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Hello again, > I think this is more or less what was happening, the multicore queue > jobs get on top, run out of space so can't be started and then maui gets > all lazy with the scheduling of the "stuck" jobs. After increasing my > RESERVATIONDEPTH and setting MAXIJOBS=1 for the multicore queue > scheduling seems to be working as expected for the first time. Whether > this is due to these changes or some other factor (maybe my tears > soaking into my keyboard invoked mercy from the dark gods of cluster > computing?). There are still many improvements I want to try (liek > Stuart's suggestion at partitioning my nodes, but at least now I have a > baseline that works! Well I kind of spoke too soon yesterday - after filling the queues just long enough for me to get my hopes up maui then started playing silly buggers again. It's behaving better, keeping things 80%-90% full (with peaks and troughs in free job slot utilisation) , but that's still too much waste. Once more unto maui.cfg I go (I hope to implement some of Stuart's priority and weighting suggestions), any further advice would of course be appreciated! Have a good weekend all! Matt