[ale] Anyone know if this is true?

[Geoffrey Myers]

Damon L. Chesser wrote:
> On Wed, 2011-10-12 at 15:13 -0400, Geoffrey Myers wrote:
>> 'Just so you all know, when determining how much space to assign to 
>> swap: Swap isn't just used for paging or virtual memory management; swap 
>> is also used by power management for suspend-to-disk (hibernation). '
>>
>> I seriously don't know, so I'm asking.
> 
> Yes, it is true.  If you have 4GB of RAM, you need at least 4GB in order
> to hibernate and suspend to disk.

So if you have 16GB memory, you must have 16GB of swap?  Seems a bit 
inefficient.  I would assume you are rarely using 16GB.  Why not just 
write what is being used?

> 
> All the contents of RAM are written to swap and that is used to come
> back up in the "saved" state.  This is also why, if you have encrypted
> partitions, you need to have encrypted swap as well.
> 
> What I am confused about are the two names used to suspend:  the mode
> where you use zero power and everything is written to disk and the mode
> where you just shutdown the drives, screen, and only use RAM.
> 
> 
> 


-- 
Until later, Geoffrey

"I predict future happiness for America if they can prevent
the government from wasting the labors of the people under
the pretense of taking care of them."
- Thomas Jefferson