Relationship b/w sga configuration and boot.ini in windows platforms

Question

hi all,
i have doubt on sga configuration and boot.ini settings.
assume the following configuration's
1.Db is 10g r2.
2.OS is Windows server 2003 ,RAM is 8gb
3.SGA_max_size=4gb,SGA_atrget=4gb
1.For the above settings i must initialize the /3g /PAE in bott.ini file?
2. the boot.ini configuration is optional one?
3. what is criteria to set the /3g /PAE parameter in boot.ini and why?
4. what is advantage and disadvantage of boot.ini
please explain.
Thanks is advance..

Answer 1

Deepak_DBA wrote:
hi,
1.Db is 10g r2.
2.OS is Windows server 2003 ,RAM is 8gb
3.SGA_max_size=4gb,SGA_atrget=4gbfor this configuration no need to set /3g /PAE..
coz in Windows server 2003
When the physical RAM in the system exceeds 16 GB and the /3GB switch is used, the operating system will ignore the additional RAM until the /3GB switch is removed. This is because of the increased size of the kernel required to support more Page Table Entries. The assumption is made that the administrator would rather not lose the /3GB functionality silently and automatically; therefore, this requires the administrator to explicitly change this setting.
The /3GB switch allocates 3 GB of virtual address space to an application that uses IMAGE_FILE_LARGE_ADDRESS_AWARE in the process header. This switch allows applications to address 1 GB of additional virtual address space above 2 GB.
The virtual address space of processes and applications is still limited to 2 GB, unless the /3GB switch is used in the Boot.ini file. The following example shows how to add the /3GB parameter in the Boot.ini file to enable application memory tuning:
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(2)\WINNT
[operating systems]
multi(0)disk(0)rdisk(0)partition(2)\WINNT="????" /3GB
so no need to se the bbot.ini files in your case..
Deepak,
Its not good to quote from a link and not give the entire link.
http://www.microsoft.com/whdc/system/platform/server/PAE/PAEmem.mspx
HTH
Aman....