The following limits apply to Red Hat Enterprise Linux with Xen virtualization. For limits for Red Hat Enterprise Linux with KVM virtualization, see this article. Red Hat also offers Red Hat Enterprise Virtualization, which offers greater scalability and more advanced features. To see limits for Red Hat Enterprise Virtualization, please see Virtualization limits for Red Hat Enterprise Virtualization.
|Red Hat Enterprise Linux 5 XEN x86||Red Hat Enterprise Linux 5 XEN x86_64|
|Maximum number of virtual CPUs in paravirtualized guest||32||32|
|Maximum memory in paravirtualized guest (x86)||64 GB||168 GB1|
|Maximum number of virtual CPUs in fully virtualized guest||32||32|
|Maximum memory in fully virtualized guest||8 GB||512 GB1|
|Minimum memory in fully virtualized guest||512 MB||512 MB|
- Supported limits reflect the current state of system testing by Red Hat and its partners. Systems exceeding these supported limits may be included in the Hardware Catalog after joint testing between Red Hat and its partners. If they exceed the supported limits posted here, entries in the Hardware Catalog will be fully supported. In addition to supported limits reflecting hardware capability, there may be additional limits under the Red Hat Enterprise Linux subscription terms. Supported limits are subject to change based on ongoing testing activities.
- For limits using the KVM hypervisor included with Red Hat Enterprise Linux, please see this article
- Requires Intel EPT or AMD RVI technology support. 32-bit guests with Physical Address Extension (PAE) support will only be able to access 64 GB. This is a virtual hardware limitation.