闈㈣瘯瀹橈細JDK8鍐呭瓨璋冧紭鎬庝箞鍋氾紵鐪嬬潃闈㈣瘯瀹樼湡璇氱殑鐪肩锛屾垜蹇冮噷鎯宠嚜宸辩湅鐫€骞寸邯涓嶅ぇ锛屽嵈闂嚭杩欎箞鐩村嚮蹇冪伒鐨勯棶棰樸€傛摝浜嗘摝棰濆ご涓婄殑姹楌煒擄紝绋嶅井璋冩暣浜嗕竴涓嬬揣寮犵殑蹇冩儏馃槬锛屽闈㈣瘯瀹樿锛氬唴瀛樿皟浼樹箣鍓嶏紝浣犻渶瑕佷簡瑙ｄ竴涓婮DK8鐨勫唴瀛樺尯鍩熸槸鎬庝箞鍒掑垎鐨勶細JDK8memorystructureJDK8鐨勫唴瀛樼粨鏋勪富瑕佸寘鎷琍rogramCounterRegister銆丣avaVirtualMachineStacks銆丯ativeMethodStacks銆丣avaHeap銆丮etaspace銆俬eap鍒嗕负OldGeneration鍜孻oungGeneration锛孻oungGeneration鍒嗕负涓€涓狤den鍖哄拰涓や釜Survivor鍖恒€傝竟璇磋竟鎻愮瑪鍦ㄧ焊涓婄敾锛氱敾瀹屼箣鍚庤锛欽DK8鐨勫唴瀛樿皟浼樹富瑕侀拡瀵瑰爢鍜屽厓绌洪棿銆傚唴瀛樿皟浼樺父鐢ㄧ殑JVM鍙傛暟鏈夛細-serverJVM鏈嶅姟鍣ㄦā寮忥紝鍦ㄥCPU鏈嶅姟鍣ㄤ腑鍙互鏇村ソ鐨勫彂鎸ユ€ц兘銆?4浣嶇増鏈殑JDK浠呮敮鎸佹湇鍔″櫒妯″紡锛屽洜姝ゅ湪杩欑鎯呭喌涓嬭閫夐」鏄殣寮忕殑銆?Xmx鎸囧畾鍫嗗垎閰嶅唴瀛樼殑鏈€澶у€硷紝鐩稿綋浜?XX:MaxHeapSize銆備笉甯﹀瓧姣嶆椂锛屽崟浣嶄负瀛楄妭锛屽繀椤绘槸1024鐨勫€嶆暟涓斿ぇ浜?MB锛涘甫瀛楁瘝k鎴朘鏃讹紝鍗曚綅涓篕B锛涘甫瀛楁瘝m鎴朚鏃讹紝鍗曚綅涓篗B锛涘綋闄勫姞瀛楁瘝g鎴朑鏃讹紝鍗曚綅涓篏銆備笅渚嬩娇鐢ㄤ笉鍚岀殑鍗曚綅璁剧疆鍫嗗垎閰嶅唴瀛樼殑鏈€澶у€间负1GB锛?Xmx1G-Xmx1024M-Xmx1048576K-Xmx1073741824-Xms鎸囧畾鍫嗙殑鍒濆鍊煎爢鍒嗛厤鐨勫唴瀛樸€備笉鍔犲瓧姣嶆椂锛屽崟浣嶄负瀛楄妭锛屽繀椤讳负1024鐨勫€嶆暟锛屼笖澶т簬1MB锛涘姞瀛楁瘝k鎴朘鏃讹紝鍗曚綅涓篕B锛涘姞瀛楁瘝m鎴朚鏃讹紝鍗曚綅涓篗B锛涘綋鍔犱笂瀛楁瘝g鎴朑鏃讹紝鍗曚綅鏄疓銆傚鏋滀笉璁剧疆杩欎釜鍒濆鍊硷紝閭ｄ箞鍒濆鍊煎皢琚缃负鑰佸勾浠ｅ拰鏂扮敓浠ｅ垎閰嶇殑鍐呭瓨澶у皬涔嬪拰銆備互涓嬬ず渚嬩娇鐢ㄤ笉鍚岀殑鍗曚綅灏嗗垵濮嬪爢鍒嗛厤璁剧疆涓?GB锛?Xms4G-Xms4096M-Xms4194304K-Xms4294967296瀵逛簬鐢熶骇閮ㄧ讲锛?Xms鍜?Xmx閫氬父璁剧疆涓虹浉鍚岀殑鍊笺€?Xmn鎸囧畾鍫嗙殑骞磋交浠ｅ垎閰嶇殑鍐呭瓨鐨勫垵濮嬪€煎拰鏈€澶у€笺€備笉甯﹀瓧姣嶆椂锛屽崟浣嶄负瀛