Brendan Gregg

MAY 8, 2021

An average of 434 ms is awful, and a small queue size (aqu-sz) indicates it's a problem with the disk and not the workload applied. From these outputs I try to determine if the problem is: - **The workload**: High-latency disk I/O is commonly caused by the workload applied. avg-cpu: %user %nice %system %iowait %steal %idle 7.90

Performance 142

Performance Latency Speed Systems 142

Brendan Gregg

MAY 8, 2021

An average of 434 ms is awful, and a small queue size (aqu-sz) indicates it's a problem with the disk and not the workload applied. From these outputs I try to determine if the problem is: - **The workload**: High-latency disk I/O is commonly caused by the workload applied. avg-cpu: %user %nice %system %iowait %steal %idle 7.90

Performance 40

Performance Latency Speed Systems 40

Brendan Gregg

MAY 8, 2021

An average of 434 ms is awful, and a small queue size (aqu-sz) indicates it's a problem with the disk and not the workload applied. From these outputs I try to determine if the problem is: - **The workload**: High-latency disk I/O is commonly caused by the workload applied. avg-cpu: %user %nice %system %iowait %steal %idle 7.90

Performance 40

Performance Latency Speed Systems 40