6.0.1
Table Of Contents
- vSphere Monitoring and Performance
- Contents
- About vSphere Monitoring and Performance
- Updated Information
- Monitoring Inventory Objects with Performance Charts
- Performance Chart Types
- Data Counters
- Metric Groups in vSphere
- Data Collection Intervals
- Data Collection Levels
- View Performance Charts
- Performance Charts Options Available Under the View Menu
- Overview Performance Charts
- Clusters
- Datacenters
- Datastores
- Disk Space (Data Counters)
- Disk Space (File Types)
- Disk Space (Virtual Machines)
- Storage I/O Control Normalized Latency
- Storage I/O Control Aggregate IOPs
- Storage I/O Control Activity
- Average Device Latency per Host
- Maximum Queue Depth per Host
- Read IOPs per Host
- Write IOPs per Host
- Average Read Latency per Virtual Machine Disk
- Average Write Latency per Virtual Machine Disk
- Read IOPs per Virtual Machine Disk
- Write IOPs per Virtual Machine Disk
- Virtual Machine Observed Latency per Datastore
- Hosts
- Resource Pools
- vApps
- Virtual Machines
- CPU (%)
- CPU Usage (MHz)
- Disk (Average)
- Disk (Rate)
- Disk (Number)
- Virtual Disk Requests (Number)
- Virtual Disk Rate (KBps)
- Memory (Usage)
- Memory (Balloon)
- Memory (Swap Rate)
- Memory (Data Counters)
- Network (Usage)
- Network (Rate)
- Network (Packets)
- Disk Space (Data Counters)
- Disk Space (Datastores)
- Disk Space (File Types)
- Fault Tolerance Performance Counters
- Working with Advanced and Custom Charts
- Troubleshoot and Enhance Performance
- Monitoring Guest Operating System Performance
- Monitoring Host Health Status
- Monitoring Events, Alarms, and Automated Actions
- View Events
- View System Logs
- Export Events Data
- View Triggered Alarms and Alarm Definitions
- Live Refresh of Recent Tasks and Alarms
- Set an Alarm
- Acknowledge Triggered Alarms
- Reset Triggered Event Alarms
- Preconfigured vSphere Alarms
- Monitoring Solutions with the vCenter Solutions Manager
- Monitoring the Health of Services and Nodes
- Performance Monitoring Utilities: resxtop and esxtop
- Using the vimtop Plug-In to Monitor the Resource Usage of Services
- Monitoring Networked Devices with SNMP and vSphere
- Using SNMP Traps with vCenter Server
- Configure SNMP for ESXi
- SNMP Diagnostics
- Monitor Guest Operating Systems with SNMP
- VMware MIB Files
- SNMPv2 Diagnostic Counters
- System Log Files
- Index
Table 1‑9. Data Counters
Chart Label Description
<host>, <resource pool>, or
<virtual machine>
Amount of CPU actively used by the host, resource pool, or virtual machine in the
cluster.
n
Counter: usagemhz
n
Stats Type: Rate
n
Unit: MegaHertz (MHz)
n
Rollup Type: Average (Minimum/Maximum)
n
Collection Level: 1 (4)
Chart Analysis
A short spike in CPU usage indicates that you are making the best use of cluster resources. However, if the
value is constantly high, the CPU demanded is likely greater than the CPU capacity available. A high CPU
usage value can lead to increased ready time and processor queuing of the virtual machines on the hosts in
the cluster.
If performance is impacted, consider taking the following actions.
Table 1‑10. CPU Performance Enhancement Advice
# Resolution
1 Verify that VMware Tools is installed on each virtual machine.
2 If the cluster is not a DRS cluster, enable DRS. Select the cluster, and click Manage > Settings > vSphere DRS >
Edit > Turn ON vSphere DRS.
3 If the cluster is a DRS cluster:
n
Increase the number of hosts, and migrate one or more virtual machines to the new host.
n
Check the aggressiveness threshold. If the value is low, increase the threshold. This might help avoid hot spots
in the cluster.
4 Migrate one or more virtual machines to a new host.
5 Upgrade the physical CPUs or cores on each host in the cluster if necessary.
6 Enable CPU-saving features, such as TCP Segmentation Offload.
7 Replace software I/O with dedicated hardware, such as iSCSI HBAs or TCP Segmentation Offload NICs.
Disk (KBps)
The Disk (KBps) chart displays the disk I/O of the 10 hosts in the cluster with the most disk usage.
This chart is located in the Hosts view of the cluster Performance tab.
Table 1‑11. Data Counters
Chart Label Description
host_name Average data I/O rate across all hosts in the cluster.
n
Counter: usage
n
Stats Type: Rate
n
Unit: Kilobytes per second (KBps)
n
Rollup Type: Average (Minimum/Maximum)
n
Collection Level: 1 (4)
Chapter 1 Monitoring Inventory Objects with Performance Charts
VMware, Inc. 17