楄妭锛涘甫瀛楁瘝k鎴朘鏃讹紝鍗曚綅涓篕B锛涘甫瀛楁瘝m鎴朚鏃讹紝鍗曚綅涓篗B锛涘綋浣跨敤瀛楁瘝g鎴朑鏃讹紝鍗曚綅涓篏銆傚爢鐨勬柊鐢熶唬鍖哄煙鐢ㄤ簬瀛樻斁鏂扮殑瀵硅薄銆傚瀮鍦炬敹闆嗗湪璇ュ湴鍖烘瘮鍦ㄥ叾浠栧湴鍖烘墽琛屽緱鏇撮绻併€傚鏋滄柊鐢熶唬澶皬锛屽氨浼氳繘琛屽娆″瀮鍦惧洖鏀躲€傚鏋滄柊鐢熶唬鐨勫唴瀛樺お澶э紝鎵ц涓€娆″畬鏁寸殑鍨冨溇鍥炴敹鍙兘闇€瑕佸緢闀挎椂闂存墠鑳藉畬鎴愩€備竴鑸缓璁皢鏂扮敓浠ｇ殑澶у皬淇濇寔鍦ㄦ暣涓爢澶у皬鐨?/2鍒?/4涔嬮棿銆備笅闈㈢殑渚嬪瓙璁剧疆骞磋交浠ｅ垎閰嶅唴瀛樼殑鍒濆鍊煎拰鏈€澶у€间负2GB锛屼娇鐢ㄤ笉鍚岀殑鍗曚綅锛氬勾杞讳唬锛屼篃鍙互浣跨敤-XX:NewSize璁剧疆骞磋交浠ｇ殑鍒濆鍊硷紝浣跨敤-XX:MaxNewSize璁剧疆骞磋交浠ｇ殑鏈€澶у€笺€?XX:NewRatio鎸囧畾鑰佸勾浠ｅぇ灏忎笌鏂扮敓浠ｅぇ灏忕殑姣旂巼銆傞粯璁や负2锛屽嵆鑰佸勾浠ｄ笌鏂扮敓浠ｇ┖闂寸殑姣斾緥涓?:1锛屾柊鐢熶唬鍗犳嵁鏁翠釜鍫嗗唴瀛樼┖闂寸殑1/3銆備笅闈㈢殑渚嬪瓙灏嗚€佸勾浠ｄ笌鏂扮敓浠ｇ殑绌洪棿澶у皬姣斾緥璁剧疆涓?锛?XX:NewRatio=1鍙﹀鏂扮敓浠ｅ垎閰嶅唴瀛樿缃殑浼樺厛绾у涓嬶細楂樹紭鍏堢骇锛?XX:NewSize/-XX:MaxNewSizePriority:-XmnLowpriority:-XX:NewRatio-XX:SurvivorRatio鎸囧畾Eden鍖轰笌Survivor鍖虹殑绌洪棿澶у皬姣斾緥銆傞粯璁や负8锛屽嵆Eden鍖哄拰Survivor鍖虹殑绌洪棿澶у皬涓?:1銆傚洜涓烘湁涓や釜Survivor鍖猴紝Eden鍖哄崰浜嗘柊鐢熶唬鍐呭瓨澶у皬鐨?0%銆備笅闈㈢殑渚嬪瓙鏄缃瓻den鍖哄拰Survivor鍖虹殑绌洪棿澶у皬姣斾緥涓?锛?XX:SurvivorRatio=4-XX:MetaspaceSize鎸囧畾metaspace绗竴娆¤Е鍙戝瀮鍦惧洖鏀剁殑鍐呭瓨澶у皬闃堝€兼椂闂淬€傚綋鍏冪┖闂村唴瀛樹娇鐢ㄩ噺鎸佺画澧炲姞鐩村埌杈惧埌杩欎釜闃堝€兼椂锛屽氨浼氳Е鍙戝瀮鍦惧洖鏀躲€傚洜姝わ紝閫傚綋鎻愰珮杩欎釜闃堝€间細鍑忓皯鍨冨溇鍥炴敹鐨勬鏁般€傞粯璁ゅ€煎彇鍐充簬骞冲彴锛屼竴鑸湪20.8MB宸﹀彸銆備笅闈㈢殑渚嬪瓙鏄缃涓€娆¤Е鍙戝瀮鍦惧洖鏀剁殑metaspace鐨勫唴瀛樺ぇ灏忎负256MB锛?XX:MetaspaceSize=256M鏈変簺鏈嬪弸璇В浜嗚繖涓弬鏁帮紝閫犳垚浜嗕笉蹇呰鐨勯夯鐑︺€傞噸鐢充竴涓嬶細-XX:MetaspaceSize涓嶆槸