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Resolved I disabled safe sleep, but my sleep image file keeps returning...

E

eliehass

macrumors regular
Original poster
Aug 19, 2008
186
21
Edit: Nevermind, I think I found the solution here.



I have a rMBP with 16 GB of RAM which was causing me to have a 16 GB sleep image file. I decided I didn't want that much hard drive space wasted for a feature I'm not that interested in, so I opened up the terminal and entered these commands:
sudo pmset -a hibernatemode 0
sudo rm /var/vm/sleepimage
The sleep image file was erased and I was happy.

My issue is that every time I put my laptop back to sleep, the sleep image file returns, even though I disabled safe sleep. I even checked in the terminal. When I input this command in the terminal:
pmset -g | grep hibernatemode
I get this result:
hibernatemode 0
which seems to imply that safe sleep is in fact off...

Does anyone know what may be causing this issue?
 
Last edited:
E

eliehass

macrumors regular
Original poster
Aug 19, 2008
186
21
Godf1st said:
Does disabling it give any performance?
Click to expand...

It just saves you some hard drive space. And possibly lowers the time between when you close your laptop, and when it is actually sleeping, since your computer doesn't have to go through the step of writing your ram to the hard drive. With an SSD though, that time is minimal anyway.
 
Godf1st

Godf1st

macrumors regular
Oct 12, 2012
153
15
eliehass said:
It just saves you some hard drive space. And possibly lowers the time between when you close your laptop, and when it is actually sleeping, since your computer doesn't have to go through the step of writing you ram to the hard drive.
Click to expand...

dukebound85 said:
Correct. If you don't mind the space the file takes up, leave it be. For those with smaller ssd and a lot of ram, it is an unwelcome manifestation at times
Click to expand...


Thanks
 
dusk007

dusk007

macrumors 68040
Dec 5, 2009
3,411
104
eliehass said:
It just saves you some hard drive space. And possibly lowers the time between when you close your laptop, and when it is actually sleeping, since your computer doesn't have to go through the step of writing your ram to the hard drive. With an SSD though, that time is minimal anyway.
Click to expand...
It is still the difference between a couple seconds and pretty much instant. I hat safe sleep because often I close the notebook and remember I still need to check some thing and then you have to wait for it to fully shut down before it can wake again. With hibernate 0 that is pretty much just close, open and ready.

Just curious, what's the disadvantage of disabling safe sleep?
Click to expand...
I never had my battery completely loose power when it is sleeping. It is really a rare issue. Effectively it is like crashing your notebook when the battery runs out. Today you rarely loose any power as most either save their current work progress before they put a system to sleep or it autosaves and you don't loose much.
There really isn't much of a disadvantage. In 98% of times you probably wouldn't loose any data or nothing important and in 99% of the time it would never happen anyway.
Safe sleep exists to make the system more idiot proof but it is really a waste of time, energy and most of all space. An SSD that doesn't have to write a sleep image all the time will live longer and more happily.
 
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