PowerShell/Docs/check-swap-space.md

check-swap-space.ps1

This PowerShell script queries the status of the swap space and prints it.

Parameters

PS> ./check-swap-space.ps1 [[-MinLevel] <Int32>] [<CommonParameters>]

-MinLevel <Int32>
    Specifies the minimum level (10 GB by default)
    
    Required?                    false
    Position?                    1
    Default value                10
    Accept pipeline input?       false
    Accept wildcard characters?  false

[<CommonParameters>]
    This script supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction, 
    WarningVariable, OutBuffer, PipelineVariable, and OutVariable.

Example

PS> ./check-swap-space.ps1
✅ Swap space with 1GB at 42%, 748MB free

Notes

Author: Markus Fleschutz | License: CC0

Related Links

https://github.com/fleschutz/PowerShell

Script Content

<#
.SYNOPSIS
	Checks the swap space status
.DESCRIPTION
	This PowerShell script queries the status of the swap space and prints it.
.PARAMETER MinLevel
	Specifies the minimum level (10 GB by default)
.EXAMPLE
	PS> ./check-swap-space.ps1
	✅ Swap space with 1GB at 42%, 748MB free
.LINK
	https://github.com/fleschutz/PowerShell
.NOTES
	Author: Markus Fleschutz | License: CC0
#>

param([int]$MinLevel = 10) # minimum level in GB

function MB2String { param([int64]$Bytes)
        if ($Bytes -lt 1000) { return "$($Bytes)MB" }
        $Bytes /= 1000
        if ($Bytes -lt 1000) { return "$($Bytes)GB" }
        $Bytes /= 1000
        if ($Bytes -lt 1000) { return "$($Bytes)TB" }
        $Bytes /= 1000
        if ($Bytes -lt 1000) { return "$($Bytes)PB" }
        $Bytes /= 1000
        if ($Bytes -lt 1000) { return "$($Bytes)EB" }
}

try {
	[int]$Total = [int]$Used = [int]$Free = 0
	if ($IsLinux) {
		$Result = $(free --mega | grep Swap:)
		[int]$Total = $Result.subString(5,14)
		[int]$Used = $Result.substring(20,13)
		[int]$Free = $Result.substring(32,11)
	} else {
		$Items = Get-WmiObject -class "Win32_PageFileUsage" -namespace "root\CIMV2" -computername localhost 
		foreach ($Item in $Items) { 
			$Total = $Item.AllocatedBaseSize
			$Used = $Item.CurrentUsage
			$Free = ($Total - $Used)
		} 
	}
	if ($Total -eq 0) {
        	Write-Output "⚠️ No swap space configured"
	} elseif ($Free -eq 0) {
		Write-Output "⚠️ Swap space with $(MB2String $Total) is full"
	} elseif ($Free -lt $MinLevel) {
		Write-Output "⚠️ Swap space with $(MB2String $Total) is nearly full, only $(MB2String $Free) free"
	} elseif ($Used -eq 0) {
		Write-Output "✅ Swap space with $(MB2String $Total) reserved"
	} else {
		[int]$Percent = ($Used * 100) / $Total
		if ($Percent -ge 90) {
			Write-Output "✅ Swap space with $(MB2String $Total) is $Percent% full, $(MB2String $Free) free"
		} else {
			Write-Output "✅ Swap space with $(MB2String $Total) at $Percent%, $(MB2String $Free) free"
		}
	}
	exit 0 # success
} catch {
	"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
	exit 1
}

(generated by convert-ps2md.ps1 using the comment-based help of check-swap-space.ps1 as of 08/06/2023 21:36:06)