Arch Linux

lenni

Member

From: London, UK

Registered: 2007-09-21

Posts: 95

Make powertop suggestions permanent

I would like to make the power-saving suggestions from powertop, like this one

Suggestion: increase the VM dirty writeback time from 4.99 to 15 seconds with:
  echo 1500 > /proc/sys/vm/dirty_writeback_centisecs

permanent.

First of all, is that a good idea?

If yes, which file do I put them in?

Last edited by lenni (2008-01-22 10:19:07)

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Beavis

Member

From: UK

Registered: 2005-01-01

Posts: 71

Re: Make powertop suggestions permanent

You can put the entry in your rc.local file as it is or you can add it to sysctl.conf as vm.dirty_writeback_centisecs = 1500, then reboot for the setting to take effect. If you modify the sysctl.conf file then just run sysctl -p which will make the new setting immediately active.

As to whether or not it's a good idea that's really up to you to decide. A bit more info can be found here http://www.linuxinsight.com/proc_sys_vm … isecs.html to help explain what it does.

Hope that helps.

Last edited by Beavis (2008-01-22 12:16:39)