How to Stop and Start Cluster in Oracle Node by Node to Increase RAM in RAC

•  Its quite simple to bounce the cluster and instances in Oracle 11g RAC.

• We bounce the whole cluster to upgrade the RAM on the server from 64gb to 96 gb

• Upgradation done Node by Node like OS team first upgraded to node1 and then they upgraded to node2.

Environment :-

• Operating System    :   Windows 2008 R2 Server
• Database                 :   11.2.0.3 
• RAC                         :   2 Node Cluster

Steps Followed :-

• Announced Down Time.

• Shutdown the Application.

• Shutdown the Instances on Node1.

          ] srvctl stop instance -i otslive1 -d otslive

         ] srvctl stop instance -i keplive1 -d keplive

• Stop CRS services on Node1

         ] crsctl stop crs 

> When i stop  the CRS  we  informed OS Technical Team to update RAM on Node1 Server

    because when you stop the crs it disconnects the RDBMS & ASM instances including crs daemons, SCAN listeners etc....

• Now check the status of the Instances it will show NO instances are running on Node1

        ] srvctl status instance -i otslive1 -d otslive

       ] srvctl status instance -i keplive1 -d keplive

•  Now start CRS on Node1

• When you start CRS all the Instances and daemons of Node1 will start automatically

• Perform same steps for Node2.

• Stop instances of Node2 & Stop CRS services in Node2 and after Upgrading RAM on Node2 then start CRS of Node2...

• Now cross check all the CLUSTER services up and running or not...

     

Happy Learning....