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 1‑125. Data Counters
Chart Label Description
System Amount of time spent on system processes on each virtual CPU in the virtual machine.
NOTE This is the host view of the CPU usage, not the guest operating system view.
n
Counter: system
n
Stats Type: Delta
n
Unit: Percentage (%)
n
Rollup Type: Summation
n
Collection Level: 3
Chart Analysis
A large discrepancy in CPU usage between the primary and secondary virtual machines might indicate
performance problems. The CPU ready, system, and wait times of each virtual machine should be
synchronized. A large discrepancy in these values might indicate performance problems. Consider taking
the following actions.
Table 1‑126. CPU Performance Enhancement Advice
# Resolution
1 Verify that the primary and secondary hosts are in the same CPU model family and have similar CPU
configurations. For best results, use CPUs with the same stepping level.
2 Verify that the CPU resource reservations set for both virtual machines are consistent within the cluster. VMware
HA plans for a worst-case scenario by considering all powered on virtual machines in a cluster and finding the
maximum memory and CPU reservations.
3 Verify that the network and datastore connections for both virtual machines are similar.
4 Turn off power management (also known as power-capping) in the BIOS. If power management is enabled, the
secondary host might enter lower performance, power-saving modes. Such modes can leave the secondary virtual
machine with insufficient CPU resources, potentially making it impossible for the secondary to complete all tasks
completed on a primary in a timely fashion.
5 Turn off hyperthreading in the BIOS. If hyperthreading is enabled and the secondary virtual machine is sharing a
CPU with another demanding virtual machine, the secondary virtual machine might run too slowly to complete all
tasks completed on the primary in a timely fashion.
CPU Used Time for vCPU (%)
The CPU Used Time chart displays virtual CPU usage for fault tolerant virtual machines.
This chart is located in the Fault Tolerance view of the Virtual Machine Peformance tab. The chart is
available only for collection levels 3 and 4.
Table 1‑127. Data Counters
Chart Label Description
used Amount of used virtual CPU as a percentage of total available CPU on the primary and
secondary virtual machines.
A high value indicates excessive use of CPU resources.
n
Counter: used
n
Stats Type: Delta
n
Unit: Percentage (%)
n
Rollup Type: Summation
n
Collection Level: 1
Chapter 1 Monitoring Inventory Objects with Performance Charts
VMware, Inc. 89