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Context Switches/sec is the combined rate at which all processors on the computer are switched from one thread to another.
Context switches occur when a running thread voluntarily relinquishes the processor, is preempted by a higher priority ready thread, or switches between user-mode and privileged (kernel) mode to use an Executive or subsystem service.
It is the sum of Thread\\Context Switches/sec for all threads running on all processors in the computer and is measured in numbers of switches.
There are context switch counters on the System and Thread objects. This counter displays the difference between the values observed in the last two samples, divided by the duration of the sample interval.

Processor DPC time is the time that a single processor spent receiving and servicing deferred procedure
calls (DPCs). DPCs are interrupts that run at a lower priority than standard interrupts. % DPC Time is a
component of % Privileged Time because DPCs are executed in privileged mode. If a high % DPC Time is
sustained, there may be a processor bottleneck or an application or hardware related issue that can
significantly diminish overall system performance.

The Processor Information\% Interrupt Time is the time the processor spends receiving and servicing
hardware interrupts during sample intervals. This value is an indirect indicator of the activity of
devices that generate interrupts, such as the system clock, the mouse, disk drivers, data communication
lines, network interface cards and other peripheral devices. This is an easy way to identify a potential
hardware failure. This should never be higher than 20%.

The Processor Information\% Privileged Time counter shows the percent of time that the processor is spent
executing in Kernel (or Privileged) mode. Privileged mode includes services interrupts inside Interrupt
Service Routines (ISRs), executing Deferred Procedure Calls (DPCs), Device Driver calls and other kernel-mode
functions of the Windows® Operating System.

The Processor Queue Length shows the number of threads that are observed as delayed in the processor Ready Queue
and are waiting to be executed.

The Processor Information\% User Time counter shows the percent of time that the processor(s) is spent executing
in User mode.

CPU utilization in %

The number of logical processors available on the computer.

The number of processes.

The number of threads used by all running processes.

System description of the host.

System local time of the host.

System host name.

Operating system architecture of the host.

Cache Bytes is the sum of the Memory\\System Cache Resident Bytes, Memory\\System Driver Resident Bytes,
Memory\\System Code Resident Bytes, and Memory\\Pool Paged Resident Bytes counters. This counter displays
the last observed value only; it is not an average.

The free space of swap volume/file in percent.

This indicates the number of page table entries not currently in use by the system. If the number is less
than 5,000, there may well be a memory leak or you running out of memory.

Page Faults/sec is the average number of pages faulted per second. It is measured in number of pages
faulted per second because only one page is faulted in each fault operation, hence this is also equal
to the number of page fault operations. This counter includes both hard faults (those that require
disk access) and soft faults (where the faulted page is found elsewhere in physical memory.) Most
processors can handle large numbers of soft faults without significant consequence. However, hard faults,
which require disk access, can cause significant delays.

This measures the rate at which pages are read from or written to disk to resolve hard page faults.
If the value is greater than 1,000, as a result of excessive paging, there may be a memory leak.

This measures the size, in bytes, of the non-paged pool. This is an area of system memory for objects
that cannot be written to disk but instead must remain in physical memory as long as they are allocated.
There is a possible memory leak if the value is greater than 175MB (or 100MB with the /3GB switch).
A typical Event ID 2019 is recorded in the system event log.

Total memory in Bytes

The total space of swap volume/file in bytes.

Used memory in Bytes

The used space of swap volume/file in percent.

The agent always returns 1 for this item. It could be used in combination with nodata() for availability check.

System uptime in 'N days, hh:mm:ss' format.

Monitoring agent availability status

Raw data of win32_networkadapter.