{"id":10475,"date":"2023-11-28T21:35:48","date_gmt":"2023-11-28T13:35:48","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10475"},"modified":"2023-12-07T11:30:32","modified_gmt":"2023-12-07T03:30:32","slug":"jvm-diao-you-shuo-shuo-ru-he-cha-kanjvm-can-shu-mo","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-diao-you-shuo-shuo-ru-he-cha-kanjvm-can-shu-mo\/","title":{"rendered":"JVM\u8c03\u4f18\uff0c\u8bf4\u8bf4\u5982\u4f55\u67e5\u770bJVM\u53c2\u6570\u9ed8\u8ba4\u503c\uff1f"},"content":{"rendered":"<p>\u5728 Java \u865a\u62df\u673a\uff08JVM\uff09\u8c03\u4f18\u8fc7\u7a0b\u4e2d\uff0c\u4e86\u89e3 JVM \u53c2\u6570\u7684\u9ed8\u8ba4\u503c\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u67e5\u770b JVM \u53c2\u6570\u9ed8\u8ba4\u503c\u7684\u65b9\u6cd5\uff1a<\/p>\n<ol>\n<li>\n<strong>\u4f7f\u7528 <code>java -XX:+PrintFlagsFinal<\/code> \u547d\u4ee4\uff1a<\/strong><br \/>\n\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\u53ef\u4ee5\u6253\u5370\u6240\u6709\u7684 JVM \u53c2\u6570\u53ca\u5176\u9ed8\u8ba4\u503c\uff1a<\/p>\n<pre><code class=\"language-bash\">java -XX:+PrintFlagsFinal\n<\/code><\/pre>\n<p>\u8fd9\u4f1a\u8f93\u51fa\u6240\u6709\u7684 JVM \u53c2\u6570\u53ca\u5176\u6700\u7ec8\u503c\uff0c\u5305\u62ec\u9ed8\u8ba4\u503c\u548c\u901a\u8fc7\u547d\u4ee4\u884c\u6216\u914d\u7f6e\u6587\u4ef6\u4fee\u6539\u8fc7\u7684\u503c\u3002\n<\/li>\n<li>\n<strong>\u4f7f\u7528 <code>jinfo<\/code> \u5de5\u5177\uff1a<\/strong><br \/>\n<code>jinfo<\/code> \u662f JDK \u81ea\u5e26\u7684\u4e00\u4e2a\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u4e8e\u67e5\u770b\u548c\u8c03\u6574 Java \u8fdb\u7a0b\u7684\u8fd0\u884c\u65f6\u53c2\u6570\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u67e5\u770b\u6240\u6709\u53c2\u6570\uff1a<\/p>\n<pre><code class=\"language-bash\">jinfo -flags &lt;pid&gt;\n<\/code><\/pre>\n<p>\u5176\u4e2d <code>&lt;pid&gt;<\/code> \u662f Java \u8fdb\u7a0b\u7684\u8fdb\u7a0b\u53f7\u3002\n<\/li>\n<li>\n<strong>\u67e5\u770b\u6587\u6863\uff1a<\/strong><br \/>\n\u9605\u8bfb\u76f8\u5173\u6587\u6863\uff0c\u4e0d\u540c\u7248\u672c\u7684 JDK \u90fd\u63d0\u4f9b\u4e86\u8be6\u7ec6\u7684\u6587\u6863\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u5404\u79cd JVM \u53c2\u6570\u7684\u8bf4\u660e\u548c\u9ed8\u8ba4\u503c\u3002\u4f60\u53ef\u4ee5\u67e5\u9605\u5b98\u65b9\u6587\u6863\u6216\u76f8\u5e94\u7248\u672c\u7684 Release Notes\u3002\n<\/li>\n<li>\n<strong>\u67e5\u770b\u6e90\u4ee3\u7801\uff1a<\/strong><br \/>\n\u5bf9\u4e8e\u5f00\u653e\u6e90\u4ee3\u7801\u7684 JDK\uff0c\u4f60\u4e5f\u53ef\u4ee5\u67e5\u770b\u6e90\u4ee3\u7801\u6765\u83b7\u53d6\u53c2\u6570\u7684\u9ed8\u8ba4\u503c\u3002JVM \u53c2\u6570\u901a\u5e38\u5728 HotSpot \u865a\u62df\u673a\u7684\u6e90\u4ee3\u7801\u4e2d\u53ef\u4ee5\u627e\u5230\u3002\u4f8b\u5982\uff0cHotSpot \u7684\u6e90\u4ee3\u7801\u5728 OpenJDK \u9879\u76ee\u4e2d\u662f\u5f00\u653e\u7684\uff0c\u4f60\u53ef\u4ee5\u67e5\u770b <code>src\/share\/vm\/runtime\/arguments.cpp<\/code> \u6587\u4ef6\u3002\n<\/li>\n<\/ol>\n<p>\u603b\u7684\u6765\u8bf4\uff0c\u4f7f\u7528 <code>-XX:+PrintFlagsFinal<\/code> \u6216 <code>jinfo<\/code> \u5de5\u5177\u662f\u6700\u76f4\u63a5\u548c\u65b9\u4fbf\u7684\u65b9\u5f0f\uff0c\u80fd\u591f\u5feb\u901f\u83b7\u53d6\u5f53\u524d\u8fd0\u884c\u4e2d Java \u8fdb\u7a0b\u7684 JVM \u53c2\u6570\u9ed8\u8ba4\u503c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Java \u865a\u62df\u673a\uff08JVM\uff09\u8c03\u4f18\u8fc7\u7a0b\u4e2d\uff0c\u4e86\u89e3 JVM \u53c2\u6570\u7684\u9ed8\u8ba4\u503c\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u67e5\u770b JVM \u53c2\u6570 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[119],"tags":[],"class_list":["post-10475","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10475","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=10475"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10475\/revisions"}],"predecessor-version":[{"id":16846,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10475\/revisions\/16846"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10475"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10475"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10475"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}