Am 03.04.2012 00:34, schrieb Przemek Klosowski: > On Mon, Apr 02, 2012 at 08:32:56PM +0200, Miloslav Trmač wrote: >> * #834 F18 Feature: /tmp on tmpfs - >> http://fedoraproject.org/wiki/Features/tmp-on-tmpfs (mitr, 17:40:06) >> * AGREED: tmp-on-tmpfs is accepted (+5 -3) (mitr, 18:12:52) > > The wiki page says: > By implementing this we, by default, generate less IO on disks. This > increases SSD lifetime, saves a bit of power and makes things a bit > faster. > > What about the memory pressure? with on-disk /tmp, the buffer cache prevents excessive writing if there's memory to > spare, but the system still works when memory is used up. What happens with tmpfs? I think it will just grab and > hold memory required for the /tmp filesystem, which is likely to cause swapping, which will hammer the disks even > more. The lack of quota makes it potentially even worse. > > Perhaps this should be a default only for systems with ample memory. Could it be a startup-time setting that is > flipped back to on-disk /tmp if some sustained memory exhaustion is detected? +1 there are enough systems out there with not so much memory even in 2012 the most imprtant point are systems where /tmp is a own partition for many reasons - if there is a entry in /etc/fstab it MUST be honored
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