I too knew someone in HFT ages ago that spoke of using java even in the hot path. He told me they disabled GC altogether in combination with not generating garbage in the hot path, with large enough machines to not OOM before markets closed for the day.
From what I saw poking at the development trading boxes they over-provisioned both cpu ghz and ram to a ridiculous level. The machines looked nearly idle at their busiest.
From what I saw poking at the development trading boxes they over-provisioned both cpu ghz and ram to a ridiculous level. The machines looked nearly idle at their busiest.