鍏冪┖闂村唴瀛樺ぇ灏忕殑鍒濆鍊硷紝涓嶆槸鍏冪┖闂村唴瀛樺ぇ灏忕殑鍒濆鍊硷紝涓嶆槸鍏冪┖闂村唴瀛樺ぇ灏忕殑鍒濆鍊硷紝閲嶈鐨勮涓夋銆?XX:MaxMetaspaceSize鎸囧畾鍏冪┖闂村垎閰嶇殑鍐呭瓨鐨勬渶澶у€笺€傞粯璁や负鏃犻檺鍒讹紝鍏蜂綋鍙栧喅浜庣郴缁熶腑鐨勫彲鐢ㄥ唴瀛橀噺銆傜悊璁轰笂鍙互鍗犵敤鏁翠釜绯荤粺鐨勫唴瀛樸€備负浜嗛伩鍏嶈繖绉嶆偛鍓э紝褰卞搷绯荤粺涓婄殑鍏朵粬搴旂敤绋嬪簭锛岄渶瑕侀€傚綋鍦拌皟鏁村畠鐨勫ぇ灏忋€備笅闈㈢殑渚嬪瓙璁剧疆鍏冪┖闂村垎閰嶇殑鍐呭瓨鏈€澶у€间负512MB锛?XX:MaxMetaspaceSize=512M闈㈣瘯瀹樼瑧鐫€璇达細杩欎簺甯哥敤鐨勫唴瀛樿皟浼樺弬鏁版€荤粨鐨勫緢濂斤紝缁撳悎杩欎簺鍙傛暟鍙互鍐欎竴涓唴瀛樿皟浼樼殑渚嬪瓙鍚楋紵琚潰璇曞畼琛ㄦ壃鍚庯紝鎴戝帇涓嬪績涓殑鍠滄偊璇达細褰撶劧鍙互銆傚湪鍐呭瓨璋冧紭瀹炰緥涓紝灏嗗爢鍐呭瓨绌洪棿璁剧疆鐨勫敖鍙兘鐨勫ぇ锛屼互鍑忓皯鍨冨溇鍥炴敹鐨勬鏁般€傚亣璁炬湇鍔″櫒涓婅繕鏈?2GB鍙敤鍐呭瓨锛岄鍏堟寚瀹氬爢鍒嗛厤鍐呭瓨鐨勬渶澶у€煎拰鍒濆鍊间负8GB銆備竴鑸潵璇达紝鏂扮敓浠ｇ殑鍐呭瓨澶у皬闇€瑕佸湪鏁翠釜鍫嗗ぇ灏忕殑1/2鍒?/4涔嬮棿锛屾墍浠ユ寚瀹氭柊鐢熶唬鐨勫唴瀛樺ぇ灏忎负3GB銆傜劧鍚庡皢Eden鍖轰笌Survivor鍖虹殑绌洪棿澶у皬姣斾緥璁剧疆涓?銆侻etaspace涓涓€娆¤Е鍙戝瀮鍦惧洖鏀剁殑鍐呭瓨澶у皬闃堝€艰缃负256MB锛屼竴鑸潵璇磋冻澶熶簡銆傚厓绌洪棿鍒嗛厤鐨勫唴瀛樻渶澶ц缃负512MB锛屼互閬垮厤鍦ㄦ瀬绔儏鍐典笅鍗犵敤澶ч噺鍐呭瓨銆傛澶栵紝鎮ㄩ渶瑕佹槑纭寚瀹欽VM浠ユ湇鍔″櫒妯″紡鍚姩銆傚唴瀛樿皟浼樼殑鍙傛暟鍩烘湰瀹氫笅鏉ヤ簡锛岀敤瀹冩潵鍚姩涓€涓悕涓簅ne-more-study-0.0.1-SNAPSHOT.jar鐨刯ar鏂囦欢锛歫ava-server-Xmx8G-Xms8G-Xmn3G-XX:SurvivorRatio=4-XX:MetaspaceSize=256M-XX:MaxMetaspaceSize=512M-jarone-more-study-0.0.1-SNAPSHOT.jar濡傛灉鎵цjmap-heap鍛戒护鏌ョ湅瀵瑰簲Java杩涚▼鐨勫唴瀛橀厤缃拰浣跨敤鎯呭喌锛屽簲璇ユ槸杩欐牱鐨勶細闄勫姞鍒拌繘绋婭D31828锛岃绋嶅€?..璋冭瘯鍣ㄩ檮鍔犳垚鍔熴€傛娴嬪埌鏈嶅姟鍣ㄧ紪璇戝櫒銆侸VM鐗堟湰涓?5.251-b08浣跨敤绾跨▼鏈湴瀵硅薄鍒嗛厤銆傚叿鏈?