Compiz memory usage causing lag

[Sly]

Using Ubuntu 11.10, compiz is causing major lag when moving windows.

Any window movement will lag the system to a crawl. If you move windows fast enough, it will eventually lose track of where the mouse pointer is, and you end up moving the window without being on the titlebar. This is a major problem, because it is causing other things to lag because of compiz using an extraordinary amount of memory. It has actually jumped a couple of times to using over 90% of the memory on my system (with 4GB of RAM), which is unacceptable. I can only imagine what this is doing to people with 2GB of RAM or less.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Kristijan Puljek (sampleofsoul)]

I have the same problem. After a fresh boot the system is fast and snappy (compiz is using about 100-150mb of RAM at that point), but after an hour or so of usage window dragging becomes really laggy and irritating. Compiz is now at 290mb of RAM and increasing with usage.

Also, newly opened windows (terminals, nautilus...) move smoothly the first time I drag them, even when this problem starts occurring, but each subsequent dragging is slow.

I have no third party PPA-s and it's a fresh install, specifically because of this issue. I'll be glad to provide any additional info if needed.

[Kristijan Puljek (sampleofsoul)]

On a side note - this bug report is basically the same as this one (although there are a couple of variations there), and a solution proposed there (mouse polling and\or replacing mouse) helped me https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/764330

[Sly (netrefuge)]

The mouse has absolutely nothing to do with this. I just tested with my touchpad, and it has the same effect with the mouse losing it's position over the titlebar.

[Kristijan Puljek (sampleofsoul)]

Then it's probably not the same cause, even though it looks the same. I thought it was compiz+RAM related, but no matter how high it got (320 was max) it wasn't an issue with a different mouse.