When do I need to use the /3gb switch? or the /3gb /userva=3030?

read somewhere that I need /3gb only when my box has between 1gb to 4gb
physical memory only.

anything above 4gb I do not need any switches.


this is on a virtual machine

Hi,

Please read:
http://blogs.msdn.com/oldnewthing/ar...05/208908.aspx

You don't use the switch if you have <3GB.

--
Jabez Gan
Microsoft MVP: Windows Server
http://www.msblog.org


"tdubb" <tdubb123@gmail.com> wrote in message
news:eq0sXSpnIHA.3400@TK2MSFTNGP03.phx.gbl...
> When do I need to use the /3gb switch? or the /3gb /userva=3030?
>
> read somewhere that I need /3gb only when my box has between 1gb to 4gb
> physical memory only.
>
> anything above 4gb I do not need any switches.
>
>
> this is on a virtual machine
>

I have a virtual machine assigned 4GB of memory. However when I ass the /3gb
/userva=3030 switch to boot.ini, the performance is very slow.

when i take the switch out it is working fine.

The machine is windows 2003 and nothing running on it
"Jabez Gan [MVP]" <mingteikg@blizNOSPAMhosting.com> wrote in message
news:BC2781D5-4B04-405E-89DB-ED507E68DBB5@microsoft.com...
> Hi,
>
> Please read:
> http://blogs.msdn.com/oldnewthing/ar...05/208908.aspx
>
> You don't use the switch if you have <3GB.
>
> --
> Jabez Gan
> Microsoft MVP: Windows Server
> http://www.msblog.org
>
>
> "tdubb" <tdubb123@gmail.com> wrote in message
> news:eq0sXSpnIHA.3400@TK2MSFTNGP03.phx.gbl...
>> When do I need to use the /3gb switch? or the /3gb /userva=3030?
>>
>> read somewhere that I need /3gb only when my box has between 1gb to 4gb
>> physical memory only.
>>
>> anything above 4gb I do not need any switches.
>>
>>
>> this is on a virtual machine
>>
>

>I have a virtual machine assigned 4GB of memory. However when I ass the /3gb
>/userva=3030 switch to boot.ini, the performance is very slow.
>
>when i take the switch out it is working fine.

Maybe because it's a virtual machine.

- Thee Chicago Wolf

tdubb wrote:
> When do I need to use the /3gb switch? or the /3gb /userva=3030?
>
> read somewhere that I need /3gb only when my box has between 1gb to 4gb
> physical memory only.
>
> anything above 4gb I do not need any switches.
>
>
> this is on a virtual machine
>
>
Any service on the machine(SQL, Exchange....)

none. nothing at all. running w2k3 sp1 and all hotfixes.

4GB ram assigned and /3GB /userva=3030 switch very slow performance
"Filipe Matias" <filipe.matias@unitek.pt> wrote in message
news:%23iBRcWxnIHA.3780@TK2MSFTNGP06.phx.gbl...
> tdubb wrote:
>> When do I need to use the /3gb switch? or the /3gb /userva=3030?
>>
>> read somewhere that I need /3gb only when my box has between 1gb to 4gb
>> physical memory only.
>>
>> anything above 4gb I do not need any switches.
>>
>>
>> this is on a virtual machine
> Any service on the machine(SQL, Exchange....)