In my debugger settings, I've limited the debug console output to 1 Mb, because there is quite a lot of verbose logging going on.
I sometimes pause my debug output to inspect the log. This has two unpleasant consequences:
1. IDEA starts consuming a lot of memory, accumulating a backlog of debug output. This often results in an OutOfMemoryError being thrown by IDEA. The circular backlog buffer should be also limited to 1Mb (or whatever user setting is) and should not grow beyond that.
2. When I resume the logging, IDEA tries to catch up and often locks up consuming 100% CPU. Attached is a thread dump, captured by jstack.