I don't understand why my htop meter is full already. I'm not even running some task. Here's the screenshot of my htop:
The green meter shows used memory, the blue meter shows buffers, the yellow meter shows cache. it seems that the cache have used up all my memory here. Or am I just confused? Because the numeric number shows 48/494MB.
So what is happening here? Should I increase the memory of my server?
I'm going to run nginx, php and wordpress. is this server enough to handle this setup?