Hello, Today I was very surprised to see that KVM with enabled HugePages uses much more memory versus KVM without HugePages enabled.
I have a server with 386Gb memory. I have a VM image which allocate up to 3.2Gb memory (libvirt <memory/> tag). Without HugePages enabled on the server I can create up to 235 VM on the server. With HugePages enabled I can create about 105 VMs on the same server. I reserve 180000 2Mb pages on the server. I see that 180000*2Mb / 3.2 Gb = 112.5 VMs. How KVM without HugePages is able to create 235 VMs? Does KSM help? Is it possible to tune KVM with HugePages up to support ~200 VMs? Thanks -- With best regards, Pavel S. Shirshov -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
