I have two Ubuntu Servers: one acting as db server (mysql) and file server and the application server. Using this three service an application has been working flawlessly for months.
Now we've found out that around 7:45 EVERY morning it really slows down. After an hour everything becomes fast again and usable without human intervention. I'm trying to track down the problem...
Is there any kind of tool to monitor and log cpu, ram, disk, network usage? How should I proceed to find the problem quickly?