증상별 첫 diagnostic evidence

문제 종류에 맞는 도구를 선택해 data noise를 줄인다.

Incident symptom

Wrong state

debugger·cause chain

single run

Lock

thread dump·monitor event

wait graph

CPU

JFR·flame graph

samples

Memory·I/O

GC·allocation·socket event

timeline

핵심: PID·deploy version·timezone·수집 command를 evidence에 남긴다.