Percpu memory accounts for a large percentage of memory

Solution Verified - Updated -

Issue

  • Why Percpu accounts for a large percentage of memory?
$ cat /proc/meminfo
MemTotal:        7902996 kB
MemFree:          285480 kB
MemAvailable:    1510648 kB
...
Percpu:          2939520 kB
...
  • Why Percpu memory gradually increases while using podman?

  • We're not using podman, but Percpu memory increases. Is this a bug?

Environment

  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 7 (kernel-3.10.0-1127.el7 onwards)
    • podman
  • Red Hat Enterprise Linux CoreOS shipped with Red Hat OpenShift Container Platform 4.8 (older than 4.8.49)
  • Red Hat Enterprise Linux CoreOS shipped with Red Hat OpenShift Container Platform 4.9 (older than 4.9.48)
  • Red Hat Enterprise Linux CoreOS shipped with Red Hat OpenShift Container Platform 4.10 (older than 4.10.31)
  • Red Hat Enterprise Linux CoreOS shipped with Red Hat OpenShift Container Platform 4.11 (older than 4.11.5)

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