PowerShell Script to set the size of pagefile.sys - powershell

Question

How to set the size of Page File on Windows(pagefile.sys) via PowerShell?

Answer 1

This is how we can update the size of pagefile.sys via PowerShell:
# PowerShell Script to set the size of pagefile.sys
$computersys = Get-WmiObject Win32_ComputerSystem -EnableAllPrivileges;
$computersys.AutomaticManagedPagefile = $False;
$computersys.Put();
$pagefile = Get-WmiObject -Query "Select * From Win32_PageFileSetting Where Name like '%pagefile.sys'";
$pagefile.InitialSize = <New_Value_For_Size_In_MB>;
$pagefile.MaximumSize = <New_Value_For_Size_In_MB>;
$pagefile.Put();
Execute the script as below:
PS> .\update_pagefile_size.ps1;

Answer 2

HERE is the solution
THIS is to set C VOL page file to 16384MB, static and D VOL page file to System managed:
# PowerShell Script to set the size of pagefile.sys
# update_pagefile_size.ps1
$pagefile = Get-WmiObject Win32_ComputerSystem -EnableAllPrivileges
$pagefile.AutomaticManagedPagefile = $false
#$pagefile.put() | Out-Null
Gwmi win32_pagefilesetting | where{$_.caption -like 'C:*'}
$pagefileset = Gwmi win32_pagefilesetting | where{$_.caption -like 'C:*'}
$pagefileset.InitialSize = 16384
$pagefileset.MaximumSize = 16384
$pagefileset.Put() | Out-Null
if((Set-WmiInstance -Class Win32_PageFileSetting -Arguments #{name="C:\pagefile.sys";InitialSize = $pagefileset.InitialSize; MaximumSize = $pagefileset.MaximumSize} -EnableAllPrivileges -Verbose) -icontains "already exists"){
$pagefileset = Gwmi win32_pagefilesetting | where{$_.caption -like 'C:*'}
$pagefileset.Delete()
$pagefileset.InitialSize = 16384
$pagefileset.MaximumSize = 16384
Set-WmiInstance -Class Win32_PageFileSetting -Arguments #{name="C:\pagefile.sys";InitialSize = $pagefileset.InitialSize; MaximumSize = $pagefileset.MaximumSize} -EnableAllPrivileges
Gwmi win32_pagefilesetting | where{$_.caption -like 'C:*'}
}
$pagefileset = Gwmi win32_pagefilesetting | where{$_.caption -like 'D:*'}
$pagefileset.InitialSize = 0
$pagefileset.MaximumSize = 0
$pagefileset.Put() | Out-Null
Gwmi win32_pagefilesetting | where{$_.caption -like 'D:*'}
Set-WmiInstance -Class Win32_PageFileSetting -Arguments #{name="D:\pagefile.sys";InitialSize = 0; MaximumSize = 0} -EnableAllPrivileges | Out-Null
Write-host "Don't forget to reboot"
#shutdown /r /t 120 /c "rebooting to fix pagefile"

