When CentOS 7 free memory goes below 200 MB, it become unresponsive even to ssh connection.
Currently I have many machines not accessible remotely in peak time due to free memory being between 80 MB to 110 MB.
# free -m total used free shared buff/cache available Mem: 7745 7520 98 2 126 59 Swap: 7935 7935 0
How to keep CentOS 7 responsive to new ssh logins even when its under heavy load?
in other words: if by tweaking sshd config I can access the machine no matter how busy its, then please share you insight.