[Discuss] excessive memory usage in Ubuntu

[Tom Luo]

Hi, all,

I am running a Ubuntu 16.04 server (2GB memory and 2GB swap partition). At
the beginning, the memory usage is fine (less than 20%). However, after I
install some packages:

apt-get install gnome-panel gnome-settings-daemon metacity nautilus
gnome-terminal

the memory usage increases a lot, to 99%. The swap partition is also almost
full.

I used the "top" command to see which program is using a lot of memory.
However, this is not a single significant program. Every program uses less
than 5% memory. The problem is very strange and I don't know how to
solve this problem because reinstall the system.

Any suggestions?

Thanks,

Tom