My Jenkins has an issue with memory usage when multiconfig jobs are configured to publish TAP test results. When I click and try to view a job after tests have run, the request times out and memory usage on the server goes up until the whole heap is exhausted. Subsequent runs all fail on memory errors and all web requests time out. Disabling the TAP plugin makes the memory problem go away, as far as I can tell. I've made a heap dump from an affected state available here to look at:

http://ftp.mcs.anl.gov/pub/systems/jenkins-heap.bin