2.1.14.10 Pipelined Log Writes

Redo log latency has always been critical for On-Line Transaction Processing (OLTP) performance. Previously, to streamline processing and avoid potential interruptions associated with process coordination, each log write was treated as a serial atomic operation.

Starting with Exadata X10M, the Oracle Database log writer can use the high-performance Exadata RoCE Network Fabric and Exadata Smart Flash Log to facilitate pipelined log writes. This capability leverages advancements in modern system hardware to run multiple concurrent log writes in parallel without impacting the latency of each redo log write. The result is a considerable overall improvement in OLTP performance by minimizing the need to queue log writes.

In conjunction with Oracle Exadata System Software release 24.1.0, this feature is available in Oracle Database 23ai and is also incorporated in the January 2024 release update for Oracle Database 19c.