تفريغات الذاكرة

في هذا الدرس

capture and analyze a heap dump for large retainers.

الموضوعات المخطط لها

• Capture: jcmd <pid> GC.heap_dump file.hprof; it pauses the app and creates a large file; handle carefully (may contain secrets).
• Open in Eclipse MAT or VisualVM.
• Shallow size is the object itself; retained size is what would be freed if it went away.
• Dominator tree lists biggest retainers; "path to GC roots" explains why it is live.
• Compare two dumps to find growth.