Answer 3

Well, to GET the pagefile with Powershell use this function I got from Mike Kanakos: "function-getpagefilessize.ps1", which, for some reason, does not work from the profile as a PS file or PSM file:
Function Get-PageFileInfo {
<#
.Synopsis
Returns info about the page file size of a Windows computer. Defaults to local machine.
.Description
Returns the pagefile size info in MB. Also returns the PageFilePath, PageFileTotalSize, PagefileCurrentUsage,
and PageFilePeakusage. Also returns if computer is using a TempPafeFile and if the machine's pagefile is
managed by O/S (AutoManaged = true) or statically set (AutoManaged = False)
.Example
Get-PageFileInfo -computername SRV01
Returns pagefile info for the computer named SRV01
Computer : SRV01
FilePath : C:\pagefile.sys
AutoManagedPageFile : True
TotalSize (in MB) : 8192
CurrentUsage (in MB) : 60
PeakUsage (in MB) : 203
TempPageFileInUse : False
.Example
Get-PageFileInfo SRV01, SRV02
Returns pagefile info for two computers named SRV01 & DC02.
Computer : SRV01
FilePath : C:\pagefile.sys
AutoManagedPageFile : True
TotalSize (in MB) : 8192
CurrentUsage (in MB) : 60
PeakUsage (in MB) : 203
TempPageFileInUse : False
Computer : SRV02
FilePath : C:\pagefile.sys
AutoManagedPageFile : True
TotalSize (in MB) : 8192
CurrentUsage (in MB) : 0
PeakUsage (in MB) : 0
TempPageFileInUse : False
.Example
Get-PageFileInfo SRV01, SRV02, SRV03 | Format-Table
Returns pagefile info for three computers named SRV01, SRV02 & SRV03 in a table format.
Computer FilePath AutoManagedPageFile TotalSize (in MB) CurrentUsage (in MB) PeakUsage (in MB) TempPageFileInUse
-------- -------- ------------------- ----------------- -------------------- ----------------- -----------------
SRV01 C:\pagefile.sys True 8192 60 203 False
SRV02 C:\pagefile.sys True 13312 0 0 False
SRV03 C:\pagefile.sys True 2432 0 0 False
.Parameter computername
The name of the computer to query. Required field.
.Notes
NAME: Get-PageFileInfo
AUTHOR: Mike Kanakos
Version: v1.1
LASTEDIT: Thursday, August 30, 2018 2:19:18 PM
.Link
#>
[CmdletBinding()]
Param(
[Parameter(Mandatory=$True,ValueFromPipeline=$True)]
[string[]]$ComputerName
)
# Main Part of function
Foreach ($computer in $ComputerName)
{
$online= Test-Connection -ComputerName $computer -Count 2 -Quiet
if ($online -eq $true)
{
$PageFileResults = Get-CimInstance -Class Win32_PageFileUsage -ComputerName $Computer | Select-Object *
$CompSysResults = Get-CimInstance win32_computersystem -ComputerName $computer -Namespace 'root\cimv2'
$PageFileStats = [PSCustomObject]#{
Computer = $computer
FilePath = $PageFileResults.Description
AutoManagedPageFile = $CompSysResults.AutomaticManagedPagefile
"TotalSize(in MB)" = $PageFileResults.AllocatedBaseSize
"CurrentUsage(in MB)" = $PageFileResults.CurrentUsage
"PeakUsage(in MB)" = $PageFileResults.PeakUsage
TempPageFileInUse = $PageFileResults.TempPageFile
} #END PSCUSTOMOBJECT
} #END IF
else
{
# Computer is not reachable!
Write-Host "Error: $computer not online" -Foreground white -BackgroundColor Red
} # END ELSE
$PageFileStats
} #END FOREACH
} #END FUNCTION
#AUTHOR: Mike Kanakos#
But setting the page file then runs into ALL kinds of issues. Like, it gets REAL buggy. IF it is set you can change it, if it is not, you must first set to system managed and then set to something, like 16384/16384 on C and System managed on D:.
I am working on the answer myself, because I need this, and I will get back to ya'll when I get it sorted (amongst my long list of other scripts to do)...
But, ITMT, the function will help. Do a ForEach to a list like this:
remove-item -Force volumeletter:\folder\outputfile.txt
$results = (Get-PageFileInfo -Verbose server1.domain,server2.domain |select * |format-table -AutoSize)
$results |out-file volumeletter:\folder\outputfile.txt -Force ascii
OR you load up the Function in ISE, run it to load into memory and then query each server manually from the PS cmd:
Get-PageFileInfo server1.domain
Computer : server1.domain
FilePath : {C:\pagefile.sys, D:\pagefile.sys}
AutoManagedPageFile : False
TotalSize(in MB) : {16384, 768}
CurrentUsage(in MB) : {88, 62}
PeakUsage(in MB) : {120, 84}
TempPageFileInUse : {False, False}
You will see blanks if you are required to use FQDN...
IF you have the standard system managed the function will give you the usage, and that will tell you if you have to set the static sizes:
Get-PageFileInfo server2.domain
Computer : server2.domain
FilePath : C:\pagefile.sys
AutoManagedPageFile : True
TotalSize(in MB) : 7679
CurrentUsage(in MB) : 1763
PeakUsage(in MB) : 4867
TempPageFileInUse : False

Answer 4

For newer versions of PowerShell:
Starting in PowerShell 3.0, the Get-WmiObject cmdlet has been superseded by Get-CimInstance.
$PageFile = Get-CimInstance -ClassName Win32_PageFileSetting -Filter "Name like '%pagefile.sys'"
$PageFile | Remove-CimInstance
$PageFile = New-CimInstance -ClassName Win32_PageFileSetting -Property #{ Name= "C:\pagefile.sys" }
$PageFile | Set-CimInstance -Property #{ InitialSize = 0; MaximumSize = 0 }
Note: you will need administrator privileges to change the pagefile.