Looks like firewall/av/driver memleak. Java can use max 1.78GB and yet overall memory consumption is rising. What is the overall memory usage of system over time? watch swap usage.
What kind of links do you have in list? what hoster?
That high CPU usage in downloadlist is not normal. I can offer you a teamviewer session so we check this out together if you like
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JD-Dev & Server-Admin
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