Knowledge Base

CounterId

PerfCounterInfo

groupInfo

nameInfo

rollupType

statsType

unitInfo

To ensure that you have a unique counter ID and name across the possible ESX Server and VirtualCenter versions you are running, include the rollupType value in your counter definition:

groupInfo.key:nameInfo.key:rollupType

This provides a unique value that can be mapped to an individual counter. For example:

my $perfCounterInfo = $perfmgr_view->perfCounter;

foreach (@$perfCounterInfo) {

my $key = $_->key; # index

my $groupName = $_->groupInfo->key; # cpu

my $counterName = $_->nameInfo->key; # usageMhz

my $rollupType = $_->rollupType->val; # average

my $statsType = $_->statsType->val; # type of value

print $key, ":",

join (".", $groupName, $counterName,$rollupType),

"(", $statsType, ")\n";

}

For more information, see http://www.vmware.com/vmtn/technology/developer/webinars/vi-api-performance-mgmt_webcast_2006-11-15.pdf%20page%2021 . It describes how to identify a counter uniquely.