I'm trying to train a model on my raspberry pi 4 B 8gb and numpy can not allocate memory -- it needs 1.09 gb. I went digging online and haven't found anything useful. Vcgencmd get_mem gives me 948M for arm and 76M for GPU. Also there is no mention of memory in config.txt. What is the fix to this? Increasing swapfile to 4096M and memory in settings to 896M caused a fatal error (rip compiled opencv).