6.0.1
Table Of Contents
- vSphere Resource Management
- Contents
- About vSphere Resource Management
- Updated Information
- Getting Started with Resource Management
- Configuring Resource Allocation Settings
- CPU Virtualization Basics
- Administering CPU Resources
- Memory Virtualization Basics
- Administering Memory Resources
- View Graphics Information
- Managing Storage I/O Resources
- Managing Resource Pools
- Creating a DRS Cluster
- Using DRS Clusters to Manage Resources
- Creating a Datastore Cluster
- Initial Placement and Ongoing Balancing
- Storage Migration Recommendations
- Create a Datastore Cluster
- Enable and Disable Storage DRS
- Set the Automation Level for Datastore Clusters
- Setting the Aggressiveness Level for Storage DRS
- Datastore Cluster Requirements
- Adding and Removing Datastores from a Datastore Cluster
- Using Datastore Clusters to Manage Storage Resources
- Using NUMA Systems with ESXi
- Advanced Attributes
- Fault Definitions
- Virtual Machine is Pinned
- Virtual Machine not Compatible with any Host
- VM/VM DRS Rule Violated when Moving to another Host
- Host Incompatible with Virtual Machine
- Host has Virtual Machine that Violates VM/VM DRS Rules
- Host has Insufficient Capacity for Virtual Machine
- Host in Incorrect State
- Host has Insufficient Number of Physical CPUs for Virtual Machine
- Host has Insufficient Capacity for Each Virtual Machine CPU
- The Virtual Machine is in vMotion
- No Active Host in Cluster
- Insufficient Resources
- Insufficient Resources to Satisfy Configured Failover Level for HA
- No Compatible Hard Affinity Host
- No Compatible Soft Affinity Host
- Soft Rule Violation Correction Disallowed
- Soft Rule Violation Correction Impact
- DRS Troubleshooting Information
- Cluster Problems
- Load Imbalance on Cluster
- Cluster is Yellow
- Cluster is Red Because of Inconsistent Resource Pool
- Cluster is Red Because Failover Capacity is Violated
- No Hosts are Powered Off When Total Cluster Load is Low
- Hosts are Powered Off When Total Cluster Load is High
- DRS Seldom or Never Performs vMotion Migrations
- Host Problems
- DRS Recommends Host be Powered On to Increase Capacity When Total Cluster Load Is Low
- Total Cluster Load Is High
- Total Cluster Load Is Low
- DRS Does Not Evacuate a Host Requested to Enter Maintenance or Standby Mode
- DRS Does Not Move Any Virtual Machines onto a Host
- DRS Does Not Move Any Virtual Machines from a Host
- Virtual Machine Problems
- Cluster Problems
- Index
Administering CPU Resources 4
You can configure virtual machines with one or more virtual processors, each with its own set of registers
and control structures.
When a virtual machine is scheduled, its virtual processors are scheduled to run on physical processors. The
VMkernel Resource Manager schedules the virtual CPUs on physical CPUs, thereby managing the virtual
machine’s access to physical CPU resources. ESXi supports virtual machines with up to 128 virtual CPUs.
This chapter includes the following topics:
n
“View Processor Information,” on page 21
n
“Specifying CPU Configuration,” on page 21
n
“Multicore Processors,” on page 22
n
“Hyperthreading,” on page 22
n
“Using CPU Affinity,” on page 24
n
“Host Power Management Policies,” on page 25
View Processor Information
You can access information about current CPU configuration in the vSphere Web Client.
Procedure
1 Browse to the host in the vSphere Web Client navigator.
2 Click the Manage tab and click Settings.
3 Select Processors to view the information about the number and type of physical processors and the
number of logical processors.
NOTE In hyperthreaded systems, each hardware thread is a logical processor. For example, a dual-core
processor with hyperthreading enabled has two cores and four logical processors.
Specifying CPU Configuration
You can specify CPU configuration to improve resource management. However, if you do not customize
CPU configuration, the ESXi host uses defaults that work well in most situations.
You can specify CPU configuration in the following ways:
n
Use the attributes and special features available through the vSphere Web Client. The
vSphere Web Client allows you to connect to the ESXi host or a vCenter Server system.
VMware, Inc.
21