check-swap-space

Checks the swap space

Script

#Requires -Version 5.1

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 -or $IsMacOS) {
		$Result = $(free --mega | grep Swap:)
		[int64]$total = $Result.subString(5,15)
		[int64]$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 of $(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 $percent% of $(MB2String $total) ($(MB2String $free) free)"
	}
	exit 0
} catch {
throw
}

Customize

minLevel int

Specifies the minimum level in MB (10 MB by default)