Backtrader runs out of memory fixed by increasing Ubuntus SWAP memory

increseUbuntuSwapMemory.sh

# For some backtests with large data python library backtrader runs out of memory and freezes the system
# Since I use Ubuntu I can prevent this by increasing available SWAP memory

# Add more SWAP memory
sudo fallocate -l 10g /mnt/additional.swap # Create a file with a fixed size
sudo chmod 600 /mnt/additional.swap # Set needed permissions in order to use as SWAP file
sudo mkswap /mnt/additional.swap # Format as swap file
sudo swapon /mnt/additional.swap # Use NOW as SWAP temporarily
echo '/mnt/additional.swap swap swap defaults 0 0' | sudo tee -a /etc/fstab # Use permanently as SWAP

# Test if the system recognise the SWAP file
cat /proc/swaps

# Read for reference: https://help.ubuntu.com/community/SwapFaq

#Try on debian 10 VPS(works with KVM but not with LXC)
fallocate -l 2g /mnt/additional.swap
chmod 600 /mnt/additional.swap
/sbin/mkswap /mnt/additional.swap
/sbin/swapon /mnt/additional.swap #Error: swapon: /mnt/additional.swap: swapon failed: Operation not permitted



# Seems that this is not allowed on VPS using OpenVZ
https://unix.stackexchange.com/questions/2893/swapon-operation-not-permitted