KVM has KSM, so there is definitely the possibility of having say, 150x 1GB VMs ...

patrickg_zill on March 5, 2017 | parent | context | favorite | on: Vultr introduces $2.50/month plan

KVM has KSM, so there is definitely the possibility of having say, 150x 1GB VMs on a 128GB physical RAM server; possibly much more than that depending how much KVM/KSM has improved since I last looked at it.