How to change the SGA

Hello
I use 11.2.0.3 DB RAC ASM. Right now my DB is up and Spfile spfile on asm. I want to increase SGA from 2 GB to 8 GB. Kindly advice me the steps how do I do this.


SQL > show parameter spfile;

VALUE OF TYPE NAME
------------------------------------ ----------- ------------------------------
+DATA_DISK/dev/spfiledev.ora string SPFile


SQL > show parameter sga;

VALUE OF TYPE NAME
------------------------------------ ----------- ------------------------------
lock_sga boolean FALSE
PRE_PAGE_SGA boolean FALSE
very large integer SGA_MAX_SIZE 2112 M
Whole large SGA_TARGET 2112M
SQL >


Thank you
Krishna

First check the memory on each node, if you have enough memory then (assuming spfile shared for all nodes)

create a pfile='/tmp/initbackup.ora' of spfile; ---> To save.

alter system set = 8 g sga_max_size brought spfile sid ='* ';
ALTER system set sga_target = 8g brought spfile sid ='* ';

on node 1:
srvctl stop instance d -i
srvctl start instance d -i

Then check the sga

Repeat the same steps for different nodes

Tags: Database

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