Cpu Usage - Cisco MCS-7825-H3-IPC1 Service Manual

Chapter 3 Managing and Monitoring the Health of Cisco Unified Communications Manager Systems
The RTMT backend, AMC service, which is up and running as soon as the Cisco Unified CM server is
up and running, collects and processes all the information needed, and notifies you according to how you
configured the notification.
RTMT CPU and memory page reports CPU usage in terms of the following:
•
•
•
•
•

CPU Usage

High CPU utilization can impact the call processing by creating delays or interruptions in the service. It
could affect the end user service. Sometimes high CPU utilization is indicative of a memory leak. RIS
DataCollector PerfMonLog when enabled tracks CPU usage.
Cisco recommends that RIS DataCollector PerfMonLog be enabled.
Note
Table 3-2
Table 3-2
Usage
Total CPU usage—Processor (_Total) \ %
CPU Time
Process ccm CPU
IOWAIT—Processor (_Total) \IOwait
Percentage
CallManager Service Virtual Memory size < 2.1 GB
You can also monitor CPU usage by using APIs. Using the SOAP API, you can monitor the following
perfmon counters:
•
•
Using the SNMP interface, you can monitor the following perfmon counters:
•
•
OL-22523-01
%System—CPU utilization percentage that occurred while executing at the system level (kernel)
%User—CPU utilization percentage that occurred while executing at the user level (application).
%IOWait—CPU percentage of time of idle waiting for outstanding disk I/O request.
%SoftIrq—Percentage of time that the processor is executing deferred IRQ processing (for example,
processing of network packets).
%Irq—Percentage of time that the processor is executing the interrupt request which is assigned to
devices for interrupt or sending a signal to the computer when it is finished processing.
shows CPU usage guidelines.
CPU Usage Guidelines
Under Processor object—% CPU Time, System Percentage, User Percentage, IOwait Percentage,
Softirq Percentage, Irq Percentage
Under Process object—% CPU Time
Host Resource MIB—hrProcessorLoad, hrSWRunPerfCPU
CPQHOST-MIB—cpqHoCpuUtilMin, cpqHoCpuUtilFiveMin
RTMT Monitoring of Cisco Unified CM System Health
MCS-7835
< 68% is good
68–70% triggers a warning
> 80% is bad
< 44%
< 10% is good
Cisco Unified Communications Manager Managed Services Guide
MCS-7845
< 68% is good
68–70% triggers a warning
> 80% is bad
< 22%
< 10% is good
< 2.1 GB
3-13