PowerShell/docs/check-swap-space.md

Script: *check-swap-space.ps1*
========================

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

Parameters
----------
```powershell
/home/markus/Repos/PowerShell/scripts/check-swap-space.ps1 [[-minLevel] <Int32>] [<CommonParameters>]

-minLevel <Int32>
    Specifies the minimum level in MB (10 MB 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
-------
```powershell
PS> ./check-swap-space.ps1
✅ Swap space uses 1GB (21%) of 5GB

```

Notes
-----
Author: Markus Fleschutz | License: CC0

Related Links
-------------
https://github.com/fleschutz/PowerShell

Script Content
--------------
```powershell
<#
.SYNOPSIS
	Checks the swap space
.DESCRIPTION
	This PowerShell script queries the current status of the swap space and prints it.
.PARAMETER minLevel
	Specifies the minimum level in MB (10 MB by default)
.EXAMPLE
	PS> ./check-swap-space.ps1
	✅ Swap space uses 1GB (21%) of 5GB
.LINK
	https://github.com/fleschutz/PowerShell
.NOTES
	Author: Markus Fleschutz | License: CC0
#>

param([int]$minLevel = 10)

function MB2String { param([int64]$bytes)
        if ($bytes -lt 1024) { return "$($bytes)MB" }
        $bytes /= 1024
        if ($bytes -lt 1024) { return "$($bytes)GB" }
        $bytes /= 1024
        if ($bytes -lt 1024) { return "$($bytes)TB" }
        $bytes /= 1024
        if ($bytes -lt 1024) { return "$($bytes)PB" }
        $bytes /= 1024
        if ($bytes -lt 1024) { return "$($bytes)EB" }
}

try {
	
	if ($IsLinux) {
		$Result = $(free --mega | grep Swap:)
		[int64]$total = $Result.subString(5,14)
		[int64]$used = $Result.substring(20,13)
		[int64]$free = $Result.substring(32,11)
	} else {
		$items = Get-WmiObject -class "Win32_PageFileUsage" -namespace "root\CIMV2" -computername localhost 
		[int64]$total = [int64]$used = 0
		foreach ($item in $items) { 
			$total += $item.AllocatedBaseSize
			$used += $item.CurrentUsage
			
		}
		[int64]$free = ($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 has only $(MB2String $free) of $(MB2String $total) left!"
	} elseif ($used -lt 3) {
		Write-Output "✅ Swap space has $(MB2String $total) reserved"
	} else {
		[int64]$percent = ($used * 100) / $total
		Write-Output "✅ Swap space uses $(MB2String $used) ($percent%) of $(MB2String $total)"
	}
	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 11/08/2024 12:34:47)*