قراءة سجلات GC

في هذا الدرس

enable unified GC logging and read its key fields.

الموضوعات المخطط لها

• Enable: -Xlog:gc*:file=gc.log:time,uptime (verify flags for your JDK).
• Each line shows the collection type, heap before -> after (total), and pause duration.
• Healthy: frequent short young pauses; heap after full/mixed collections returns to a stable floor.
• Warning signs: floor rising over time (leak), full GCs, pauses over the goal, back-to-back collections (allocation pressure).
• Tools such as GCViewer or GCeasy help; learn to read the raw lines first.