Recommended memory size for F19?

Nicolas Mailhot nicolas.mailhot at laposte.net
Thu Apr 11 15:19:57 UTC 2013


Le Jeu 11 avril 2013 14:07, Richard W.M. Jones a écrit :
> On Thu, Apr 11, 2013 at 01:51:16PM +0200, Nicolas Mailhot wrote:
>>
>> Le Mer 10 avril 2013 22:52, Richard W.M. Jones a écrit :
>> > On Wed, Apr 10, 2013 at 06:55:59PM +0200, Ralf Corsepius wrote:
>> >> Disable /tmp on tmpfs?
>> >
>> > I have suggested this should be done automatically in RAM-limited
>> > situations (primarily for VMs):
>> >
>> > https://bugzilla.redhat.com/show_bug.cgi?id=858265
>> >
>> > Well, ideally it would never have been done in the first place, but we
>> > are where we are.
>>
>> Ideally it should never have been done without some automated way to
>> grow
>> swap via files in /var/tmp when the tmpfs gets saturated (and possibly
>> shrink it back when the pressure ceases). That's the only way to get the
>> benefits of a ramdisk without hitting mem limits at unexpected moments.
>
> This would be quite complex.

I don't contest this, but it is still less complex than expecting all the
unix software that has been written in the last decades to stop using /tmp
for big files because it is suddenly limited by memory limits.

I don't mind systemd exploring new concepts (and in fact I like it) but it
is not reasonable to push those new concepts in a state which is known to
break existing software. The tmpfs change has only been implemented
halfway.

-- 
Nicolas Mailhot



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