RHEL 8: Premature swapping with swappiness=0 while there is still plenty of pagecache to be reclaimed

Solution Verified - Updated -


  • Even if memory is under pressure with swappiness=0, the inactive pagecache is swapped out instead of pagecache being reclaimed.
  • The system wide swappiness value specified at /proc/sys/vm/swappiness has little-to-no effect on the swap characteristics of a system with CgroupV1. This issue may lead to unexpected and inconsistent swap behaviour.


  • Red Hat Enterprise Linux (RHEL) 8
  • systems utilizing Cgroups v1

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content