Hardware
Introduction Copied
Geneos Hardware Plug-in monitors the major operating system and hardware resource settings of a host. From the main window it is possible to drill down to a snapshot view of the top 20 processes or all processes running on a host.
See also:
- UNIVERSAL CPU plug-in for detailed monitoring of multiple CPUs
- UNIVERSAL DISK plug-in for monitoring Disk partitions
- UNIVERSAL NETWORK for detailed monitoring of the Network Cards on the host
Views Copied
View (Windows) Copied
View (Linux) Copied
Table Legend
Note
Fields that are not applicable or whose values are not available in a particular platform will showNA
orN/A
.
Name | Description | ||||||||||||||||||
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coresPerCPU |
The number of cores per CPU in the system. If this information cannot be extracted from the system, On Linux, the value is obtained with the following command: # grep "cpu cores" /proc/cpuinfo On Windows, the value is obtained with the following command: WMIC CPU Get DeviceID,NumberOfCores,NumberOfLogicalProcessors |
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cpuClockSpeed | CPU clock speed is measured in megahertz (MHz). It displays the maximum speed frequency of the first CPU found by Netprobe. On Linux, the value is obtained with the following command: # lscpu | grep "MHz" On Windows, the CPU speed is displayed in the Processor field under the Device specifications. To view the device specifications, open the Control Panel > System and Security > System. |
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cpuUtilisation |
A moving average of the previous five samples of CPU utilisation, unless cpuSmoothing is set to false, see cpuSmoothing. Where the host has multiple CPUs, the value shown is the average utilisation of all CPUs. Once
On IBM AIX, the |
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hostid |
Numeric identifier for the host. On Linux, the value is obtained with the following command: # hostid On Windows, the value is displayed as ipconfig /all |
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hostname | The name of the host. | ||||||||||||||||||
hyperThreadingStatus | Shows if HyperThreading is enabled in the system. If this information cannot be extracted from the system, NA is shown instead. | ||||||||||||||||||
lastRebootTime | The day, month, date, time (hh:mm:ss), year | ||||||||||||||||||
memoryIdle |
On Linux, this is the remaining amount of physical memory available. This does not consider the memory used as file buffers or as cache memory. This is computed as:
On Windows, this is the available physical memory that can be reused immediately. On IBM AIX, this is the free real memory. This is computed as:
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memoryIdlePercent | The percentage of idle memory which is computed as (memoryIdle / totalPhysicalMemory) x 100. | ||||||||||||||||||
memoryUse |
Caution: The computation for this metric has changed for Linux platforms in Geneos 5.x. The memory available may look different in older Geneos versions.
The amount of physical memory currently being used. On Linux
On Linux with procps versions 3.3.10 and above, this is computed as:
The On IBM AIX, memoryUse displays the active virtual pages in MB. This is computed as:
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memoryUsedPercent | The percentage of used memory which is computed as (memoryUse / totalPhysicalMemory) x 100. | ||||||||||||||||||
memoryCached | The amount of physical RAM, in kilobytes, used as cache memory. This field is only available in Linux platforms. | ||||||||||||||||||
memoryBuffers | The amount of physical RAM, in kilobytes, used for file buffers. This field is only available in Linux platforms. | ||||||||||||||||||
memoryAvailable |
Caution: The computation for this metric has changed for Linux platforms in Geneos 5.x. The memory available may look different in older Geneos versions.
On Linux platforms, this is the available memory for allocating to the user space, without causing swapping. This metric is taken from On Windows and IBM AIX, this is equal to memoryIdle. |
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memoryAvailablePct | The percentage of available memory which is computed as (memoryAvailable / totalPhysicalMemory) x 100. | ||||||||||||||||||
numPhysicalCPUs | Number of physical CPUs in the system. | ||||||||||||||||||
OS | Details of the Operating System of the host. | ||||||||||||||||||
paging |
The metric includes paging in and paging out, depending on the platform:
Calculation for Linux platforms Over a sampling interval,
Where:
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systemModel |
Displays the make and model of the Windows machine. On Windows. this is obtained through Windows Management Instrumentation (WMI) with the following command:
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systemType |
Displays the system type of the Windows machine. On Windows. this is obtained through Windows Management Instrumentation (WMI) with the following command:
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swapSize |
The total disk-backed swap space available. On Linux, the value is obtained from On Windows, the value is obtained from On IBM AIX, the value is obtained with the following command: $ lsps -s |
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swapUsed | Percentage of available disk-backed swap space in use. | ||||||||||||||||||
timeDifference |
The difference in seconds between the Gateway host and the monitored host. We recommend that you use NTP and NTP-related fields, such as Note: A number of factors can
introduce a margin of error to this time
difference (for example, queues on the Gateway,
queues on the Netprobe, network latency, and so on).
