: He reconfigured the predicate filtering. He wanted the storage cells to discard the junk before it ever hit the network.
He didn't start with the basics. He skipped straight to the chapters on and Storage Indexes . He realized he’d been treating the Exadata like a traditional SAN. He was moving too much data to the compute nodes when he should have been letting the storage cells do the heavy lifting. Expert Oracle Exadata, 2nd Edition
If you’re looking to master your own "monolith," I can help you dive deeper. : He reconfigured the predicate filtering