Database - RAC/Scalability (MOSC)

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RAC Shared memory area between instances.

edited Sep 10, 2020 8:59AM in Database - RAC/Scalability (MOSC) 5 commentsAnswered ✓

Dear All,

We are planning to upgrade our database from 12c to 19c and along with that planning to change Oracle Grid infrastructure from RAC One to RAC.

So there will be two instances with shared storage. Known that RAC will help us to increase the load, I have a basic question.

For an example, I have 2 instances (Node A & Node with 300 Gb memory each. Now I am making connection to the database and landing into Node A with Load balancers help and running a resource intensive query which requires more memory (>300 Gb) than  Node A intance memory, will Oracle GI RAC infrastructure help me to get some part of memory from Node B to finish my query? To be simple, will the memory (SGA,PGA) be shared between RAC instances for a single user session?

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