High Availability Architecture

Jun 18, 2021 · Databases

Polar Index: Removing the Global Index Latch to Accelerate InnoDB B‑Tree SMO Operations

The article explains how PolarDB's Polar Index redesigns InnoDB B‑Tree structural modification (SMO) by splitting the operation into two phases, eliminating the global index latch, reducing lock granularity, and achieving up to 11× performance gains in high‑concurrency workloads such as TPCC.