銆岀25璁层€?璋堣皥 JVM 鍐呭瓨鍖哄煙鍒掑垎锛屽摢浜涘尯鍩熷彲鑳藉彂鐢?OutOfMemoryError?|瀛︿範绗旇

Posted 2021-04-17 ETLshow

鏂?| ETLshow 锛堣浆杞借娉ㄦ槑鍑哄锛?/strong>

淇℃伅鐖嗙偢锛屾垜浠潵绛?/span>

馃挜馃挜馃挜

褰撳墠娴忚鍣ㄤ笉鏀寔鎾斁闊充箰鎴栬闊筹紝璇峰湪寰俊鎴栧叾浠栨祻瑙堝櫒涓挱鏀?

杩欐槸鎴戝涔犳瀬瀹㈡椂闂?nbsp;app 涓€奐ava鏍稿績鎶€鏈?6璁层€嬭绋嬬殑绗?nbsp;25 绡囧涔犵瑪璁帮紝鍧氭寔鍐欏畬 36 璁插涔犵瑪璁般€?/p>

1. JVM 鍐呭瓨鍖哄煙鐨勫垝鍒?/span>

• Java 铏氭嫙鏈烘爤(Java Virtual Machine Stack)
  姣忎釜绾跨▼鍦ㄥ垱寤烘椂閮戒細鍒涘缓涓€涓櫄鎷熸満鏍堬紝鍏跺唴閮ㄤ繚瀛樹竴涓釜鐨勬爤甯э紙Stack Frame锛?瀵瑰簲鐫€涓€娆℃鐨?Java 鏂规硶璋冪敤銆?br class="mq-18">鍦ㄤ竴涓椂闂寸偣锛屽搴旂殑鍙細鏈変竴涓椿鍔ㄧ殑鏍堝抚锛岄€氬父鍙綔褰撳墠甯э紝鏂规硶鎵€鍦ㄧ殑绫诲彨浣滃綋鍓嶇被銆?/span>
  鏍堝抚涓瓨鍌ㄧ潃灞€閮ㄥ彉閲忚〃銆佹搷浣滄暟鏍堛€佸姩鎬侀摼鎺ャ€佹柟娉曟甯搁€€鍑烘垨鑰呭紓甯搁€€鍑虹殑瀹氫箟绛夈€?/span>

• 鏈湴鏂规硶鏍?/span>(Native Method Stack)
  涓?Java 铏氭嫙鏈烘爤绫讳技锛屾敮鎸佸鏈湴鏂规硶鐨勮皟鐢紝涔熸槸姣忎釜绾跨▼閮戒細鍒涘缓涓€涓€?/span>

• 鍫?/span>(Heap)
  瀹冩槸 JVM 鍐呭瓨绠＄悊鐨勬牳蹇冨尯鍩燂紝GC 鍫嗭紝鐢ㄦ潵鏀剧疆 Java 瀵硅薄瀹炰緥銆?br class="mq-30">鍫嗭紝琚墍鏈夌嚎绋嬪叡浜€?/span>

• 鏂规硶鍖?/span>(Method Area)
  鐢ㄤ簬瀛樺偍鎵€璋撶殑鍏冿紙Meta锛夋暟鎹紝渚嬪绫荤粨鏋勪俊鎭紝浠ュ強瀵瑰簲鐨勮繍琛屾椂甯搁噺姹犮€佸瓧娈点€佹柟娉曚唬鐮佺瓑銆?br class="mq-36">鏂规硶鍖猴紝琚墍鏈夌嚎绋嬪叡浜€?/span>

• 杩愯鏃跺父閲忔睜(Run-Time Constant Pool)
  鏄柟娉曞尯鐨勪竴閮ㄥ垎銆傚瓨鏀惧悇绉嶅父閲忎俊鎭紝涓嶇鏄紪璇戝櫒鐢熸垚鐨勫悇绉嶅瓧闈㈤噺锛岃繕鏄渶瑕佸湪杩愯鏃跺喅瀹氱殑绗﹀彿寮曠敤銆?/span>

2. Java 杩涚▼鍐呭瓨鍗犵敤

绗?nbsp;1 鐐癸紝鏄?nbsp;JVM 瑙勮寖涓畾涔夌殑 JVM 杩愯鏃跺唴瀛樺崰鐢紝瑙勮寖渚ч噸鐨勬槸閫氱敤鐨勩€佹棤宸埆鐨勯儴鍒嗭紝瀵逛簬搴旂敤寮€鍙戣€呮潵璇达紝鍙鏄?nbsp;JVM 杩涚▼鍦ㄨ繍琛屾椂浼氬崰鐢紝閮戒細褰卞搷鍒版垜浠殑宸ョ▼瀹炶返銆傚洜姝ら渶瑕佽ˉ鍏呬袱鐐癸細

• 鐩存帴鍐呭瓨(Direct Memory)
  Direct Buffer 鎵€鐩存帴鍒嗛厤鐨勫唴瀛樸€?/span>

• Code Cache
  JVM 鏈韩鏄釜鏈湴绋嬪簭锛岃繕闇€瑕佸叾浠栫殑鍐呭瓨鍘诲畬鎴愬悇绉嶅熀鏈换鍔★紝姣斿锛孞IT Compiler 鍦ㄨ繍琛屾椂瀵圭儹鐐规柟娉曡繘琛岀紪璇戯紝灏变細灏嗙紪璇戝悗鐨勬柟娉曞瓨鍌ㄥ湪 Code Cache 閲岄潰锛汫C 绛夊姛鑳介渶瑕佽繍琛屽湪鏈湴绾跨▼涔嬩腑锛岀被浼奸儴鍒嗛兘瑕佸崰鐢ㄥ唴瀛樼┖闂淬€?/span>

3. 鍝簺鍖哄煙鍙兘鍙戠敓 OOM

OOM 灏辨槸 JVM 鍐呭瓨涓嶅鐢ㄤ簡锛屽嵆娌℃湁绌洪棽鍐呭瓨锛屽苟涓斿瀮鍦炬敹闆嗗櫒涔熸棤娉曟彁渚涙洿澶氬唴瀛樸€?/span>

闄や簡绋嬪簭璁℃暟鍣紝鍏朵粬鍖哄煙閮藉彲鑳戒細鍥犱负鍙兘鐨勭┖闂翠笉瓒冲彂鐢?OOM 銆?/span>

• 鍫?/span>
  閿欒淇℃伅锛?java.lang.OutOfMemoryError:Java heap space"
  鍘熷洜锛氬彲鑳藉瓨鍦ㄥ唴瀛樻硠闇查棶棰樸€佸彲鑳藉爢鐨勫ぇ灏忎笉鍚堢悊

• Java 铏氭嫙鏈烘爤鍜屾湰鍦版柟娉曟爤
  閿欒淇℃伅锛?StackOverFlowError" "OutOfMemoryError"
  鍘熷洜锛氬彲鑳界敱浜庝笉鏂殑杩涜閫掑綊璋冪敤

4. 鎬荤粨

鐢讳釜鍥惧氨寰堢洿瑙備簡锛屻€奐ava 鏍稿績鎶€鏈?nbsp;36 璁层€嬬殑鍥剧湡鐨勪笉閿欍€?/span>

5. 鍙傝€冩枃妗?/span>

銆奐ava 鏍稿績鎶€鏈?nbsp;36 璁层€?/span>

闀挎寜浜岀淮鐮佸叧娉?ETLshow

淇℃伅鐖嗙偢锛屾垜浠潵绛?/span>

 鍠滄ETLshow

 鐐瑰湪鐪嬪摝鈻?/span>