涓嚎绋嬬殑骞惰GC鍫嗛厤缃細#Heap鍐呭瓨閰嶇疆MinHeapFreeRatio=0MaxHeapFreeRatio=100#鍫嗗唴瀛樻渶澶у€糓axHeapSize=8589934592(8192.0MB)#鏂扮敓浠ｅ唴瀛樺ぇ灏廚ewSize=3221225472(3072.0MB)#鏂扮敓浠ｅ唴瀛樻渶澶у€糓axNewSize=3221225472(3072.0MB)#澶у皬oftheoldgenerationmemoryOldSize=5368709120(5120.0MB)#鑰佸勾浠ｄ笌骞磋交浠ｇ殑绌洪棿澶у皬姣斾緥#鍥犱负璁剧疆浜哫mn鍙傛暟锛屾墍浠ヨ繖涓缃笉鐢熸晥NewRatio=2#绌洪棿鐨勬瘮渚婨denareatoaSurvivorareaSurvivorRatio=4#鍏冪┖闂翠腑绗竴娆¤Е鍙戝瀮鍦惧洖鏀剁殑鍐呭瓨SizeMetaspaceSize=268435456(256.0Mb)#鍏冪┖闂村唴瀛樻渶澶у€糓axMetaspaceSize=536870912(512.0MB)G1HeapRegionSize=0(0.0MB)HeapUsage:#HeapusagePSYoungGenerationEdenSpace:#Edenareamemoryusagecapacity=2147483648(2048.0MB)used=901945720(860.16MB)free=1245537928(1187.83MB)42.000120505690575%usedFromSpace:#Survivor鐨凢rom鍖哄唴瀛樺偍鐨勪娇鐢ㄦ儏鍐礳apacity=536870912(512.0MB)used=0(0.0MB)free=%Space11.To)To(5)#Survivor'sToareacapacity=536870912(512.0MB)used=0(0.0MB)free=536870912(512.0MB)0.0%usedPSOldGeneration#鑰佸勾浠ｅ唴瀛樹娇鐢╟apacity=5368709120(5120.0MB)used=0(0.0MB)鍏嶈垂=5368709120(5120.0MB)0.0%used12047internedStrings鍗犵敤1045744瀛楄妭銆傚惉瀹屾垜鐨勫洖绛旓紝闈㈣瘯瀹樹細鎰忓湴鍐叉垜绗戜簡绗戯紝浠夸經鎴戣繕鍦ㄧ湅濂圭殑鐪奸噷锛岃鍒颁竴涓濋挦浣╋紝姝ｆ墍璋擄細涓囦袱榛勯噾鏄撳緱锛屽崈閲戦毦姹傘€傛壘鐭ュ繁銆傛兂鐭ラ亾鎺ヤ笅鏉ヤ細鍙戠敓浠€涔堬紝灏卞惉涓嬩竴绔犲惂銆?/p>
