RAM Limit is 100Gb in the yaml file, but in the jupyterhub terminal showing only 64Gb

limit: 100G
guarantee: 8G
limits: {}
guarantees: {}
In jupyterhub terminal
free -g -h -t
total used free shared buff/cache available
Mem: 61Gi 13Gi 30Gi 134Mi 16Gi 46Gi
Swap: 0B 0B 0B
Total: 61Gi 13Gi 30Gi

How to resolve this?

limit is the maximum memory a pod is allowed to use. How much memory do you have on the node?

node we have 64Gb memory