How to find whether /3GB switch is in effect

[Guest Prem Mehrotra]

I have Windows Server 2000. My Windows SA has added /3GB switch in boot.ini

which will go in effect next time server is rebooted.

 

How do I verify that memory available to Applications is now 3GB while

memory available to Windows OS is 1GB (instead of 2GB). When I look in

taskmgr, I do not see anywhere that memory avaiable to applications is 2GB

and to Windows OS is 2GB. Is there some system log file I can look to verify

this.

 

 

Thanks a lot,

Prem

[Guest John John]

Re: How to find whether /3GB switch is in effect

 

That switch isn't supported by Server 2000. You need Windows 2000

Advanced Server or Server 2003 to properly use the switch. On Advanced

Server when using the switch you may deplete the system page table

entries (PTEs) and you may need to make adjustments via the registry.

 

The switch isn't supported on Server 2000 because it only supports 4GB

RAM. Setting the 3/GB switch will create false memory addresses above

the 4GB boundary and this may cause applications to crash if they try to

access this false memory.

 

Why did your SA set this switch? What is he hoping to accomplish? Are

you running Exchange Server and does the machine have more that 1GB RAM?

Your SA should have done his homework and done more research before

blindly setting this switch on Server 2000.

 

John

 

Prem Mehrotra wrote:

> I have Windows Server 2000. My Windows SA has added /3GB switch in boot.ini

> which will go in effect next time server is rebooted.

>

> How do I verify that memory available to Applications is now 3GB while

> memory available to Windows OS is 1GB (instead of 2GB). When I look in

> taskmgr, I do not see anywhere that memory avaiable to applications is 2GB

> and to Windows OS is 2GB. Is there some system log file I can look to verify

> this.

>

>

> Thanks a lot,

> Prem

[Guest Prem Mehrotra]

Re: How to find whether /3GB switch is in effect

 

My sever is Windows 2000 Advanced Server. Sorry, I did not specify it

earlier. Anyway, where does not look to find how much memory is avaiable to

application.

 

 

"John John" wrote:

> That switch isn't supported by Server 2000. You need Windows 2000

> Advanced Server or Server 2003 to properly use the switch. On Advanced

> Server when using the switch you may deplete the system page table

> entries (PTEs) and you may need to make adjustments via the registry.

>

> The switch isn't supported on Server 2000 because it only supports 4GB

> RAM. Setting the 3/GB switch will create false memory addresses above

> the 4GB boundary and this may cause applications to crash if they try to

> access this false memory.

>

> Why did your SA set this switch? What is he hoping to accomplish? Are

> you running Exchange Server and does the machine have more that 1GB RAM?

> Your SA should have done his homework and done more research before

> blindly setting this switch on Server 2000.

>

> John

>

> Prem Mehrotra wrote:

>

> > I have Windows Server 2000. My Windows SA has added /3GB switch in boot.ini

> > which will go in effect next time server is rebooted.

> >

> > How do I verify that memory available to Applications is now 3GB while

> > memory available to Windows OS is 1GB (instead of 2GB). When I look in

> > taskmgr, I do not see anywhere that memory avaiable to applications is 2GB

> > and to Windows OS is 2GB. Is there some system log file I can look to verify

> > this.

> >

> >

> > Thanks a lot,

> > Prem

>