How to Change the Hibernation File Size

When your computer goes into hibernate the files in memory (RAM) are saved into a file on the hard disk. This file is called hiberfil.sys and by default is set to be 75% of your total RAM size. You can adust this if you need to.

Adjust Hibernation File Size

Open a command prompt window as an Administrator
Type the following command, when 75 is the percentage you want

powercfg.exe /hibernate /size 75

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3 Comments (Newest on top)

Curtis says:

17/04/2010 at 8:32 pm

Many thanks for posting this. It’s exactly what I needed.

Reply
alex says:

06/10/2011 at 8:23 am

By default the hibernation file is 100% of the RAM memory, not only 75%.

Reply
- Ben says:
  
  07/10/2011 at 7:33 am
  
  I put 75% as this is what I used on my EEE that wouldn’t hibernate due to a tiny first disk.
  Of course you can’t hibernate if your ram usage is higher
  
  Reply