My Ubuntu 19.10 laptop has 32gb ram and a large swap partition. I set add vm.swappiness = 0 to /etc/sysctl.conf so that $ cat /proc/sys/vm/swappiness returns 0

Now I expect that swap will not be used until I run out of free memory. However that not the case and for some reason swap starts filling slowly after about 12gb memory is used.

After $ swapoff -a && swapon -a I get this $ free output:

total used free shared buff/cache available Mem: 32522916 12398516 11957400 3751900 8167000 15906172 Swap: 34180092 0 34180092

But then I open one more nasty tab in Chrome and OS starts swapping and freezing even though I still have tons of memory:

total used free shared buff/cache available Mem: 32522916 12919236 11390868 4063636 8212812 15044060 Swap: 34180092 288000 33892092

Any ideas what is wrong with my configuration and how I could fix it except disabling swap completely?

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