20gb ram, 10gb zram, 10gb swap, default values. What should I change?

Linux@lemmy.ml – 24 points – 1 years ago

I assume I should get rid of most of the swap. I also read somewhere to increase... swappiness of zram?

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Those defaults sound pretty sensible. I have as much swap as I have RAM because I set things up to hibernate. I believe pop os has the swappiness set to 180 for using the zram.

Should I lower swap? How do I change the swappiness?

Have a look at this for info on swappiness. As for your swap, if it's not causing you problems, it can't hurt to have it.

There's some instructions here but basically:

sudo apt install zram-config
append to end of /etc/sysctl.conf:
```
vm.swappiness = 180
# disable swap readahead (since using zram swap)
vm.page-cluster = 0 
```
Can check these have been applied with cat /proc/sys/vm/page-cluster or .../swappiness

Would these settings be the same if I used the same amount of swap?

If you have more than enough RAM isn't the older suggested configuration of low swappiness + modest swap should be more performant than encouraging the system to swap more and paying the price of compression. EG if you are apt to use 8GB in normal usage 32-64GB are at this point relatively inexpensive.