Re: [問題] 想知道java heap預設大小

看板java作者qrtt1 (lonely)時間14年前 (2012/02/06 11:42)推噓3(3推 0噓 2→)

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※ 引述《kuro44776 (羽嵐)》之銘言： : 如題 : 最近在跑一個大型的程式 : 但是經常跑到一半就出現 outofmemoryerror : java heap space : 經過爬文原因似乎是因為jvm的記憶體用盡 : 所以我一口氣把他加到10G : 目前程式還在執行中(希望別再出狀況的) : 但是這一點也因此讓我很好奇 : 他預設的SIZE到底是多大啊??? : 他是會自行決定還是有一個預設值在? : 因為找不到相關的資訊所以才來發問 : 希望可以從這邊知道答案謝謝 qty:lab qrtt1$ jps 10499 JConsole 10502 Jps qty:lab qrtt1$ jmap -heap 10499 Attaching to process ID 10499, please wait... Debugger attached successfully. Server compiler detected. JVM version is 20.4-b02-402 using parallel threads in the new generation. using thread-local object allocation. Concurrent Mark-Sweep GC Heap Configuration: MinHeapFreeRatio = 40 MaxHeapFreeRatio = 70 MaxHeapSize = 132120576 (126.0MB) NewSize = 21757952 (20.75MB) MaxNewSize = 87228416 (83.1875MB) OldSize = 65404928 (62.375MB) NewRatio = 7 SurvivorRatio = 8 PermSize = 21757952 (20.75MB) MaxPermSize = 85983232 (82.0MB) Heap Usage: New Generation (Eden + 1 Survivor Space): capacity = 19595264 (18.6875MB) used = 3182272 (3.03485107421875MB) free = 16412992 (15.65264892578125MB) 16.24000574832776% used Eden Space: capacity = 17432576 (16.625MB) used = 1019584 (0.97235107421875MB) free = 16412992 (15.65264892578125MB) 5.848728265977444% used From Space: capacity = 2162688 (2.0625MB) used = 2162688 (2.0625MB) free = 0 (0.0MB) 100.0% used To Space: capacity = 2162688 (2.0625MB) used = 0 (0.0MB) free = 2162688 (2.0625MB) 0.0% used concurrent mark-sweep generation: capacity = 65404928 (62.375MB) used = 119080 (0.11356353759765625MB) free = 65285848 (62.261436462402344MB) 0.18206579173972945% used Perm Generation: capacity = 21757952 (20.75MB) used = 17986584 (17.153343200683594MB) free = 3771368 (3.5966567993164062MB) 82.6667142201619% used qty:lab qrtt1$ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 220.130.128.164

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kuro44776

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