I've just noticed that I have 342 MB of log files in /var/log

In particular /var/log/bootchart takes 329 MB of this space!

As I'm only running a home desktop environment, I can't see how I need this amount of "history", and perhaps don't need bootchart at all.

How can I limit/prevent this bootchart logging (and what purpose does it serve)?


First, what is bootchart? Bootchart allows you to check the boot sequence and generate a chart showing how long each process ran during the boot process, and how much CPU/IO they used.

Once installed, bootchart runs on every boot. However, you can edit the variable GRUB_CMDLINE_LINUX_DEFAULT in '/etc/default/grub' to include bootchart=disable, which stops bootchart from running at all. Don't forget to run sudo update-grub afterwards to update GRUB's configuration file.

If you want to run it at a later point, edit the GRUB entry at boot (by pressing the 'c' key at the GRUB menu you can edit the highlighted entry), and remove bootchart=disable from the the 'linux' line. This will enable bootchart once for the following boot.

  • htorque: Thanks... That works nicely... The only thing is that I don't have the "Press C" option at my GRUB menu ...(because I don't have a GRUB menu :) ... but I assume I can just revert via the GRUB_CMDLINE_LINUX_DEFAULT variable in '/etc/default/grub'. – Peter.O Dec 3 '10 at 13:11
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    Oh, in that case I don't know if it's not faster to simply install and uninstall bootchart/pybootchartgui everytime you need it. :*) Doesn't BURG or whatever you are using allow you to edit the boot entries? – htorque Dec 3 '10 at 13:13
  • I'm using a stock-standard 10.04 install from CD; running on the "metal" (no dual-boot), and pressing "c" feverishly (for two reboots) had no effect.... GRUB is one of those arcane anciliary tools that I indulge in on a "need-to-know only" basis .. It is probably quite simple, but there are lots of other things to learn first :) .. – Peter.O Dec 3 '10 at 13:23
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    Ah, in that case your boot menu stays hidden. Try to press the left shift key during your next boot and the menu should show up. – htorque Dec 3 '10 at 13:34
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    Yes! I just tried left Shift on boot; it works; That's a handy bit of info.. Thanks again ;) – Peter.O Dec 3 '10 at 13:44

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