Jupyter Lab freezes the computer when out of RAM - how to prevent it?

Question

I have recently started using Jupyter Lab and my problem is that I work with quite large datasets (usually the dataset itself is approx. 1/4 of my computer RAM). After few trans

Answer 1

I am going to summarize the answers from the following question. You can limit the memory usage of your programm. In the following this will be the function ram_intense_foo(). Before calling that you need to call the function limit_memory(10)

import resource
import platform
import sys
import numpy as np 

def memory_limit(percent_of_free):
    soft, hard = resource.getrlimit(resource.RLIMIT_AS)
    resource.setrlimit(resource.RLIMIT_AS, (get_memory() * 1024 * percent_of_free / 100, hard))

def get_memory():
    with open('/proc/meminfo', 'r') as mem:
        free_memory = 0
        for i in mem:
            sline = i.split()
            if str(sline[0]) == 'MemAvailable:':
                free_memory = int(sline[1])
                break
    return free_memory

def ram_intense_foo(a,b):
    A = np.random.rand(a,b)
    return A.T@A

if __name__ == '__main__':
    memory_limit(95)
    try:
        temp = ram_intense_foo(4000,10000)
        print(temp.shape)
    except MemoryError:
        sys.stderr.write('\n\nERROR: Memory Exception\n')
        sys.exit(1)