You know that you don't need a swap partition for hibernation?
s2disk(uswsusp) makes a swapfile on your hdd prior to hibernating and
only activates it for hibernation purposes, so you don't have to have
swap active all the time.
On 2013-07-23 20:28, Martin Šťastný wrote:
> Thank you for you responses,
>
> first of all I need same amount of swap space as of memory, because I
> want
> to use hibernation. Problem of placing swap partition on SSD is not
> with
> too many writes, but with to much space used for nothing (in my case 8
> GB,
> 16 GB in not so far future). I know about "swappiness" kernel tunable,
> but
> I guess it has nothing to do with how often is partition "simply
> touched
> for nothing" and therefore hard drive is spinned up. For example - if I
> set
> HDD to spin down after two minutes and kernel will touch swap
> approximately
> every five minutes, it means that hard drive will be spinned up 120
> times
> every day (10 hours of power on), 43 800 cycles per year which will
> definitely wreck my HDD :-(.
>
> 2013/7/23 Jorge Fábregas <jorge.fabregas@xxxxxxxxx>
>
>> On 07/23/2013 01:22 PM, Martin Šťastný wrote:
>> > how often is kernel touching swap space
>>
>> There's a kernel tunable called "swappiness" [1] to control that. You
>> can add an entry in /etc/sysctl.conf like this:
>>
>> vm.swappiness=0
>>
>> ...and the kernel will avoid, as much as it can, to use swap.
>>
>> HTH,
>> Jorge
>>
>> [1]: http://en.wikipedia.org/wiki/Swappiness
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