Fix memmapping_reducer when 'os' has no attribute 'statvfs' #1366
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Closes #902
In this case when 'os' has no attribute 'statvfs' we don't use
/dev/shm
even if it exists, as we are then not able to determine how much free space it has.The other possible solution could be to ignore
SYSTEM_SHARED_MEM_FS_MIN_SIZE
and still write to/dev/shm
.The typical use case where this could happen is when running a Linux like system on Windows (which doesn't have statvfs apparently). I'm not sure what would be better.