Comment 2 for bug 155476

Just my two cents:

With everything fully up-to-date, I can only say:

gutsy + nvidia-glx-new + compiz = total disaster

I have an ASUS M2NPV-VM motherboard with an integrated NVidia GeForce 6150GPU. I use the following compiz plugins: Cube, Expo, Rotate Cube, Viewport Switcher, Animations, Water Effect, Windows Decoration, Wobbly Windows, Image loading plugins, Cube Caps, Dbus, Resize info, Video Playback, Application Switcher, Move Window, Place Windows, Scale, Resize Window.

It leaks memory as a rotten barrel and makes my (once beautiful) Ubutnu almost useless. Two or three hours of work and it's dead as a rat. Compiz takes 600-700Mb of 1Gb RAM available, the machine starts swapping and and soon - it's gone.

This was my easisest way to reproduce this bug:

1) Open Thunderbird and Firefox
2) Minimize Thunderbird, Maximize Thunderbird, Minimize Firefox, Maximize Firefox
3) Repeat step 2 and watch how comipz.real leaks memory. You don't need to rotate the cube at all.

After repeating step (2) ten times, memory usage of compiz increased from 275Mb to 433Mb :(

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 5504 sasam 15 0 433m 398m 364m S 1.3 40.8 0:37.62 compiz.real

IMHO, this is a *critical* issue: gutsy, nvidia nad compiz are common on many ubuntu installations and god knows how many users will encounter this problem as soon as they upgrade to gutsy.