G1GC Pause Time Analyzer & Advisor

A rule-based analyzer that parses G1GC logs and:

• Detects Stop-The-World (STW) pauses exceeding a target (MaxGCPauseMillis)
• Flags common performance-degrading patterns (e.g., to-space exhausted, humongous allocations, concurrent mode failure, long remark)
• Produces actionable tuning suggestions with evidence lines

Docs (KR / EN)

• Korean: docs/README.ko.md
• English: docs/README.en.md

See also:

• Rule trigger conditions: docs/README.en.md#rule-trigger-conditions / docs/README.ko.md#진단이-뜨는-조건rule-trigger-conditions

Quickstart

Install (editable):

py -m pip install -e .

Run:

g1gc-advisor --log path\to\gc.log --max-pause-ms 200

Without installing (module execution):

py -m gccapture.cli --log path\to\gc.log --max-pause-ms 200

Write JSON report:

g1gc-advisor --log gc.log --max-pause-ms 200 --json-out report.json