{"id":1230,"date":"2019-06-24T19:16:12","date_gmt":"2019-06-24T11:16:12","guid":{"rendered":"https:\/\/blog.jsjs.org\/?p=1230"},"modified":"2019-06-24T19:16:12","modified_gmt":"2019-06-24T11:16:12","slug":"%e9%85%8d%e7%bd%aetomcat%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%86%85%e5%ad%98%e5%a4%a7%e5%b0%8f%e4%b8%ad%e7%9a%84xms%e3%80%81xmx%e3%80%81permsize%e3%80%81maxpermsize-%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=1230","title":{"rendered":"\u914d\u7f6etomcat\u670d\u52a1\u5668\u5185\u5b58\u5927\u5c0f\u4e2d\u7684Xms\u3001Xmx\u3001PermSize\u3001MaxPermSize \u8be6\u89e3"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

JVM\u6309\u7167\u5176\u5b58\u50a8\u6570\u636e\u7684\u5185\u5bb9\u5c06\u6240\u9700\u5185\u5b58\u5206\u914d\u4e3a\u5806\u533a\u4e0e\u975e\u5806\u533a\u4e24\u4e2a\u90e8\u5206\uff1a<\/p>\n\n\n\n

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\u975e\u5806\u533a\u5373\u4e3a\u4ee3\u7801\u3001\u5e38\u91cf\u3001\u5916\u90e8\u8bbf\u95ee\uff08\u5982\u6587\u4ef6\u8bbf\u95ee\u6d41\u6240\u5360\u8d44\u6e90\uff09\u7b49\u3002<\/p>\n\n\n\n

\u914d\u7f6e\u5806\u533a\u7684\uff08-Xms \u3001-Xmx\u3001-XX:newSize\u3001-XX:MaxnewSize\u3001-Xmn\uff09<\/p>\n\n\n\n

\u914d\u7f6e\u975e\u5806\u533a\uff08-XX:PermSize\u3001-XX:MaxPermSize\uff09<\/p>\n\n\n\n

\u4e00. \u5806\u533a\u914d\u7f6e\u53c2\u6570:<\/p>\n\n\n\n

\u00a0\u00a0\u00a0 1\u3001-Xms \uff1a\u8868\u793ajava\u865a\u62df\u673a\u5806\u533a\u5185\u5b58\u521d\u59cb\u5185\u5b58\u5206\u914d\u7684\u5927\u5c0f\uff0c\u865a\u62df\u673a\u5728\u542f\u52a8\u65f6\u5411\u7cfb\u7edf\u7533\u8bf7\u7684\u5185\u5b58\u7684\u5927\u5c0f<\/p>\n\n\n\n

\u3000 2\u3001-Xmx\uff1a \u8868\u793ajava\u865a\u62df\u673a\u5806\u533a\u5185\u5b58\u53ef\u88ab\u5206\u914d\u7684\u6700\u5927\u4e0a\u9650\uff0c\u901a\u5e38\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u53ef\u7528\u5185\u5b58\u76841\/4\u5927\u5c0f\u3002\u4f46\u662f\u5f00\u53d1\u8fc7\u7a0b\u4e2d\uff0c\u901a\u5e38\u4f1a\u5c06\u00a0-Xms \u4e0e -Xmx\u4e24\u4e2a\u53c2\u6570\u7684\u914d\u7f6e\u76f8\u540c\u7684\u503c\uff0c\u5176\u76ee\u7684\u662f\u4e3a\u4e86\u80fd\u591f\u5728java\u5783\u573e\u56de\u6536\u673a\u5236\u6e05\u7406\u5b8c\u5806\u533a\u540e\u4e0d\u9700\u8981\u91cd\u65b0\u5206\u9694\u8ba1\u7b97\u5806\u533a\u7684\u5927\u5c0f\u800c\u6d6a\u8d39\u8d44\u6e90\u3002<\/p>\n\n\n\n

