This is an old desktop I use for some small self hosting services. I never use all my RAM and I don’t see any RAM spikes other than when I install/compile things which I haven’t done in months. I restarted the machine a couple of times, but the SWAP will eventually go right back up to 100%.
I have an Ubuntu server/yunohost setup and found: https://askubuntu.com/questions/157793/why-is-swap-being-used-even-though-i-have-plenty-of-free-ram
My cat /proc/sys/vm/swappiness value is indeed 60. Im not sure what would reduce the SWAP space usage.
Would changing this swappiness value help? Anyone come across this issue before?
EDIT: Found out what it is, its the matrix server that is running on the system. Its taking up a significant amount of swap. Found out via:
smem -s swap -r -p
turning that off, the system is now using 90% less SWAP.
/opt/yunohost/matrix-synaps was the process.
I though that the recommended swap partition was to double until 16 GB? So at 32GB of ram use 32GB of swap?
You should just maintain awareness of how much you’re using. I think 32gb ram + 32gb swap is ridiculous, frankly. Fedora by default sets zram up to 8gb, with no other swap space configured. Works very well that way.
Personally I’d also probably not ever set up more than 16gb of swap space. If I’m somehow hitting that limit it’s because I actually just need to buy more RAM.