Day 3 — In-Memory Computing

What is In-Memory Computing? Why is it important in SAP HANA?

Traditional Databases Disk → CPU SAP HANA RAM → CPU Since RAM is much faster than disks, SAP HANA processes huge amounts of data almost instantly. Advantages ✔ Faster report execution ✔ Faster searching ✔ Faster calculations ✔ Reduced I/O operations ✔ Real-time analytics Traditional Database Reading 100 GB data from disk may take several minutes. SAP HANA The same 100 GB is already available in RAM. Execution happens in seconds.

Finance department generates Profit & Loss reports every morning. Old Database Time Taken = 40 minutes SAP HANA Time Taken = 8 seconds Business users can immediately review the financial status.

1. What is In-Memory Computing? 2. Why is RAM faster? 3. What are the advantages? 4. Why does SAP HANA use RAM? 5. What is disk I/O?