On 12/4/20 1:32 PM, Sreyan Chakravarty wrote:
On Sat, 5 Dec 2020, 2:57 am Samuel Sieb, <samuel@xxxxxxxx
<mailto:samuel@xxxxxxxx>> wrote:
I think you missed the point about it being *fast*. Swapping in RAM is
orders of magnitude faster than swapping to disk, even SSD.
I thought swap was supposed to be used when you were running low on RAM.
Then it kind of makes intuitive sense that the swap will be on disk and
not ram.
Why block RAM by ZRAM Swap? Why not just keep it free?
zram doesn't take up any significant amount of RAM until it's needed.
Then it compresses the swapped data blocks. I see that I've
misconfigured something and ended up with two zram swaps active, so I
have almost 17GB of zram defined on my 12GB laptop. Currently there is
9GB of swapped data using just over 2GB of RAM. So even if I used the
entire 17GB of zram swap, my system would probably still be ok.
# zramctl
NAME ALGORITHM DISKSIZE DATA COMPR TOTAL STREAMS MOUNTPOINT
/dev/zram1 lz4 5G 5G 1.3G 1.4G 4
/dev/zram0 lzo-rle 11.6G 3.8G 931.8M 968.5M 4 [SWAP]
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