chewiebug/GCViewer
GCViewer
GCViewer هو أداة لتصور جمع القمامة (garbage collection) في JVM وتحليل الذاكرة. يعمل كمحلل سجلات ومصدر للمقاييس يقوم بتحويل سجلات جمع القمامة المطولة في JVM إلى بيانات منظمة، ورسوم بيانية مرئية، وتقارير ملخصة.
يمكن المشروع من تصور حجم الكومة (heap)، واستخدام الأجيال، وتوقيت الجمع من خلال رسوم بيانية متعددة الخطوط. ويتتبع بشكل خاص فترات التوقف (stop-the-world)، ودورات الجمع المتزامنة، وبصمة الذاكرة للمساعدة في اكتشاف تسريبات الذاكرة وضبط أحجام الكومة.
تغطي الأداة قدرات معالجة السجلات مثل محاذاة الطوابع الزمنية ودمج ملفات السجلات المدورة. كما توفر وظيفة تصدير البيانات، مما يسمح بتسلسل السجلات المحللة إلى تنسيقات CSV أو نص عادي للتدقيق الخارجي.
Features
- JVM Memory Analysis - Analyzes JVM heap usage, generation sizes, and pause durations from garbage collection logs.
- Garbage Collection Monitors - Transforms JVM garbage collection log files into visual charts and summary reports for performance tuning.
- Multi-Chart Visualization Tools - Transforms processed memory and timing data into multi-line charts for comparative visual trend analysis.
- Java Garbage Collection Analysis - Analyzes Java GC logs to visualize memory management and identify causes of application latency.
- JVM Performance Tuning - Measures heap size and throughput from logs to optimize memory allocation and reduce pause times.
- Regex-Based Log Parsers - Extracts structured garbage collection events from raw text files using pattern matching and regular expression rules.
- GC Log Analyzers - Processes verbose garbage collection output and converts it into structured data for memory analysis.
- Memory Metric Plots - Plots heap size, generation usage, and collection timing over time using multi-line charts and event markers.
- Memory Leak Detection - Tracks heap usage and collection patterns over time to identify memory leaks in Java applications.
- GC - Creates text summaries and chart images from log files via a command-line interface for rapid performance audits.
- GC Pause Diagnosis Tools - Calculates stop-the-world pause durations and safepoint overhead to pinpoint causes of application latency.
- Concurrent Collection Tracking - Monitors the start, end, and total duration of collection cycles that occur while application threads are running.
- Stop-The-World Pauses - Calculates the frequency and duration of stop-the-world pause events to improve application responsiveness.
- Duration & Throughput Statistics - Computes stop-the-world pause durations and throughput statistics by summing individual event intervals from log streams.
- Rotated Log Sequence Handling - Reads multiple rotated log files as a single continuous sequence to maintain timeline continuity across file boundaries.
- Log Timestamp Normalization - Calculates event durations and absolute times by anchoring relative log timestamps to a user-defined start time.
- Rotated Log Parsers - Reads multiple sequential log files as a single continuous stream to maintain analysis across rotated log sets.
- JVM Profiling Tools - Visualizes verbose garbage collection output.
