tldr/pages/linux/zramctl.md

zramctl

Setup and control zram devices. Use mkfs or mkswap to format zram devices to partitions.

• Check if zram is enabled:

lsmod | grep -i zram

• Enable zram with a dynamic number of devices (use zramctl to configure devices further):

sudo modprobe zram

• Enable zram with exactly 2 devices:

sudo modprobe zram num_devices={{2}}

• Find and initialise the next free zram device to a 2GB virtual drive using LZ4 compression:

sudo zramctl --find --size {{2GB}} --algorithm {{lz4}}

• List currently initialised devices:

zramctl