Therefore, be mindful of treating
small fluctuations in this value as being
significant. You may also wish to use a
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timeSyncSource |
Displays the local Network Time Protocol (NTP) service being used by the plugin. When there are multiple sources available, the Hardware plugin uses the first successfully retrieved value. The metric value is fetched in the following order:
This requires that the applicable external process is accessible to the Netprobe. For example, the location is specified in the Notes:
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timeSyncOffset |
Displays the time difference (in milliseconds) between the local clock of the monitored host and the reference clock as reported by the local NTP service. Notes:
We recommend that you use NTP and NTP-related fields, as these provide a more accurate measurement of time. |
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timezone | The timezone code. | ||||||||||||||||||
totalPhysicalMemory | Total RAM in the host. | ||||||||||||||||||
totalProcesses | The total number of processes running. | ||||||||||||||||||
uptime | Elapsed time in days since last system re-boot. | ||||||||||||||||||
vendor |
The hardware or hypervisor vendor of the system. This field is only available on Linux and Windows platforms where the Netprobe runs with root and administrator privileges, respectively. On Linux, this is obtained through Desktop Management Interface (DMI) with the following command: # dmidecode -s system-manufacturer On Windows, this is obtained through Windows Management Instrumentation (WMI) with the following command: C:\Users\Administrator>wmic path Win32_ComputerSystem |
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zombieProcesses |
The number of zombie processes. This field is only included for non-Windows platforms. The value is obtained with the following command: # ps -ax | egrep ' Z.? ' | wc -l |
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Commands Copied
The following commands are available from the context-sensitive menu:
Command | Description |
---|---|
Top 20 Processes | Shows a snapshot of the usage of each CPU on the box, along with information about the top 20 processes, sorted by CPU usage. |
All Processes | Shows a snapshot of the usage of each CPU on the box, along with information about all the current processes, sorted by CPU usage. |
Example Output Copied
Suggested Possible Rules Copied
Here are some examples of rules that you might choose to use with this plugin
Monitoring the swapUsed field Copied
if value > 95 then severity critical
else if value > 80 then severity warning
else severity ok
endif
Monitoring the cpuUtilisation field Copied
if value > 90 then severity critical
else if value > 80 then severity warning
else severity ok
endif
Monitoring the timeDifference field Copied
if value > 600 or value < -600 then delay 3 samples severity critical
else if value > 300 or value < -300 then delay 3 samples severity warning
else delay 3 samples severity ok
endif
Plug-in Configuration Copied
The following parameters can be configured for this plug-in:
includeSlabMemory Copied
Introduced in Geneos 5.x for Linux platforms.
When this setting is enabled, the computation for memoryUse
includes meminfo 'SReclaimable'
.
Default: true
cpuSmoothing Copied
Controls whether the cpuUtilisation
is shown as a moving average over the last 5 samples or not.
Possible values:
Setting | Description |
---|---|
true |
cpuUtilisation is shown as a moving average over the last 5 samples. |
false |
Every sample is displayed as it comes in. |
Default: true
includeBuffersAndCache Copied
Applicable to Linux platforms.
This deprecated setting changes the behaviour of memoryIdle
and memoryUse
. The table below summarises the behaviour changes based on setting:
Variable | Include Buffers and Cache Setting (Enabled) | Include Buffers and Cache Setting (Disabled) |
---|---|---|
memoryIdle |
Current Free Memory + Cache + File Buffers |
Current Free Memory |
memoryUse |
Currently Used Memory – Cache - File Buffers |
Current Used Memory |
Note
On Linux with procps versions 3.3.10 and above, this setting becomes obsolete. For more information, seememoryUse
andincludeSlabMemory
.
Default: false
How memory is reported on each supported platform Copied
Discovery of memory and swap usage on AIX Copied
On AIX the memory usage is consistent with the “avm” value reported by the vmstat utility. The used memory is the number of active virtual memory pages multiplied by the page size (4 kB). This value is then converted to megabytes for display.
The free memory is the number of free physical pages multiplied by the page size and converted to a megabyte value. This corresponds to the “fre” figure as reported by vmstat. The manual for vmstat states that it is not uncommon for this value to be small, as a large portion of real memory is used as cache for the file system.
The swap space figures shown are consistent with those reported by the lsps utility. To get an equivalent result run “lsps -s” on a command-line.
Discovery of memory and swap usage on Linux Copied
On Linux the memory usage is found through the /proc/meminfo file. This file is maintained by the operating system and contains a number of statistics.
Here’s an example.
total: used: free: shared: buffers: cached:
Mem: 492613632 *438747136 *53866496 0 1437696 311742464
Swap: 1003442176 38862848 964579328
MemTotal: 481068 kB
MemFree: 52604 kB
MemShared: 0 kB
Buffers: 1404 kB
Cached: 304436 kB
Active: 294792 kB
Inact_dirty: 10076 kB
Inact_clean: 972 kB
Inact_target: 76 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 481068 kB
LowFree: 52604 kB
SwapTotal: *979924 kB
SwapFree: *941972 kB
The values with asterisks (*) are the ones used when updating the view. The total memory used and free memory are the memory use and memory idle columns of the view before conversion to megabyte figures.
The same is true of the swap total. The swap used is represented as a percentage of swap total.
Discovery of memory and swap usage on Windows Copied
The operating system is queried directly for the amount of physical memory used. This value is converted to a megabyte value. The free memory is calculated as the total physical memory minus the used physical memory and converted to a megabyte value.