How to know the amount of RAM Oracle is recognizing on the Server...?

I have 10g Rel 2 running on 4 CPU Win2003 Adv Server, which has 8 GB of RAM, but when I look at the Oracle Ent.Mgr. Host page under 'Configuration' it shows 'Memory Size' as 2048 MB, in fact it shows the correct CPU count and hard disk size. What can be the probable reason?

Hi Gaurav,
'...meanwhile I have millions of inserts which happen as part of cursor loops on to my tables...'
That sets off a massive great alarm bell. This sounds like a very good place to start re-writing SQL. The best way is to do it in one go, instead of looping, do one big
insert into select ...
joins and all go here
If for some reason the logic in the loop is so really complex (and it's got to be very complex to not be able to do this) that it can't be merged, then yes, next best is to do bulk processing.
The fact that the ETL is doing millions of single inserts, which is a very bad practice and should be avoided if at all possible, makes me think that there is another bad practice and none of those inserts are being bound - lack of bind variables! In which case my Wild Assed Guess might not be that far from the mark.
This is something I have observed on 10g, if you set the automatic memory tuning by using sga_target and let Oracle size the shared pool, what it tries to do is extend the shared pool to hold all the SQL you throw at it. Since you then proceed to throw millions of unique SQL at it, this of course doesn't work, but doesn't stop Oracle from trying, ending up with all your memory used for pointless SQL and none for PGA/buffer cache etc.
The implicit assumption with automatic memory tuning is of course that the process has been written correctly!
HTH
Chris

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Hello All,
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Edited by: user1687821 on Feb 23, 2012 12:02 AM

Hello CKPT,
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29677          YES          NO     2012/02/22 22:32
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29678 YES YES 2012/02/22 23:11
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