PageFile.sys batch script

Hello,
I need help writing a batch script that would configure Windows Virtual Memory based on the amount of RAM installed

If you have 4 GB of RAM, set virtual memory to 8 GB (Custom size: set both initial and maximum size to 8192)
If you have 8 GB of RAM, set virtual memory to 16 GB (Custom size: set both initial and maximum size to 16384).
If you have 16 GB of RAM, set virtual memory also to 16 GB (Custom size: set both initial and maximum size to 16384)
If you have 32 GB of RAM, set virtual memory also to 8 GB (Custom size: set both initial and maximum size to 8192) just in case.

This virtual memory setting forces specific software on many computers

Thank you very much for help

Can you post your current code and what isn't working or don't you have anything at all?

This could be of your interest:
How to change virtual memory size on Windows 10 | Windows Central

I don't have the code because I haven't written anything in batch for several years

I associate which registry key is responsible for a given function, but detecting the amount of memory is a bit more complicated

I think I can make a batch file like this. Does it matter if it would have to be run as admin?
Also I don't know if I got your logic right, what about the values between this memory sizes?

7 GB or less = Initial 8 GB - Max 8 GB
8 GB - 31 GB = Initial 16 GB - Max 16 GB
32 GB or More = Initial 8 GB - Max 8 GB

Is that right?

ricardobohner said:

I think I can make a batch file like this. Does it matter if it would have to be run as admin?
Also I don't know if I got your logic right, what about the values between this memory sizes?

7 GB or less = Initial 8 GB - Max 8 GB
8 GB - 31 GB = Initial 16 GB - Max 16 GB
32 GB or More = Initial 8 GB - Max 8 GB

Is that right?

That's exactly what the file is about

any file i wont run with administrator privileges from old windows xp anyway

Made some testing with a computer with 6 GB and a computer with 12 GB, don't have a PC with 32 or more memory:



Here is the code:

Code:

@echo off

:: If you have 4 GB of RAM, set virtual memory to 8 GB (Custom size: set both initial and maximum size to 8192)
:: If you have 8 GB of RAM, set virtual memory to 16 GB (Custom size: set both initial and maximum size to 16384).
:: If you have 16 GB of RAM, set virtual memory also to 16 GB (Custom size: set both initial and maximum size to 16384)
:: If you have 32 GB of RAM, set virtual memory also to 8 GB (Custom size: set both initial and maximum size to 8192) just in case.

net session >nul 2>&1 || (powershell start -verb runas '"%~0"' &exit /b)
for /f %%a in ('"prompt $H&for %%b in (1) do rem"') do set "BS=%%a"
set /a Memory=0
for /f "Delims=" %%a in ('wmic memorychip get capacity /value') do for /f "tokens=2 delims==" %%b in ("%%~a") do call :MemoryCalculator "%%~b"

wmic computersystem where name="%computername%" set AutomaticManagedPagefile=false > nul 2> nul

IF %Memory% LEQ 7 goto :7GBOrLess
IF %Memory% LEQ 31 goto :8to31GB
IF %Memory% GEQ 32 goto :32GBOrMore

:7GBOrLess
cls
echo.
echo  You have %Memory% GB of memory! Changing your Pagefile to Initial: 8 GB - Max: 8 GB ...
timeout /t 5 > nul
wmic pagefileset where name="C:\\pagefile.sys" set InitialSize=8192,MaximumSize=8192 > nul 2> nul
goto :End

:8to31GB
cls
echo.
echo  You have %Memory% GB of memory! Changing your Pagefile to Initial: 16 GB - Max 16 GB ...
timeout /t 5 > nul
wmic pagefileset where name="C:\\pagefile.sys" set InitialSize=16384,MaximumSize=16384 > nul 2> nul
Goto :End

:32GBOrMore
cls
echo.
echo  You have %Memory% GB of memory! Changing your Pagefile to Initial: 8 GB - Max 8 GB ...
timeout /t 5 > nul
wmic pagefileset where name="C:\\pagefile.sys" set InitialSize=16384,MaximumSize=8192 > nul 2> nul
goto :End

:End
cls
echo.
echo  For the changes to take effect you must restart your computer!
echo.
echo  [R]estart now
echo.
echo  [L]ater
echo.
set /p "Option=%BS% Option: "
IF /i "%Option%"=="R" shutdown -r -t 30
exit

:MemoryCalculator
for /f "Delims=" %%a in ('powershell %1 /1024 /1024 /1024') do set /a Memory=%Memory% + %%a
goto :EOF

With this batch script you can set virtual memory size to a static amount twice the installed RAM size.

You don't really want to run unsigned scripts or certificates up to 2025 that are not microsoft