I need more explanation of "free -m" linux command.
[root@xxxxxx /]# free -t -m
total used free shared buffers cached
Mem: 2026 1817 208 0 404 1035
-/+ buffers/cache: 377 1648
Swap: 2047 17 2030
Total: 4074 1835 2238
As shown, we have 2G total, 1.8G used and 208 Megs free. Everybody will say that we need RAM, but
inline total : 4G total, 1.8G used, 2.2G free, so do I really need more memory ?
Is it good to use swap memory ?
We ask this question because the server is suddenly slow.
see this image ( Plesk shows 40% of memory used ) ?