Bug 734639
Summary: | SME Review Host Config n Guest Installation Guide ch 4 | ||
---|---|---|---|
Product: | Red Hat Enterprise Linux 6 | Reporter: | Don Dutile (Red Hat) <ddutile> |
Component: | doc-Virtualization_Host_Configuration_and_Guest_Installation_Gui | Assignee: | Scott Radvan <sradvan> |
Status: | CLOSED CURRENTRELEASE | QA Contact: | ecs-bugs |
Severity: | unspecified | Docs Contact: | |
Priority: | unspecified | ||
Version: | 6.2 | CC: | rlandman, tburke |
Target Milestone: | rc | Keywords: | Documentation |
Target Release: | --- | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2011-10-04 00:52:14 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: | |||
Deadline: | 2011-09-15 |
Description
Don Dutile (Red Hat)
2011-08-31 03:06:06 UTC
Instead of the current state: "CPU overcommit It is not recommended to have more than 10 virtual CPUs per physical processor core. Any number of overcommitted virtual CPUs above the number of physical processor cores may cause run time delays with certain virtualized guests. Refer to the Red Hat Enterprise Linux Virtualization Administration Guide for tips and recommendations on overcommitting CPUs." I think we should generalize it and say that: It is not recommended to have more than 10 virtual CPUs per physical processor core. Customers are encouraged to use a capacity planning tool in order to determine the cpu over commit ration. It is hard to estimate what's the actual ratio would be since it is highly dependent on the workload - A VM may consume 100% cpu on one use case and multiple VMs would be completely idle on others. In addition to that, note that we do not support running more #vcpu belonging to a single VMs than the number of overall physical cores. Hyperthread can be considered cores but expect them not to perform as regular cores. It may vary between one scenario to the next |