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\u00a0\u00a0\u00a0 -XX:newSize\u3001-XX:MaxnewSize\u3001-Xmn:\u65b0\u751f\u4ee3\u3001\u4e2d\u751f\u4ee3\u3001\u8001\u751f\u4ee3\u3002java\u4e2d\u6bcf\u65b0new\u4e00\u4e2a\u5bf9\u8c61\u6240\u5360\u7528\u7684\u5185\u5b58\u7a7a\u95f4\u5c31\u662f\u65b0\u751f\u4ee3\u7684\u7a7a\u95f4\uff0c\u5f53java\u5783\u573e\u56de\u6536\u673a\u5236\u5bf9\u5806\u533a\u8fdb\u884c\u8d44\u6e90\u56de\u6536\u540e\uff0c\u90a3\u4e9b\u65b0\u751f\u4ee3\u4e2d\u6ca1\u6709\u88ab\u56de\u6536\u7684\u8d44\u6e90\u5c06\u88ab\u8f6c\u79fb\u5230\u4e2d\u751f\u4ee3\uff0c\u4e2d\u751f\u4ee3\u7684\u88ab\u8f6c\u79fb\u5230\u8001\u751f\u4ee3\u3002<\/p>\n\n\n\n

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\u00a0\u00a0\u00a0 2\u3001-XX:MaxnewSize\uff1a\u8868\u793a\u65b0\u751f\u4ee3\u53ef\u88ab\u5206\u914d\u7684\u5185\u5b58\u7684\u6700\u5927\u4e0a\u9650\uff1b\u5f53\u7136\u8fd9\u4e2a\u503c\u5e94\u8be5\u5c0f\u4e8e -Xmx\u7684\u503c\uff1b<\/p>\n\n\n\n

\u00a0\u00a0\u00a0 3\u3001-Xmn\uff1a\u81f3\u4e8e\u8fd9\u4e2a\u53c2\u6570\u5219\u662f\u5bf9 -XX:newSize\u3001-XX:MaxnewSize\u4e24\u4e2a\u53c2\u6570\u7684\u540c\u65f6\u914d\u7f6e\uff0c\u4e5f\u5c31\u662f\u8bf4\u5982\u679c\u901a\u8fc7-Xmn\u6765\u914d\u7f6e\u65b0\u751f\u4ee3\u7684\u5185\u5b58\u5927\u5c0f\uff0c\u90a3\u4e48-XX:newSize = -XX:MaxnewSize = -Xmn\uff0c\u867d\u7136\u4f1a\u5f88\u65b9\u4fbf\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u7684\u662f\u8fd9\u4e2a\u53c2\u6570\u662f\u5728JDK1.4\u7248\u672c\u4ee5\u540e\u624d\u4f7f\u7528\u7684\u3002<\/p>\n\n\n\n

\u4e8c. \u975e\u5806\u533a\u5185\u5b58\u914d\u7f6e\u7684\u4e24\u4e2a\u53c2\u6570\uff1a<\/p>\n\n\n\n

\u00a0\u00a0\u00a0 1\u3001-XX:PermSize\uff1a\u8868\u793a\u975e\u5806\u533a\u521d\u59cb\u5185\u5b58\u5206\u914d\u5927\u5c0f\uff0c\u5176\u7f29\u5199\u4e3apermanent size\uff08\u6301\u4e45\u5316\u5185\u5b58\uff09<\/p>\n\n\n\n

\u00a0\u00a0\u00a0 2\u3001-XX:MaxPermSize\uff1a\u8868\u793a\u5bf9\u975e\u5806\u533a\u5206\u914d\u7684\u5185\u5b58\u7684\u6700\u5927\u4e0a\u9650\u3002<\/p>\n\n\n\n

