Today I had to restart it about 5 times. Usually not a day goes by where I don't have to do at least 1 restart after the programs goes into freeze/lockup mode.
What version of java are you using? How much memory have you got? Works fine for me with 1gb ram and java version 1.6
Using Standalone 865.2, fine all day. Xeon 2.8, 1 GB Ram. Have 3 Real-Time Charts open at once. You better figure your issue if you need to restart it so many times.