by Heinrich Hartmann | August 21st, 2017 The USE method was developed by Brendan Gregg to study performance problems in a systematic way.1 It provides a simple, top-down approach to identify bottlenecks quickly and reliably. The gathering of performance metrics is usually done using a myriad of different system tools (sar, iostat, vmstat) and tracers (dtrace, perf, ebpf). Circonus has now added the most relevant USE metrics to its monitoring agent, and conveniently presents them in the form o...