\u8fd9\u91cc\u9762\u975e\u5e38\u8981\u6ce8\u610f\u7684\u4e00\u70b9\u662f\uff1a\u5728\u914d\u7f6e\u4e4b\u524d\u4e00\u5b9a\u8981\u614e\u91cd\u7684\u8003\u8651\u4e00\u4e0b\u81ea\u8eab\u8f6f\u4ef6\u6240\u9700\u8981\u7684\u975e\u5806\u533a\u5185\u5b58\u5927\u5c0f\uff0c\u56e0\u4e3a\u6b64\u5904\u5185\u5b58\u662f\u4e0d\u4f1a\u88abjava\u5783\u573e\u56de\u6536\u673a\u5236\u8fdb\u884c\u5904\u7406\u7684\u5730\u65b9\u3002\u5e76\u4e14\u66f4\u52a0\u8981\u6ce8\u610f\u7684\u662f\u00a0\u6700\u5927\u5806\u5185\u5b58\u4e0e\u6700\u5927\u975e\u5806\u5185\u5b58\u7684\u548c\u7edd\u5bf9\u4e0d\u80fd\u591f\u8d85\u51fa\u64cd\u4f5c\u7cfb\u7edf\u7684\u53ef\u7528\u5185\u5b58\u3002<\/p>\n\n\n\n

XX:MaxPermSize\u8bbe\u7f6e\u8fc7\u5c0f\u4f1a\u5bfc\u81f4java.lang.OutOfMemoryError: PermGen space \u5c31\u662f\u5185\u5b58\u76ca\u51fa\u3002<\/p>\n\n\n\n

\u8bf4\u8bf4\u4e3a\u4ec0\u4e48\u4f1a\u5185\u5b58\u76ca\u51fa\uff1a<\/p>\n\n\n\n

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\uff082\uff09GC(Garbage Collection)\u4e0d\u4f1a\u5728\u4e3b\u7a0b\u5e8f\u8fd0\u884c\u671f\u5bf9PermGen space\u8fdb\u884c\u6e05\u7406\uff0c\u6240\u4ee5\u5982\u679c\u4f60\u7684APP\u4f1aLOAD\u5f88\u591aCLASS \u7684\u8bdd,\u5c31\u5f88\u53ef\u80fd\u51fa\u73b0PermGen space\u9519\u8bef\u3002<\/p>\n\n\n\n

\u00a0 \u8fd9\u79cd\u9519\u8bef\u5e38\u89c1\u5728web\u670d\u52a1\u5668\u5bf9JSP\u8fdb\u884cpre compile\u7684\u65f6\u5019\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

JVM\u6309\u7167\u5176\u5b58\u50a8\u6570\u636e\u7684\u5185\u5bb9\u5c06\u6240\u9700\u5185\u5b58\u5206\u914d\u4e3a\u5806\u533a\u4e0e\u975e\u5806\u533a\u4e24\u4e2a\u90e8\u5206\uff1a \u6240\u8c13\u5806\u533a\u5373\u4e3a\u901a\u8fc7new\u7684\u65b9\u5f0f\u521b\u5efa\u7684\u5bf9\u8c61\uff08\u7c7b\u5b9e\u4f8b\uff09\u6240\u5360\u7528\u7684\u5185\u5b58\u7a7a\u95f4, \u5806\u662f\u8fd0\u884c\u65f6\u6570\u636e\u533a\u57df\uff1b \u975e\u5806\u533a\u5373\u4e3a\u4ee3\u7801\u3001\u5e38\u91cf\u3001\u5916\u90e8\u8bbf\u95ee\uff08\u5982\u6587\u4ef6\u8bbf\u95ee\u6d41\u6240\u5360\u8d44\u6e90\uff09\u7b49\u3002 \u914d\u7f6e\u5806\u533a\u7684\uff08-Xms \u3001-Xmx\u3001-XX:newSize\u3001-XX:MaxnewSize\u3001-Xmn\uff09 \u914d\u7f6e\u975e\u5806\u533a\uff08-XX:PermSize\u3001-XX:MaxPermSize\uff09 \u4e00. \u5806\u533a\u914d\u7f6e\u53c2\u6570: \u00a0\u00a0\u00a0 1\u3001-Xms 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