I have to call shenanigans on this one. My music library is about 100GB and accordingly, my iTunes library XML is 31.2MB. My system operates on an SSD, but the

I have to call shenanigans on this one. My music library is about 100GB and accordingly, my iTunes library XML is 31.2MB. My system operates on an SSD, but the entire iTunes DB is located on an internal 2TB hard drive, it's my slow one too. Never experienced this or anything close to this. It could be a bug related to libraries around 200GB or an XML file of over 60MB or something, but it's not directly because of the fact that iTunes re-writes the XML file when you make any change. That does happen, but it shouldn't lock up iTunes unless there is something wrong with your computer. Why? Because iTunes doesn't even use that XML file. It only exists to give 3rd party apps direct access to the iTunes library info. I can jump through my 20,700 song library, with the iTunes folder open watching it rewrite that XML file every time I do anything. No machine slowdown to speak of, on both a Mac Pro and an 11 inch MacBook Air where the library is in the same location as the system. I think there is something wrong with your machine. This would drive me absolutely insane, and I use iTunes every single day for hours a day, almost without exception.