How Use /Fastdetect /3GB switch for Utlizing 2G RAM

DB : 10.2.0
OS : Microsoft Server 2003
Processor : 2xDual Core Intel Xeon
Physical Memory : 4G (But showing 3.5G)
i want to configure my databse for utlizing 3g RAM ( using 3gb switch in boot.ini file 1G for OS Kernal and 2G for user related applications proces i.e ORACLE.EXE and lsnrctl etc.
After changing parameter USE_INDIRECT_DATA_BUFFERS=TRUE in init.ora file. what value i have to cinfigure for DB_BLOCK_BUFFERS=XXXXXX
and how i can update registery for AWE_WINDOW_MEMORY
how i adjust SGA and PGA for establishing Aproximatly 400 sessios.
Boot.ini file is as : (it is work or not)
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows Server 2003 " /noexecute=optin /fastdetect /3GB /Userva=3030

You may want to refer to the Metalink Note:
implementing Address Windowing Extensions (AWE) or VLM on Windows Platforms. Note 225349-1
Another good reference can be found at Memory Support and Windows Operating systems
~ Madrid

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Not sure if I got this correctly but...
with standard edition of Windows 2003 and with /3GB switch in place, you made the kernel use 1GB of the 32 bit address space.
With Enterprise edition of Windows 2003 and without /3GB switch in place, kernel will use 2GB which is default.
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pool paged bytes=131460000
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Edited by: user6739264 on Nov 2, 2008 3:40 AM

thank you for replying ....
no im not using raw devices, im using disk & i have plenty of free disk space for the backup,
& i was refering to the
O/S-Error: (OS 1450) Insufficient system resources exist to complete the requested service.
error
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this is a new db server configured with 12 gb of ram that's why we're using AWE
& THE PROBLEM NEVER HAPPENED WITH THE OLD SERVER where manual memory management & only 4 gb of ram were in use.

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How Use /Fastdetect /3GB switch for Utlizing 2G RAM

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