I haven't got even 1000 tasks, but you track freezes during search. I have a project with prefix for tasks FW. So I tryed for quick search and placed FW-32 in search area and pressed enter. It started some process and that was it. I was unable to access anything else. Only after shuting down tomcat on ubuntu server and starting up again I was able to get it back to work.
What might be the issue here?