Hi, I am sorry if I missed out the reply to this or amy 'repeating' the question But can someone help me please? I am trying to find the 'exact' amount of memory consumed out of the RAM by each Oracle process. The Oracle manual says that , "NOT ALL of the memory displayed by ps command is due to PGA" some of it is Oracle code (is it Oracle executable?) Can someone please tell how to estimate the amount of memory required? ie how much PGA? how much Oracle code? how much overhead etc? Thanks a lot PS: Please note that the above exercise is not academic and is urgently required by me to order for RAM _____________________________________________________ Chat with your friends as soon as they come online. Get Rediff Bol at http://bol.rediff.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Cyril Thankappan INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).