On 12/01/2020 05:57, jdd@dodin.org wrote:
Le 12/01/2020 à 11:47, Carlos E. R. a écrit :
Now, 5 gigs of ram + 5 gigs of swap approximates 10 gigs of memory. That imprecise saying is good enough for me :-)
in my present understanding, more ram is much better than more swap.
YES!
I situation is so that ram is nearly full, swap is of little use if there is only one application using most of the ram (it can't be swapped)
when one reaches 512Gb ram and have only 1 Tb ssd for swap I wonder if we are not at the extreme possibility of the system?
I wonder that as well. There are aspects of the way paging tables work in Intel architecture that make demands on space in low memory. I'm not sure how that is scalable. Perhaps, after a point, the size of the pages has to increase. We went through that with file system blocks (back in the 1970s, UNIX BSD 4.1 etc), file system logical blocks and later with disk (even rotating rust) physical blocks. Are we going to go through that with VM page sizes as well?
if 1Tb of swap is *really* useful, go for 1Tb more ram.
Sadly, for many, if not all, of us, the motherboard only allows a certain degree of RAM memory expansion, whereas we can more easily allocate swap space on a drive or file system.
look like in case of lack of ram situation swap is only a solution if several memory chunks are not really used (for example unseen tabs in firefox), and if crash can happen it will happen also soon or later with swap
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