{"id":99647,"date":"2020-04-18T01:19:29","date_gmt":"2020-04-17T17:19:29","guid":{"rendered":"http:\/\/4563.org\/?p=99647"},"modified":"2020-04-18T01:19:29","modified_gmt":"2020-04-17T17:19:29","slug":"%e4%b8%80%e4%b8%aa%e6%9c%89%e5%85%b3-jvm-%e5%86%85%e5%ad%98%e5%8d%a0%e7%94%a8%e7%9a%84%e5%b0%8f%e7%99%bd%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=99647","title":{"rendered":"\u4e00\u4e2a\u6709\u5173 JVM \u5185\u5b58\u5360\u7528\u7684\u5c0f\u767d\u95ee\u9898"},"content":{"rendered":"
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\u4e00\u4e2a\u6709\u5173 JVM \u5185\u5b58\u5360\u7528\u7684\u5c0f\u767d\u95ee\u9898 <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : lander <\/span> <\/i> 59<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\u6700\u8fd1\u5728\u5ba2\u6237\u73b0\u573a\u5b9e\u65bd\u67d0\u5b89\u5168\u8f6f\u4ef6\u7684\u7ba1\u7406\u670d\u52a1\u5668\uff0c\u5e95\u5c42\u7528\u7684\u662f Apache+Java+Tomcat\u3002
\u670d\u52a1\u5668\u5206\u914d\u4e86 16GB \u5185\u5b58\uff0c\u88c5\u597d\u4e4b\u540e\u8fd0\u884c\u4e86\u4e00\u6bb5\u65f6\u95f4\uff0c\u6700\u8fd1\u6536\u5230\u544a\u8b66\u8bf4 JVM free memory \u5c0f\u4e8e 30%\uff08\u9608\u503c\u662f 30%\uff09\uff1a
JVM max memory: 8096MB
JVM total memory: 1072MB
JVM used memory: 890MB
JVM free memory: 182MB
JVM free memory \u767e\u5206\u6bd4\uff1a17%
JVM used memory \u767e\u5206\u6bd4\uff1a83%<\/p>\n

\u6bd4\u8f83\u7591\u60d1\u7684\u662f\u4e3a\u5565 JVM total memory \u4e3a\u5565\u662f 1072 \uff1f\u8fd9\u4e2a JVM total memory \u662f\u6307 JVM heap memory + non-heap memory \u5417\uff1f
\u63d0\u524d\u8c22\u8fc7 <\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (4<\/span>) <\/div>\n
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  • \n
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    \u8cc7\u6df1\u5927\u4f6c : falsemask <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4ece\u4f60\u6570\u5b57\u6765\u770b 1072=890+182 \u5427\u3002\u4e0d\u77e5\u9053\u4f60\u8fd9\u4e2a\u662f\u600e\u4e48\u7edf\u8ba1\u7684\uff0c\u53ef\u4ee5\u628a jvm \u53c2\u6570\u8d34\u51fa\u6765\uff0c\u6216\u8005 jmap -heap pid \u770b\u4e00\u4e0b <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : Raymon111111 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6572\u4e00\u4e0b jstat -gc <pid> 1000 \u770b\u770b\u8f93\u51fa <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : lander <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @Raymon111111 @falsemask
    \u662f\u8fd9\u4e2a\u7ba1\u7406\u5e73\u53f0\u81ea\u5e26\u7684\u4e00\u4e2a\u529f\u80fd\u81ea\u52a8\u68c0\u6d4b\u7684\u7ed3\u679c\u3002
    \u53e6\u5916\u8fd9\u662f\u57fa\u4e8e Windows \u7684\u5e73\u53f0\uff0c\u6211\u627e\u4e86\u4e0b\u597d\u50cf\u53ea\u6709 jconsole.bat \uff0c\u6ca1\u6709\u4e24\u4f4d\u6240\u8bf4\u7684 jstat \u548c jmap \u5de5\u5177\u3002\u3002\u800c\u4e14 jconsole \u9ed8\u8ba4\u7981\u7528\u4e86\u8fdc\u7a0b\u7ba1\u7406\uff0c\u9700\u8981\u4fee\u6539 management.properties \u6587\u4ef6\u256e(\u256f\u25bd\u2570)\u256d\u7136\u540e\u91cd\u542f tomcat\uff0c\u6211\u627e\u65f6\u95f4\u7533\u8bf7\u4e2a\u53d8\u66f4\u518d\u53d1\u7ed9\u4e24\u4f4d jconsole \u91cc\u7684\u8fd0\u884c\u7ed3\u679c\u3002
    \u5982\u679c\u6709\u66f4\u597d\u7684\u529e\u6cd5\u8bf7\u518d\u968f\u65f6\u6c9f\u901a\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : falsemask <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @lander jstat \u548c jmap \u90fd\u662f jdk \u91cc\u9762\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u4e00\u4e2a\u6709\u5173 JVM \u5185\u5b58\u5360\u7528\u7684\u5c0f\u767d\u95ee…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/99647"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=99647"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/99647\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=99647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=99647"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=99647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}