Oracle Fusion Middleware 12c: Oracle Service Bus Essentials — Question 14

Which statement is TRUE about the Persistent Memory Commit Accelerator?

Answer options

• A. Persistent Memory Commit Accelerator contains logging information from all tiers of the software stack for rapid triage and diagnostics.
• B. Persistent Memory Commit Accelerator reduces redo log write latency by using Persistent Memory and RDMA before flushing to Flash then disk.
• C. Persistent Memory Commit Accelerator tracks changes to Persistent Memory Data Accelerator to ensure duplicate blocks are not written to Flash.
• D. Persistent Memory Commit Accelerator copies redo log data from disk for faster redo apply on Data Guard Standby Databases.
• E. Persistent Memory Commit Accelerator allows the database to issue one-way RDMA writes to PMEM, FLASH, and Disks concurrently, thereby reducing redo fog write latency.

Correct answer: B

Explanation

Option B is correct because the Persistent Memory Commit Accelerator indeed decreases redo log write latency by utilizing Persistent Memory and RDMA before writing to Flash and disk. The other options describe functionalities that are not accurate representations of the Persistent Memory Commit Accelerator's capabilities.