5.7

2 Click the View tab under the Planning tab and select the Stressed Hosts and Clusters - List view.
The objects that appear in this view are overused and have fewer resources than the virtual machines
demand.
What to do next
Assign less work to these hosts and clusters or reconfigure the capacity appropriate to the workload.
Finding the Cause of the Problem
To find the cause of a problem, examine its symptoms, the objects affected, and the time frame.
Perform these main steps to research the cause of a problem.
1 Examine the symptoms on the Workload, Anomalies, and Faults badges and scores.
If workload is high, review performance degradation. In particular, examine memory resource problems
and the top consumers of resources.
If anomalies are high or the workload is abnormal, look for events that occurred when the objects
experienced the problem.
2 Determine the affected population.
Determine whether one object is affected, or whether peers or families are affected.
3 Determine the time frame of the problem.
Use the Health weather map and Stress charts to determine if the problem is recent and isolated or chronic
in nature.
n
Determine Whether the Environment Operates as Expected on page 40
Anomalies in vCenter Operations Manager provide insight into the behavior of your environment and
help you to determine whether a high workload might still reflect a normal or expected load.
n
Identify the Source of Performance Degradation on page 40
Identifying the probable source of performance degradation in vCenter Operations Manager involves
investigating the percentage of CPU, memory, disks, and network resources usage in the virtual
environment.
n
Identify the Underlying Memory Resource Problem for a Virtual Machine on page 41
When you navigate through a vCenter Operations Manager workflow and identify a virtual machine
with a potential problem, you can resolve the underlying problem by using the memory metric data.
n
Identify the Underlying Memory Resource Problem for Clusters and Hosts on page 42
When you navigate through a vCenter Operations Manager workflow and identify a cluster or a host
with a potential problem, check the CPU metric graphs to identify a possible resolution.
n
Identify the Top Resource Consumers on page 42
To address high use levels in your virtual environment, identify the top resource consumers.
n
Identify Events that Occurred when an Object Experienced Performance Degradation on page 43
Identifying when the abnormal events started to cause performance degradation and the trend of the
problem in vCenter Operations Manager involves examining the Health scores of the object and its
related objects.
n
Determine the Extent of a Performance Degradation on page 43
After you identify the performance problem, determine the effect on the rest of the object population and
the consistency of the issue.
Chapter 4 Troubleshooting with vCenter Operations Manager
VMware, Inc. 39