K3s take too mush memory

there are only 4 nodes in this cluster

and

kubectl get all --all-namespaces

output thousands line like below

confluence               pod/confluence-55dbcb9788-pckg4                                     0/1     Evicted            0          10d
confluence               pod/confluence-55dbcb9788-wmg5q                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-zfnlh                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-26w8j                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-6rtr7                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-bz6f4                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-8l6cp                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-4wxpg                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-2rhdt                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-8h7vr                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-xwvr4                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-8hk4w                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-jpl4z                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-47qxb                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-jsvnj                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-v22jq                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-b276t                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-g678s                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-sf949                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-zp2pt                                     0/1     Evicted            0          11h
confluence               pod/confluence-55dbcb9788-ws2ns                                     0/1     Evicted            0          11h

solved by
/usr/local/bin/k3s server --kube-controller-manager-arg terminated-pod-gc-threshold=100