Hi,
did you by any chance check ‘Use automatic chunk count’?
There seems to be a problem with the automatic detection concerning the number of available CPUs with AWS. See also here Azure VM - KNIME Server for a deeper explanation.
The general rule we’re using to calculate the number of threads is
1.5 * #available Cores (rounded up)
Whereas cores with hyperthreading count as 2 cores.
Cheers,
Moritz