5.8.5

pcaPFraction = 0.9
pcaDataSetSamplePercent = 10.0
pcaConstantPercentile = 90.0
pcaEpsilon = 0.00001
Run the PCA Tool
You can use the PCA tool to eliminate linearly correlated metrics from the dynamic threshold calculation.
Prerequisites
Become familiar with the pca.properties file. See “pca.properties File,” on page 155.
Procedure
1 Configure the resource kinds on which to run the PCA tool and the number of days to include in the
PCA calculation.
a Open the pca.properties file in a text editor.
The pca.properties file is in the vcenter-ops\tools\pca\conf directory. In a vApp installation, edit
the pca.properties file on the Analytics virtual machine.
b Set the pcaRKList property to a comma-separated list of resource kind keys.
This list determines the resource kinds on which to run the PCA tool.
c Set the pcaDaysToProcess property to the number days of data to include in the PCA calculation.
d Save your changes and close the pca.properties file.
2 Start the PCA tool.
Option Description
Windows host
Open a command prompt and type vcenter-ops\tools\pca\run-
pca.bat.
Linux host
Open a terminal window and type vcenter-ops/tools/pca/run-
pca.sh.
A PCA results file appears in the vcenter-ops\user\conf\analytics directory. The PCA log file contains the
statistics of how many metrics were eliminated. The Analytics service stops calculating dynamic thresholds
for the eliminated metrics.
VMware vCenter Operations Manager Administration Guide
156 VMware, Inc.