Using Sysctls

Sometimes it is necessary to set specific sysctl settings to improve performance.

There is a mechanism available since kubernetes 1.21 where you can set sysctl values from the pod.securityContext. This can be achieved by setting the pxc.containerSecurityContext in the values-pxc-db.yaml

pxc:
  containerSecurityContext:
    sysctls:
      - name: kernel.msgmax
        value: "65536"

Warning

It is important that the value is a string.

There are limitations to the sysctls that can be set. See Kubernetes-Docs