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鍒嗕韩鍒帮細
鏃堕棿:2020-05-12 21:16鏉ユ簮:http://vitrailad.com 浣滆€?灏忛攱  渚垫潈涓炬姤
java鏍稿績闈㈣瘯鐭ヨ瘑鏁寸悊(鏋舵瀯甯? PDF 涓嬭浇
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2.2.1. 绋嬪簭璁℃暟鍣?绾跨▼绉佹湁)
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2.2.2. 铏氭嫙鏈烘爤(绾跨▼绉佹湁)
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鏍堝抚锛?Frame锛夋槸鐢ㄦ潵瀛樺偍鏁版嵁鍜岄儴鍒嗚繃绋嬬粨鏋滅殑鏁版嵁缁撴瀯锛屽悓鏃朵篃琚敤鏉ュ鐞嗗姩鎬侀摼鎺?/div>
(Dynamic Linking)銆?鏂规硶杩斿洖鍊煎拰寮傚父鍒嗘淳锛?Dispatch Exception锛夈€傛爤甯ч殢鐫€鏂规硶璋冪敤鑰屽垱
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寤猴紝闅忕潃鏂规硶缁撴潫鑰岄攢姣?mdash;—鏃犺鏂规硶鏄甯稿畬鎴愯繕鏄紓甯稿畬鎴愶紙鎶涘嚭浜嗗湪鏂规硶鍐呮湭琚崟鑾风殑寮?/div>
甯革級閮界畻浣滄柟娉曠粨鏉熴€?/div>
2.2.3. 鏈湴鏂规硶鍖?绾跨▼绉佹湁)
鏈湴鏂规硶鍖哄拰 Java Stack 浣滅敤绫讳技, 鍖哄埆鏄櫄鎷熸満鏍堜负鎵ц Java 鏂规硶鏈嶅姟, 鑰屾湰鍦版柟娉曟爤鍒欎负
Native 鏂规硶鏈嶅姟, 濡傛灉涓€涓?VM 瀹炵幇浣跨敤 C-linkage 妯″瀷鏉ユ敮鎸?Native 璋冪敤, 閭d箞璇ユ爤灏嗕細鏄竴涓?/div>
C 鏍堬紝浣?HotSpot VM 鐩存帴灏辨妸鏈湴鏂规硶鏍堝拰铏氭嫙鏈烘爤鍚堜簩涓轰竴銆?/div>
2.2.4. 鍫嗭紙Heap-绾跨▼鍏变韩锛?杩愯鏃舵暟鎹尯
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鍨冨溇鏀堕泦鐨勬渶閲嶈鐨勫唴瀛樺尯鍩熴€傜敱浜庣幇浠?VM 閲囩敤鍒嗕唬鏀堕泦绠楁硶, 鍥犳 Java 鍫嗕粠 GC 鐨勮搴﹁繕鍙互
缁嗗垎涓? 鏂扮敓浠?Eden 鍖恒€丗rom Survivor 鍖哄拰 To Survivor 鍖?鍜岃€佸勾浠c€?/div>
2.2.5. 鏂规硶鍖?姘镐箙浠o紙绾跨▼鍏变韩锛?/div>
鍗虫垜浠父璇寸殑姘镐箙浠?Permanent Generation), 鐢ㄤ簬瀛樺偍琚?JVM 鍔犺浇鐨勭被淇℃伅銆佸父閲忋€侀潤
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鐨勫嵏杞? 鍥犳鏀剁泭涓€鑸緢灏?銆?/div>
杩愯鏃跺父閲忔睜锛圧untime Constant Pool锛夋槸鏂规硶鍖虹殑涓€閮ㄥ垎銆侰lass 鏂囦欢涓櫎浜嗘湁绫荤殑鐗?/div>
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锛圕onstant Pool Table锛夛紝鐢ㄤ簬瀛樻斁缂栬瘧鏈熺敓鎴愮殑鍚勭瀛楅潰閲忓拰绗﹀彿寮曠敤锛岃繖閮ㄥ垎鍐呭灏嗗湪绫诲姞
杞藉悗瀛樻斁鍒版柟娉曞尯鐨勮繍琛屾椂甯搁噺姹犱腑銆?Java 铏氭嫙鏈哄 Class 鏂囦欢鐨勬瘡涓€閮ㄥ垎锛堣嚜鐒朵篃鍖呮嫭甯搁噺
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琚櫄鎷熸満璁ゅ彲銆佽杞藉拰鎵ц銆?/div>
2.3.JVM 杩愯鏃跺唴瀛?/div>
Java 鍫嗕粠 GC 鐨勮搴﹁繕鍙互缁嗗垎涓? 鏂扮敓浠?Eden 鍖恒€丗rom Survivor 鍖哄拰 To Survivor 鍖?鍜岃€佸勾
浠c€?/div>
2.3.1. 鏂扮敓浠?/div>
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2.3.1.1. Eden 鍖?/div>
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MinorGC 閲囩敤澶嶅埗绠楁硶銆?/div>
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澶熶綅缃簡灏辨斁鍒拌€佸勾鍖猴級锛?/div>
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鏈€鍚庯紝ServicorTo 鍜?ServicorFrom 浜掓崲锛屽師 ServicorTo 鎴愪负涓嬩竴娆?GC 鏃剁殑 ServicorFrom
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澶熷ぇ鐨勮繛缁┖闂村垎閰嶇粰鏂板垱寤虹殑杈冨ぇ瀵硅薄鏃朵篃浼氭彁鍓嶈Е鍙戜竴娆?MajorGC 杩涜鍨冨溇鍥炴敹鑵惧嚭绌洪棿銆?/div>
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