Problem with the proper functioning of the script - powershell

Question

I have a request if anyone could help find a bug in setting the virtual memory by the script, if you have less than 8GB of ram, the script instead of setting 8GB goes to setting the variant for 16GB of operating memory
$Result = (Get-CimInstance -ClassName Win32_PhysicalMemory | Measure-Object -Property Capacity -Sum).Sum / 1GB
$DriveLetter = (Get-CimInstance -ClassName Win32_Volume | Where-Object -FilterScript {$_.PageFilePresent}).DriveLetter[0]
switch ($Result)
{
{$PSItem -le 7}
{
Write-Verbose "Masz $($PSItem) GB pamięci! Zmiana pliku stronicowania na poczatkowy: 8 GB - maks .: 8 GB" -Verbose
Start-Sleep -Seconds 5
Get-CimInstance -ClassName Win32_ComputerSystem | Set-CimInstance -Property #{AutomaticManagedPageFile = $false}
Get-CimInstance -ClassName Win32_PageFileSetting | Where-Object -FilterScript {$_.SettingID -eq "pagefile.sys # $($DriveLetter):"} | Set-CimInstance -Property #{
InitialSize = 8192
MaximumSize = 8192
}
}
{$PSItem -le 31}
{
Write-Verbose "Masz $($PSItem) GB pamięci! Zmiana pliku stronicowania na poczatkowy: 16 GB - Max 16 GB" -Verbose
Start-Sleep -Seconds 5
Get-CimInstance -ClassName Win32_ComputerSystem | Set-CimInstance -Property #{AutomaticManagedPageFile = $false}
Get-CimInstance -ClassName Win32_PageFileSetting | Where-Object -FilterScript {$_.SettingID -eq "pagefile.sys # $($DriveLetter):"} | Set-CimInstance -Property #{
InitialSize = 16384
MaximumSize = 16384
}
}
{$PSItem -ge 32}
{
Write-Verbose "Masz $($PSItem) GB pamięci! Zmiana pliku stronicowania na poczatkowy: 8 GB - Max 8 GB" -Verbose
Start-Sleep -Seconds 5
Get-CimInstance -ClassName Win32_ComputerSystem | Set-CimInstance -Property #{AutomaticManagedPageFile = $false}
Get-CimInstance -ClassName Win32_PageFileSetting | Where-Object -FilterScript {$_.SettingID -eq "pagefile.sys # $($DriveLetter):"} | Set-CimInstance -Property #{
InitialSize = 8192
MaximumSize = 8192
}
}
}

Answer 1

I don't see any break on your switch statement, all possibilities are being evaluated without a break. By the way, you say lower than 8 yet in your statement I see lower or equal to 7. In any case, suppose you have 4Gb of RAM, with your statement you would enter into the first condition because 4 is lower or equal to 7 and you would also enter into the second condition because 4 is lower or equal to 31.
When working with switch just remember, it's very important to use breaks if you don't want to keep evaluating the following conditions.
Try the code below with and without break and see what happens:
$eval=4
switch($eval)
{
{$_ -le 7}
{
"$_ is lower or equal to 7"
break
}
{$_ -le 31}
{
"$_ is lower or equal to 31"
break
}
Default
{
"$_ is higher than 31"
}
}