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About 3 to 4 hours after turning on my PC, compiz 'memory usage' rose from 300MB up to 1.5GB!
What is happening? What is wrong?

Here is the screen-shot from system monitor:

system monitor

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  • 7
    It seems like a bug, mine doesn't move beyond 150MBs no matter what. do you have any of the extra plugins enabled (those not installed by default , i mean, that can be found in synaptic. i think they are called "compiz-plugins-unsupported" or something like that) If not, you should probably send a bug report
    – Chriskin
    May 8, 2011 at 20:55
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    I think it was because of "window preview" plugin. it's on compiz-plugins-extra package. when I disable it, launch-bar and panel went black! and when I run unity --replace memory usage decrease to about 50MB
    – Behzadsh
    May 8, 2011 at 21:02
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    Warning: the previous command should be unity --replace & when executed from the console.
    – egarcia
    Dec 14, 2011 at 10:27
  • In my case it was unity-scope-clementine. Uninstall it and unity is sane now.
    – HongboZhu
    Jun 20, 2014 at 13:18
  • Would love to add my screenshot, 13.4 GiB used by unity-panel-service on my machine with 16 GB RAM... Fail
    – tworabbits
    Oct 24, 2016 at 16:03

3 Answers 3

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It is a memory leak, probably in multiple places. It should be fixed by Compiz developers. It has been filed as a bug. Please mark yourself as being affected

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  • I think so, I thought it was because of extra plugins but it happened again, and by restarting unity memory usage coma back to 25MB
    – Behzadsh
    May 9, 2011 at 9:28
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    2014 and this memory leak still exists. At least its a well know bug caused by the "indicator-multiload". Just remove it from your system. bugs.launchpad.net/indicator-multiload/+bug/779717 Aug 18, 2014 at 6:04
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I was running into this, and just running "unity --replace &" was enough to drop it from 1.5GB down to about 110MB. I'm guessing Unity is telling compiz to create buffers that Unity is failing to tell compiz to clean up. At least I have a reasonable workaround.

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Report this as a bug to https://launchpad.net/ubuntu/+source/compiz

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