dbaplus Community

Mar 14, 2016 · Operations

Why iostat’s %util and svctm Mislead on SSDs and How to Read Them Correctly

The article explains why iostat’s %util and svctm values, reliable for traditional disks, become misleading on modern SSDs and RAID arrays, and provides step‑by‑step methods, formulas, and practical benchmarks to reinterpret these metrics for accurate storage performance analysis.