Brendan Gregg

MAY 8, 2021

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. Rotational disks have extra latency from head seeks for random I/O, and spin ups from the idle state. Hit Ctrl-C to end. Hit Ctrl-C to end. Tracing block device I/O.

Performance 133

Performance Latency Speed Systems 133

Brendan Gregg

MAY 8, 2021

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. Rotational disks have extra latency from head seeks for random I/O, and spin ups from the idle state. Hit Ctrl-C to end. Hit Ctrl-C to end. 10ms, 20ms, 30ms, 40ms, etc.)

Performance 40

Performance Latency Speed Systems 40

Brendan Gregg

MAY 8, 2021

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. Rotational disks have extra latency from head seeks for random I/O, and spin ups from the idle state. Hit Ctrl-C to end. Hit Ctrl-C to end. Tracing block device I/O.

Performance 40

Performance Latency Speed Systems 40