Check for Swappiness

The swappiness kernel parameter defines the amount, and how often, the kernel copies RAM contents to a swap space. Vertica recommends a value of 1. The installer reports any swappiness issues with identifier S0112.

To set the swappiness value add or update the following in /etc/sysctl.conf:

vm.swappiness = 1

This also ensures that the value persists after a reboot.

You can check the swappiness value as follows:

cat /proc/sys/vm/swappiness

If necessary, you change the swappiness value at runtime by logging in as root and running the following:

echo 1 > /proc/sys/vm/swappiness