VectorLinux

Please login or register.

Login with username, password and session length
Advanced search  

News:

Visit our home page for VL info. For support and documentation, visit the Vector Linux Knowledge Center or search the Knowledge Center and this Forum using the search box above.

Author Topic: Optimizing system swappiness...whereis sysctl.conf?  (Read 6323 times)

silentstone

  • Member
  • *
  • Posts: 25
Optimizing system swappiness...whereis sysctl.conf?
« on: November 24, 2007, 08:52:48 am »

I'm trying to eek the last bit of power out of the laptop battery, and turn down the temperature, too.  Several optimization guides suggest lowering swappiness to below 20 by modifying /etc/sysctl.conf, but this file is missing in my VL5.8 Standard install.  The setting can be changed manually by writing the desired number to the file /proc/sys/vm/swappiness, but this is erased on a reboot.  How do I set this value automatically?
Logged

The Headacher

  • Louder than you
  • Global Moderator
  • Vectorian
  • *****
  • Posts: 1553
  • I like the bass to go BOOM!
    • Multimedia on VL (work in progress)
Re: Optimizing system swappiness...whereis sysctl.conf?
« Reply #1 on: November 24, 2007, 09:03:43 am »

Have you tried making a new file? Just because a file isn't there doesn't mean you can't use it. read "man sysctl.conf" for it's syntax.
Logged
Most music on my soundcloud page was arranged in programs running on VL.

newt

  • Vectorian
  • ****
  • Posts: 1132
Re: Optimizing system swappiness...whereis sysctl.conf?
« Reply #2 on: November 24, 2007, 10:04:20 am »

The comments section from this link (http://lwn.net/Articles/83588/) specifies creating a file the following way, however the file may need to already exists (don't know):
Quote
And if you want it set at every reboot try:-

echo "vm/swappiness=0" >> /etc/sysctl.conf

(Thats how to do it in debian and fedora, its part of the procpc package)

HTH!
Logged

The Headacher

  • Louder than you
  • Global Moderator
  • Vectorian
  • *****
  • Posts: 1553
  • I like the bass to go BOOM!
    • Multimedia on VL (work in progress)
Re: Optimizing system swappiness...whereis sysctl.conf?
« Reply #3 on: November 24, 2007, 10:37:56 am »

the ">>" operator will make sure it's added to the end of the file. If it doesn't exist a new file will be created.
Logged
Most music on my soundcloud page was arranged in programs running on VL.

silentstone

  • Member
  • *
  • Posts: 25
Re: Optimizing system swappiness...whereis sysctl.conf?
« Reply #4 on: February 20, 2008, 08:45:41 am »

Well, this feels belated, but...

Thanks for the tips; they helped!
Logged