Check IO Bottlenecks in 45 Seconds. The "45 Seconds DBA Series" – What Real DBAs Check First | Part 5
Before we dive into today's topic, if you missed my previous post you can take a look at Check Memory Pressure in 45 Seconds . Check IO Bottlenecks in 45 Seconds. The "45 Seconds DBA Series" – What Real DBAs Check First | Part 5 🥇 In this post, I’ll show you how to definitively identify SQL Server I/O bottlenecks in under 45 seconds using targeted DMVs. Stop guessing between latency and throughput, and start fixing the real storage queues! TL;DR ✔️ Latency vs Throughput: Latency is speed (ms), Throughput is volume (MB/s). Know the difference! 🧠 ✔️ sys.dm_io_virtual_file_stats: The ultimate DMV to check database file read/write latency 🛠️ ✔️ sys.dm_os_wait_stats: Exposes global IO waits like PAGEIOLATCH_SH and WRITELOG 💣 ✔️ The 20ms Rule: Consistently > 20ms latency on data files means you have a serious storage bottleneck 🚨 Hi SQL SERVER Guys, We all know how important i...
