Disable Swap Memory on SD Card

Here's how we can disable the swap memory on SD Card in Raspberry Pi -

Disabling the swap memory on SD Card

1. Turn off the swap file:

sudo dphys-swapfile swapoff

2. Uninstall the swap file:

sudo dphys-swapfile uninstall

3. Remove the swap file service:

sudo update-rc.d dphys-swapfile remove

4. Remove the swap file manager [Optional]:

sudo apt purge dphys-swapfile -y

5. Verifiy the swap is disabled:

free -mh

Source: Pi Australia