Novaspirit’s script will dynamically enable ZRAM on your current NavPi. It automatically detects the number of CPU cores to allocate to ZRAM computation, disables existing swap and enables ZRAM swap.
We have tested this on the NavPi devices and it does improve performance, though the USB swap solution seems to be superior if you are relying 100% on using the Chromium UI w/ Keyboard/Mouse connected to your NavPi.
If your current NavPi is running out of memory, ZRAM helps by expanding the amount of data you can store in RAM. It essentially buys you more time if you don’t have the USB swap enabled.
See this guide for information on updating.
After updating, reboot your NavPi if you haven’t already.
If update is successful you should now see the
cfund directory appear in
banlist.dat blocks cfund chainstate database db.log debug.log fee_estimates.dat navcoin.conf navcoin.pid peers.dat wallet.dat
Before proceeding with this swap configuration, it is worth making a backup image of your NavPi’s SD card so if it fails, you can easily restore to this point.
To ensure you don’t lose any coins while making configuration changes to your NavPi, it’s essential to backup the wallet.dat file. This holds your private keys. With a backup of the wallet.dat you can always restore your wallet.
First, make sure your have encrypted your wallet. Then proceed with the following steps:
Backup Wallet. This will download the wallet.dat file to your preferred device (USB, HD)
This will download and copy the
zram.sh script to your
sudo wget -O /usr/bin/zram.sh https://raw.githubusercontent.com/novaspirit/rpi_zram/master/zram.sh
sudo chmod +x /usr/bin/zram.sh
echo '/usr/bin/zram.sh &' | sudo tee -a /etc/rc.local
total used free shared buffers cached
Mem: 923M 879M 43M 6M 22M 97M
-/+ buffers/cache: 760M 163M
Swap: 99M 29M 70M
Pro Tip: Install htop, a nice option for monitoring interactively. It’s a nice way to filter on running processes, like ‘nav’. It combines the functionality of top and iotop into a single screen. It’s not a necessity, you can always just use
sudo apt-get install htop