Hello,

When I use samtools 0.1.19 multithreaded sort

samtools sort -@ 3 -m 5000M

I expect the process to use between 15-20Gb (I don't know if it's 3 worker 
threads plus a main thread or not...)


But often the process climbs up to 30Gbm which is almost twice what's expected!

Any ideas why?

Have others have had this issue?

Thanks
Louis

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