So I have an Ubuntu server I've built myself. However, today it has started crashing pretty regularly but I can't figure out why.
At first I thought it might correspond to Time Machine backups so I disabled Time Machine completely. Crash still happened. I can say that in each instance I was accessing the server, namely streaming content. I was also downloading torrent files at the time.
At some point the server would become unresponsive and whatever I was streaming would seize. I would try logging into Webmin but the page would time out. As would any other page being pulled from the server. I would also trying creating an SSH connection but it would say no host connection available.
Eventually I'd do a hard restart of the server and it would be back to behaving as if nothing had happened.
However, it has happened multiple times now and I do not know why. I'm afraid, when it comes to Ubuntu, I'm something of a newb. I don't know where to find the error logs and I've been doing some searching. I'd appreciate any director someone can point me in.
OS: Ubuntu Server 12.04
Processor: 3.30 Ghz Intel Core i3
RAM: 8 GB DDR3
Boot Volume: 40 GB SSD
Storage: 5 x 2 TB HDD in ZFS zraid1 array
Since restarting I've checked and all my packages are up to date. I don't believe I'm maxing out my RAM and I'm only using about 40% of my mount volume, less of my storage volumes.