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Spotlight on SQL Server Enterprise 11.7 - Management Pack for SCOM User Guide

Windows Server | Home Page | CPU Panel

Component Description

CPUs

Number of processors installed.

Speed

Speed of the processor(s) installed.

Type

Type of processor(s) installed (Intel Pentium III, for example).

Up Time

Shows how long it has been since Windows was started.

Virtualization Overhead

In a virtual environment the physical CPU of a host is shared by virtual machines and the hypervisor. Multiple processes may want to use the physical CPU of the host at the same time. The virtual machines may have to wait to be scheduled on a CPU.

Display Description

Gauge

Show the percentage of CPU that is unavailable to this virtual machine because it is being consumed either by other virtual machines or by VMware itself. The amount of ready time is shown as a percentage of the theoretical maximum CPU available to the virtual machine.

Applicable to Windows Servers hosted on VMware.

Wait Time in nanoseconds

Show the average time the virtual machine spent waiting for CPU over the collection interval (average 5 minutes). The average wait time should remain under 60,000ns. If the average wait time exceeds 60,000ns then a Hyper-V CPU wait time per dispatch alarm is raised. A high alarm is raised if the average wait time exceeds 100,000ns. See also Windows Server | CPU Drilldown

The Hyper-V - Virtual Overhead alarm is raised on excessive CPU being used by the hypervisor on this virtual machine.

Applicable to Windows Servers hosted on Hyper-V.

Not Virtualized

The Windows Server is not hosted on a virtual machine or the virtual machine is unknown. For more information, see Windows Server | Connection Details.

CPU Usage

Represents the total amount of CPU being used on the Windows server. It includes CPU consumed by all windows processes.

This component spins faster as CPU demands increase.

Queue Length

Shows the number of threads (program execution units) that are waiting on all processors to be run. A sustained processor queue length greater than ten can indicate processor congestion.

Processes

Shows the number of applications and services that are currently active on the system.)

Threads

Shows the number of threads currently active in all processes.

A thread is a running portion of the owning process. Every process has at least one thread.

 

Data Flows

Component Description

pages/s

Shows the number of memory pages per second that are being written to disk from physical memory, in order to free up physical memory.

The memory pages are checked first to see if they have been modified - if no modification has taken place, they are discarded.

pg faults/s

This is a measure of the number of page faults per second on the system. This value includes soft faults and hard faults.

A page fault occurs when a process requires code or data that is not in its space in physical memory.

A soft fault is when a memory page is not in the physical memory of the process, but resides in another segment of physical memory.

A hard fault occurs when a memory page is not in the physical memory of the process, and has to be brought from disk.

Cache writes/s

Shows the rate at which cache pages are written to disk from memory, in order to satisfy a write through request (an application request to not write information to cache, but directly to disk) or a cache flush (a regular writing of data from the write-cache to disk).

Cache reads/s

Shows the rate at which cache pages are read by applications from memory.

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