At 18:14 4/12/2016 +0000, you wrote: >Could you provide logs taken from both runs? Do I understand >correctly that it did not shown the 'found n CPUs, using n >worker threads' in the second run? Hi Witold, I've attached the startup messages. I confused 9.10.4 and 9.9.9 somewhat, but the observation holds that 9.9.9 is running one thread under SUID when it should be running two threads. Possibly 9.10.4 works correctly, but I'm not certain. I started with 9.10 and it quickly failed with a SEGV trap do I switched to 9.9.9. I'm not sure exactly when I turned on the SUID named, but it is definitely in effect for 9.9.9b2 where only one thread is observed. Regards, David