I am currently using a linux server to host a web application. The server does not seem to use any memory for caching. I noticed this, because I had the feeling the machine is pretty slow. I thought it might run out of ram.
Having ssh access, I was able to execute "free -m", which shows me the following:
total used free shared buffers cached Mem: 1536 244 1291 0 0 0 -/+ buffers/cache: 244 1291 Swap: 0 0 0
In my opinion, normally it should use about 90% of its free memory for caching. I've never seen this before.
What might me the problem here?
BTW: It seems to be a RedHat. I don't know too much about RedHat, because I am more a Debian guy.