I am running a low-end server with about 1GB RAM and I was trying to optimize my ram. But after increasing my swap file and emptying the buffers, my total ram, judging from
free -m, have lowered from 1 GB to 660 MB - and I cannot run my applications anymore.
Repro steps: I have used the commands
echo 1 > /proc/sys/vm/drop_caches echo 2 > /proc/sys/vm/drop_caches echo 3 > /proc/sys/vm/drop_caches
Then, I have tried
swapoff -a and
And then I increased my swap file, as described here: https://www.linux.com/learn/increase-your-available-swap-space-swap-file
I have no idea what lowered my total memory. Could anyone help, please? Thanks in advance!
I am running Centos.