Hi, I've noticed that when I try to save a large history dataset from history (e.g SAM file with 17 million lines) that memory usage by the python process running Galaxy increases dramatically, sometimes to the point of crashing my server. Even after the file has been saved to my machine the memory usage is maintained. Is there any way to clear this? Thanks Shaun Webb -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.