Cisco MCS-7825-H3-IPC1 Service Guide - Page 113

Chapter 3 Managing and Monitoring the Health of Cisco Unified Communications Manager Systems RTMT Monitoring of Cisco Unified CM System Health 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: • %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. 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. Note Cisco recommends that RIS DataCollector PerfMonLog be enabled. Table 3-2 shows CPU usage guidelines. Table 3-2 CPU Usage Guidelines Usage MCS-7835 Total CPU usage-Processor (_Total) \ % < 68% is good CPU Time 68-70% triggers a warning > 80% is bad Process ccm CPU < 44% IOWAIT-Processor (_Total) \IOwait Percentage < 10% is good CallManager Service Virtual Memory size < 2.1 GB MCS-7845 < 68% is good 68-70% triggers a warning > 80% is bad < 22% < 10% is good < 2.1 GB You can also monitor CPU usage by using APIs. Using the SOAP API, you can monitor the following perfmon counters: • Under Processor object-% CPU Time, System Percentage, User Percentage, IOwait Percentage, Softirq Percentage, Irq Percentage • Under Process object-% CPU Time Using the SNMP interface, you can monitor the following perfmon counters: • Host Resource MIB-hrProcessorLoad, hrSWRunPerfCPU • CPQHOST-MIB-cpqHoCpuUtilMin, cpqHoCpuUtilFiveMin OL-22523-01 Cisco Unified Communications Manager Managed Services Guide 3-13