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.fabre...@gmail.com> > >> 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 >> _______________________________________________ >> CentOS mailing list >> CentOS@centos.org >> http://lists.centos.org/mailman/listinfo/centos >> > _______________________________________________ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
