By the way, I started to see the error ` sqAllocateMemory: initial alloc failed!`
and ```
sqAllocateMemorySegmentOfSizeAboveAllocatedSizeInto mmap: Not enough space sqAllocateMemory: initial alloc failed!
```
around the time in 2021 of "oscog-eem.2985" Cog VM and I only observed those errors in the COG VM not in the Stack VM .
As explained since that time I use (succesfully) a patch for the Spur memory management with the Solaris mmap() in the traditional Solaris kernel. I have seen that the patch is not required on Solaris 11.4 which I suspect is due to the fact of backporting changes of the Linux mmap() to UNIX Solaris 11.4.