I am going to 1.9.1 from 1.4.3 and all the functionality works but when I call optimize it works like I think it should eventually merging into one .cfs file. The problem is that my file system usage increases by roughly the size of the index every time I call optimize. I'm running my app in weblogic and when I stop and restart the application my disk usage goes back down. I'm running on a hp unix server and I didn't have this problem with 1.4.3. I haven't found anyone else having this issue?