Apparently caused by flow logging.

I wasnt seeing this and I had all of the logging on for the last 3 days.

Launch line:
-server -Xmx12000m -Xms12000m -Xmn4500m -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+UseLargePages -XX:+AggressiveOpts

Still doesn't hurt for me to investigate it. I'm pretty sure some memory optimisation is possible in places - I am a noob at Java. I might ask in the plugin dev section if someone fancies helping me with that.

lol, noob huh? This is half the size of BB and does pretty much the same and more. Just keep up the good work and dont get frustrated with the bug reports and the forum users. I see alot of ppl get overwhelmed and flame out. ie: the BB dev, lol.