is what separates Unity from perfection ! Otherwise, it is just awesome !

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 982434, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.