Added new blog post (#60)

content/posts/2023-05-01-use-powershell-to-monitor-system-performance.md

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+---
+categories:
+  - PowerShell
+date: 2023-05-01T11:15:00+01:00
+draft: false
+lastMod: 2023-05-01T11:15:00+01:00
+tags:
+  - PowerShell
+title: Use PowerShell to monitor system performance
+---
+
+In this post, I'll show you how to monitor system performance using PowerShell.
+I'll introduce you to a few different cmdlets and some examples of how you
+might use them to monitor the performance of a system.
+
+## `Get-Process`
+
+This cmdlet provides information about all of the running processes on a
+system, including their process ID, their CPU usages, and their memory usage.
+
+You might use this cmdlet to:
+
+- Get the five processes using the most CPU:
+`Get-Process | Sort-Object -Property CPU | Select-Object Name,CPU -Last 5`.
+- Get the five processes using the most memory:
+`Get-Process | Sort-Object -Property WorkingSet | Select-Object Name,WorkingSet -Last 5`
+- Get the total CPU time of a specific process:
+`(Get-Process -Name msedge).TotalProcessorTime`
+
+## `Get-Counter`
+
+This cmdlet provides information about system performance counters, such as
+CPU, memory, and disk usage.
+
+You might use this cmdlet to:
+
+- Check free space on a drive:
+`(Get-Counter '\LogicalDisk(C:)\% Free Megabytes').CounterSamples.CookedValue/1024`
+- Check the amount of available memory: `Get-Counter '\Memory\Available MBytes'`
+- Check network traffic: `Get-Counter '\Network Interface(*)\Bytes Total/sec'`
+
+## `Get-WmiObject`
+
+This cmdlet provides access to the Windows Management Instrumentation (WMI)
+database, which contains information about system resources.
+
+You might use this cmdlet to:
+
+- Check system uptime:
+`Get-WmiObject -Class Win32_OperatingSystem | Select-Object -Property LastBootUpTime | ForEach-Object {[System.Management.ManagementDateTimeConverter]::ToDateTime($_.LastBootUpTime)} | Select-Object -ExpandProperty DateTime`
+- Check system battery status:
+`Get-WmiObject -Class Win32_Battery | Select-Object -Property BatteryStatus,EstimatedChargeRemaining`
+- Check system fan speeds:
+`Get-WmiObject -Namespace "root\cimv2" -Class "Win32_Fan" | Select-Object -Property DeviceID, CurrentSpeed`
+
+## Further reading
+
+Further information on the `Get-Process` cmdlet can be found on
+[Microsoft Learn](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/get-process).
+
+Further information on the `Get-Counter` cmdlet can be found on
+[Microsoft Learn](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.diagnostics/get-counter).
+
+Further information on the `Get-WmiObject` cmdlet can be found on
+[Microsoft Learn](https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/get-wmiobject).