Alibaba Cloud Developer

Nov 5, 2021 · Databases

How PolarDB MySQL’s In‑Memory Column Index Supercharges HTAP Performance

This article explains how PolarDB MySQL introduces an In‑Memory Column Index (IMCI) to combine row‑store OLTP strength with column‑store analytical speed, detailing the architectural innovations, optimizer decisions, data organization, resource isolation strategies, and benchmark results that show IMCI achieving tens to hundreds of times faster query execution than native MySQL and matching ClickHouse performance.