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Windows 7: Hibernate - Change Size of hiberfil.sys File

Hibernate - Change Size of hiberfil.sys File

How to Change the Size of the hiberfil.sys File in Windows
Published by Brink
18 Mar 2012
Published by

How to Change the Size of the hiberfil.sys File in Windows

information   Information
By default, the size of the hiberfil.sys file is 75% of the total amount of installed RAM (memory) when hibernate is enabled in Vista, Windows 7, and Windows 8.

This tutorial will show you how to change the size of the hiberfil.sys file to what percentage you want it to be.

You must be logged in as an administrator to be able to do the steps in this tutoria.

Note   Note
You can look at the hidden protected OS C:\hiberfil.sys file to see how large it currently is.

1 GB = 1024 MB or 1,048,576 KB or 10,73,741,824 Bytes

1 MB = 1024 KB

1 KB - 1024 Bytes

Hibernate - Change Size of hiberfil.sys File-cmd-1.jpg

warning   Warning
While this can be used to reduce the size of the hiberfil.sys file to save HDD space when you have hibernate enabled, I would only recommend to increase the size to be 100% instead of the default 75% to help make sure that everything in memory is saved when you hibernate.

Here's How:

1. Open a elevated command prompt.

2. In the elevated command prompt type the command below with the percentage (50-100%) you want to resize the hiberfil.sys file to be, and press Enter. (see screenshot below)
NOTE: Substitute percentage in the command with 50% to 100%.
powercfg -h -size percentage

For example: If I wanted to resize hiberfil.sys to be 100%, I would type either of the commands below exactly.
powercfg -h -size 100%


powercfg -h -size 100
Hibernate - Change Size of hiberfil.sys File-cmd-2.jpg
3. When finished, close the elevated command prompt.

That's it,

19 Sep 2017   #1

Windows 7 Ultimate

Dear All,

hibefil.sys is taking 6.36 GB (6,838,988,800 bytes) on my small SSD hard disk drive which is a huge amount of space. I disable hibernation but as i need it so i reactivated it but the size is not decreasing.

I tried to use powercfg hibernate size but no output of it. when i enter the size to 40% so it remain the same above 40% the size increase to 10GB whereas if i give 5% so it remain the same at 6.36 GB.

Can you please Help
My System SpecsSystem Spec
19 Sep 2017   #2

64-bit Windows 10 Pro

Hello naveeddil, and welcome to Seven Forums. :)

You will only be able to set it as low as 50% instead. However, as 50%, you risk not having everything in memory saved to the hibefil.sys when you hibernate.

If you like, you might also take a look at the tutorial below to see if you may be able to free up some space on the SSD.

Hard Disk Space - Free Up and Recover - Windows 7 Help Forums
My System SpecsSystem Spec

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