Database Tuning (MOSC)

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Advice on SGA_MAX_SIZE

edited Jul 30, 2013 8:08PM in Database Tuning (MOSC) 5 commentsAnswered ✓
Hi,

I have a server with 16 Gb RAM - so

Q1. If only running one 11g instance on this server, what size should I set my SGA_TARGET and SGA_MAX_SIZE ? I am presuming SGA_MAX_SIZE can be up to the amount of Free Ram on the server ?

Q2. If I decide to run three 11g Instances on this server, what should I set the SGA_TARGET and SGA_MAX_SIZE for each instance ? Does their totals have to add up to the free RAM on the server ? If I go beyond say a simple split of 5G each and say have SGA_MAX_SIZE for each of 7Gb, could I be risking OS swapping / paging ?

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