i am still not able to understand why did this problem started for past 30 days..... previous two year i am not faced this issue.... what gone wrong in my side ?
Yeah..., you should not overcommit RAM. It just does not work well. In all of my (Homelab-) systems RAM is always the most critical resource :-(I was short on RAM.
~# apt show zram-tools
Description: utilities for working with zram
zram is a Linux kernel module that allows you to set up compressed
filesystems in RAM.
.
zram-tools uses this module to set up compressed swap space.
This is useful on systems with low memory or servers
running a large amount of services with data that's easily swappable
but that you may wish to swap back fast without sacrificing disk
bandwidth.
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