The default value for swappiness is 60 however, you can manually set it anywhere between 0-100. Swappiness refers to the kernel parameter responsible for how much and how often that the system moves data from RAM to swap memory. So now that you know the lingo, you're ready to explore what it means. The culprit here is the ‘swappiness’ of the system. Occasionally, a system uses a high percentage of swap memory even when there is RAM available for use. This article is a discussion about this situation and the solution required. If that is the situation that you find yourself in, you’ve come to the right place. However, there is a niche situation that can cause an administrator to need to clear the system swap manually. Most enterprise environments have swap built into the systems, and these memory caches are not manipulated unless there is an apparent lack of memory available or if a server crashes due to the OOM killer (out of memory) error. Swap memory is usually a "set it and forget it" type of affair. How well do you know Linux? Take a quiz and get a badge.Linux system administration skills assessment.
A guide to installing applications on Linux.Download RHEL 9 at no charge through the Red Hat Developer program.
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