=20

Overview

Swap space allows your system to utilize the hard drive to supplement ca= pacity when RAM runs short. Composer install will fail if there is insuffic= ient RAM available, but adding swap will allow it to complete installation.=

Solution

Via the command line, you can set up and enable swap on your Debian mach= ine via the following commands (as root):

Set up Swap

=20

fallocate -l 4G /swapfile
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
echo "/swapfile   none    swap    sw    0   0" >> /etc/fstab
sysctl vm.swappiness=3D10
echo "vm.swappiness=3D10" >> /etc/sysctl.conf
sysctl vm.vfs_cache_pressure=3D50
echo "vm.vfs_cache_pressure=3D50" >> /etc/sysctl.conf

=20

Testing the Result

You should see the changes effected immediately, and can check via the c= ommand line:

Test the Result

=20

# You should see swap in use now:
free -m

# Swappiness should now be 10
cat /proc/sys/vm/swappiness

# Cache pressure should be set to 50
cat /proc/sys/vm/vfs_cache_pressure

=20

In this topic:

=20

Set up Swap on Debian 8.x

Overview

Solution

Testing the Result

In this topic:

Related topics: