Zram: Difference between revisions

Revision as of 05:58, 4 June 2025

This page documents how to set up ZRAM in Alpine Linux. Zram can be used as an alternative to Swap partition.

Install the neccessary packages:

For a basic ZRAM swap, configure ZRAM by editing the file /etc/conf.d/zram-init as follows:

Contents of /etc/conf.d/zram-init

load_on_start=yes
unload_on_stop=yes
num_devices=1
type0=swap
size0=8000

Start services:

# rc-service zram-init start

View the ZRAM drive:

# cat /proc/swaps

Check Algorithms:

# cat /sys/block/zram0/comp_algorithm

Advanced setups may also add these parameters to /etc/sysctl.conf as follows:

Contents of /etc/sysctl.conf

vm.page-cluster=0
vm.extfrag_threshold=0
vm.swappiness=100

To ensure that service starts during next reboot:

# rc-update add zram-init

@@ Line 7: / Line 7: @@
 == Configuration ==
-For a basic ZRAM swap, configure ZRAM by editing the file {{path|/etc/conf.d/zram-init}} as follows:{{Cat|/etc/conf.d/zram-init|<nowiki>num_devices=1
+For a basic ZRAM swap, configure ZRAM by editing the file {{path|/etc/conf.d/zram-init}} as follows:{{Cat|/etc/conf.d/zram-init|<nowiki>load_on_start=yes
-size0=8000 </nowiki>}}
+unload_on_stop=yes
+num_devices=1
+type0=swap
+size0=8000
+</nowiki>}}
 Start services:{{Cmd|# rc-service zram-init start}}