9/17/2019 Update: may have got to the bottom of this. Please try 6.7.3-rc3 available on the next branch.
9/18/2019 Update: 6.7.3-rc4 is available to address Very Slow Array Concurrent Performance.
re:
Trying to get to the bottom of this... First we have not been able to reproduce, which is odd because it implies there may be some kind of hardware/driver dependency with this issue. Nevertheless I want to start a series of tests, which I know will be painful for so
Closed
The update is we are still working on this problem and we have looked at a lot of code. But what we can't do at the present time is go back to the 6.6.7 build (which does not display this issue) and start adding stuff one-by-one on the path to 6.7.x until we hit something. Then if we determine it's a kernel change, we face the task of bisecting the kernel. The problem with this approach it that it's extremely time-consuming, especially when each 'run' might take several hours or even days to