Annath, If you have to decide and had the oportunity then I will say start with 4 GIGA and dual processor. Reset depend on how many users you have , what type of processors or Machine you have and the Appliction Plus amount of data. In Short, Play safe 3 production databases start with 4 GB memory and 2 Processors. Good Luck. Ananth Antony <ananth_a_75@xxxxxxxxx> wrote: Hi Friends..Happy new year to all.... am having 3 databases (production) in my machine...which will contribute 500MB + 500MB + 300 MB of SGA. so the total SGA size for all the 3 databases will be 1.3GB. NOW tell me what size of RAM you recommend from me to run all these databases without any performance degradation. Thanks Ananth --------------------------------- Do you Yahoo!? Yahoo! Mail - now with 250MB free storage. Learn more. [Non-text portions of this message have been removed] --------------------------------- Yahoo! Groups Links To visit your group on the web, go to: http://groups.yahoo.com/group/dba_gurus/ To unsubscribe from this group, send an email to: dba_gurus-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. --------------------------------- Do you Yahoo!? Dress up your holiday email, Hollywood style. Learn more.