6.7
Table Of Contents
- vSphere Resource Management
- Contents
- About vSphere Resource Management
- Getting Started with Resource Management
- Configuring Resource Allocation Settings
- CPU Virtualization Basics
- Administering CPU Resources
- Memory Virtualization Basics
- Administering Memory Resources
- Persistent Memory
- Configuring Virtual Graphics
- 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
System swap allows the system to reclaim memory from memory consumers that are not virtual
machines. When system swap is enabled you have a tradeoff between the impact of reclaiming the
memory from another process and the ability to assign the memory to a virtual machine that can use it.
The amount of space required for the system swap is 1GB.
Memory is reclaimed by taking data out of memory and writing it to background storage. Accessing the
data from background storage is slower than accessing data from memory, so it is important to carefully
select where to store the swapped data.
ESXi determines automatically where the system swap should be stored, this is the Preferred swap file
location. This decision can be aided by selecting a certain set of options. The system selects the best
possible enabled option. If none of the options are feasible then system swap is not activated.
The available options are:
n
Datastore - Allow the use of the datastore specified. Please note that a vSAN datastore or a VVol
datastore cannot be specified for system swap files.
n
Host Swap Cache - Allow the use of part of the host swap cache.
n
Preferred swap file location - Allow the use of the preferred swap file location configured for the host.
Configure System Swap
You can customize the options that determine the system swap location.
Prerequisites
Select the Enabled check box in the Edit System Swap Settings dialog box.
Procedure
1 Browse to the host in the vSphere Client.
2 Click Configure.
3 Under System, select System Swap.
4 Click Edit.
5 Select the check boxes for each option that you want to enable.
6 If you select the datastore option, select a datastore from the drop-down menu.
7 Click OK.
vSphere Resource Management
VMware, Inc. 46