How CPU Utilization for SystemEDGE is gathered in CA Performance Management
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Article ID: 94283
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Products
CA Infrastructure ManagementCA Performance Management - Usage and Administration
Issue/Introduction
This article defines the current MIB OIDs and Metric Expressions used in CA Performance Management to poll and provide CPU Utilization metric data for SystemEDGE Agents.
How is the CPU Utilization metric data for SystemEDGE agents gathered in CA Performance Management?
Environment
All supported CA Performance Management relkease
Resolution
The CPU Utilization metric data in CAPM represents the data polled every five minutes from the agents MIB data.
The MIB OIDs polled to gather CPU data for a SystemEDGE agent are detailed in the Vendor Certification in use.
The most common Vendor Certification (VC) to get applied for polling SystemEDGE CPU metrics is the "SystemEDGE Processor, LPAR(CPUs)" VC.
The Utilization related Metrics have the following expressions which defines both which MIB OIDs it uses for it's data, and how that data is calculated. The following table shows the current Metrics along with their OIDs & Expressions.
CPU Idle Utilization
cpuStatsIdlePercent
CPU System Utilization
cpuStatsSysPercent
CPU User Utilization
cpuStatsUserPercent
CPU Wait Utilization
cpuStatsWaitPercent
Utilization
cpuStatsUserPercent+cpuStatsSysPercent
The OIDs related to CPU Utilization metric data are defined in the SystemEDGE MIB as follows:
CPU Table Details (all OIDs defined under the same table)
DESCRIPTION: "The percentage of time (over the sample period) that the system's CPU was waiting for I/O. This object may not be supported by the underlying operating system."
::= { cpuStatsEntry 11 }
CA Performance Manager polls these OIDs every five minutes by default. It takes the values it receives from the device, in response to its request for those OIDs values. It then uses that data to provide the metric data in reports upon request.