{"id":1241,"date":"2026-01-04T20:02:14","date_gmt":"2026-01-04T12:02:14","guid":{"rendered":"https:\/\/www.52runoob.com\/?p=1241"},"modified":"2026-01-04T20:03:19","modified_gmt":"2026-01-04T12:03:19","slug":"java%e5%a0%86%e8%bd%ac%e5%82%a8%e6%96%87%e4%bb%b6%e4%b9%8b1-6g%e5%a4%a7%e6%96%87%e4%bb%b6%e5%a4%84%e7%90%86%e5%ae%8c%e6%95%b4%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/www.52runoob.com\/index.php\/2026\/01\/04\/java%e5%a0%86%e8%bd%ac%e5%82%a8%e6%96%87%e4%bb%b6%e4%b9%8b1-6g%e5%a4%a7%e6%96%87%e4%bb%b6%e5%a4%84%e7%90%86%e5%ae%8c%e6%95%b4%e6%8c%87%e5%8d%97\/","title":{"rendered":"Java\u5806\u8f6c\u50a8\u6587\u4ef6\u4e4b1.6G\u5927\u6587\u4ef6\u5904\u7406\u5b8c\u6574\u6307\u5357"},"content":{"rendered":"\n<p>\u660e\u767d\u4e86\uff0c\u4f60\u60f3\u8981\u4e00\u4efd <strong>Java \u5806\u8f6c\u50a8\uff08Heap Dump\uff09\u5927\u6587\u4ef6\uff08\u5982 1.6G\uff09\u5904\u7406\u7684\u5b8c\u6574\u6307\u5357<\/strong>\uff0c\u5305\u62ec <strong>\u751f\u6210\u3001\u5206\u6790\u3001\u5de5\u5177\u3001\u4f18\u5316\u65b9\u6848<\/strong>\uff0c\u786e\u4fdd\u5373\u4f7f\u662f\u5927\u6587\u4ef6\u4e5f\u80fd\u987a\u5229\u5206\u6790\u800c\u4e0d\u5d29\u6e83\u3002\u4e0b\u9762\u7ed9\u4f60\u6574\u7406\u4e00\u4efd\u7cfb\u7edf\u6307\u5357\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">Java \u5806\u8f6c\u50a8\u6587\u4ef6 (Heap Dump) \u5927\u6587\u4ef6\u5904\u7406\u5b8c\u6574\u6307\u5357<\/h1>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">1. \u5806\u8f6c\u50a8\u6587\u4ef6\u7b80\u4ecb<\/h2>\n\n\n\n<p><strong>Heap Dump\uff08.hprof\uff09<\/strong> \u662f JVM \u5185\u5b58\u5feb\u7167\u6587\u4ef6\uff0c\u8bb0\u5f55\u4e86\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>JVM \u5806\u4e2d\u5bf9\u8c61\u5b9e\u4f8b\u3001\u7c7b\u578b\u3001\u5927\u5c0f<\/li>\n\n\n\n<li>\u5bf9\u8c61\u95f4\u5f15\u7528\u5173\u7cfb<\/li>\n\n\n\n<li>\u7c7b\u52a0\u8f7d\u4fe1\u606f<\/li>\n\n\n\n<li>GC Root\u3001\u5783\u573e\u5bf9\u8c61\u60c5\u51b5<\/li>\n<\/ul>\n\n\n\n<p>\u4f5c\u7528\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5185\u5b58\u6cc4\u6f0f\u6392\u67e5<\/strong><\/li>\n\n\n\n<li><strong>\u5185\u5b58\u5360\u7528\u5206\u6790<\/strong><\/li>\n\n\n\n<li><strong>GC \u8c03\u4f18\u53c2\u8003<\/strong><\/li>\n<\/ul>\n\n\n\n<p>\u5927\u6587\u4ef6\uff08\u5982 1G+\uff09\u4f1a\u56e0\u4e3a\u5bf9\u8c61\u591a\u3001\u5806\u5927\u800c\u751f\u6210\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u751f\u6210 Heap Dump \u6587\u4ef6\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 JVM \u53c2\u6570\u751f\u6210<\/h3>\n\n\n\n<p>\u5728\u542f\u52a8 Java \u5e94\u7528\u65f6\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n-XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=\/path\/to\/heapdump.hprof\n\n<\/pre><\/div>\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4f5c\u7528<\/strong>\uff1a\u5728\u53d1\u751f OOM\uff08\u5185\u5b58\u6ea2\u51fa\uff09\u65f6\u81ea\u52a8\u751f\u6210\u5806\u8f6c\u50a8<\/li>\n\n\n\n<li><strong>\u4f18\u70b9<\/strong>\uff1a\u65e0\u9700\u624b\u52a8\u89e6\u53d1<\/li>\n\n\n\n<li><strong>\u6ce8\u610f<\/strong>\uff1a\u8def\u5f84\u78c1\u76d8\u7a7a\u95f4\u9700\u5145\u8db3<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2.2 jcmd \u547d\u4ee4\u751f\u6210<\/h3>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\njcmd &amp;lt;pid&gt; GC.heap_dump \/path\/to\/heapdump.hprof\n\n<\/pre><\/div>\n\n\n<ul class=\"wp-block-list\">\n<li><code>&lt;pid><\/code>\uff1aJava \u8fdb\u7a0b ID<\/li>\n\n\n\n<li>\u751f\u6210\u8fc7\u7a0b\u53ef\u80fd\u5360\u7528\u8f83\u5927 CPU \u548c\u78c1\u76d8 IO<\/li>\n\n\n\n<li>\u9002\u5408\u751f\u4ea7\u73af\u5883\u6392\u67e5\u5185\u5b58\u95ee\u9898<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2.3 jmap \u547d\u4ee4\u751f\u6210<\/h3>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\njmap -dump:format=b,file=\/path\/to\/heapdump.hprof &amp;lt;pid&gt;\n\n<\/pre><\/div>\n\n\n<ul class=\"wp-block-list\">\n<li><code>-dump:format=b<\/code> \u8868\u793a\u4e8c\u8fdb\u5236\u683c\u5f0f<\/li>\n\n\n\n<li>\u6ce8\u610f\uff1a\u5bf9\u5927\u5806\uff08>2G\uff09\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8fdb\u7a0b\u77ed\u6682\u5361\u987f<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u5206\u6790\u5927\u5806\u8f6c\u50a8\u6587\u4ef6\u5de5\u5177<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 Eclipse MAT\uff08Memory Analyzer Tool\uff09<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b98\u65b9\u4e0b\u8f7d\uff1a<a href=\"https:\/\/www.eclipse.org\/mat\/\">https:\/\/www.eclipse.org\/mat\/<\/a><\/li>\n\n\n\n<li><strong>\u7279\u70b9<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u652f\u6301 1G+ \u5806\u8f6c\u50a8\u5206\u6790<\/li>\n\n\n\n<li>\u5206\u6790\u5bf9\u8c61\u5360\u7528\u3001\u6cc4\u6f0f\u7591\u70b9<\/li>\n\n\n\n<li>\u652f\u6301 <strong>OQL \u67e5\u8be2\u5bf9\u8c61<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u4f18\u5316\u5927\u6587\u4ef6<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u589e\u52a0\u542f\u52a8 JVM \u5185\u5b58\uff1a<code>MemoryAnalyzer.ini -Xmx4g<\/code><\/li>\n\n\n\n<li>\u4f7f\u7528 <strong>Dominator Tree<\/strong> \u89c6\u56fe\u67e5\u627e\u5360\u7528\u5927\u5bf9\u8c61<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3.2 VisualVM + VisualGC \u63d2\u4ef6<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>JDK \u81ea\u5e26 <code>jvisualvm<\/code><\/li>\n\n\n\n<li>\u6253\u5f00 Heap Dump \u6587\u4ef6\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5bf9\u5927\u6587\u4ef6\u53ef\u80fd\u54cd\u5e94\u6162<\/li>\n\n\n\n<li>\u53ef\u642d\u914d <strong>Plugins \u2192 VisualGC<\/strong> \u4f18\u5316\u5206\u6790<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3.3 JProfiler \/ YourKit\uff08\u5546\u4e1a\u7248\uff09<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9ad8\u6027\u80fd\u5806\u5206\u6790\u5de5\u5177\uff0c\u9002\u5408\u5927\u6587\u4ef6<\/li>\n\n\n\n<li>\u652f\u6301\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5927\u5806\u8f6c\u50a8\u5feb\u901f\u7d22\u5f15<\/li>\n\n\n\n<li>\u67e5\u627e\u6cc4\u6f0f\u8def\u5f84<\/li>\n\n\n\n<li>\u5206\u6790\u7c7b\u52a0\u8f7d\u5668\u5f15\u7528<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. \u5927\u6587\u4ef6\u5206\u6790\u4f18\u5316\u6280\u5de7<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u589e\u52a0\u5206\u6790\u5de5\u5177 JVM \u5185\u5b58<\/strong>\n<ul class=\"wp-block-list\">\n<li>Heap Dump \u5927\u5c0f \u00d7 2 \u81f3 \u00d73 \u7684\u5185\u5b58\u624d\u80fd\u987a\u5229\u6253\u5f00<\/li>\n\n\n\n<li>Eclipse MAT \u793a\u4f8b\uff1a<code>-Xmx8g<\/code><\/li>\n\n\n\n<li>\u542f\u52a8 16G \u5185\u5b58\u7684\u673a\u5668\u66f4\u5b89\u5168<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u538b\u7f29 hprof \u6587\u4ef6<\/strong>\n<ul class=\"wp-block-list\">\n<li>MAT \u652f\u6301 <code>.hprof.gz<\/code><\/li>\n\n\n\n<li>\u53ef\u4ee5\u8282\u7701\u78c1\u76d8\u7a7a\u95f4<\/li>\n\n\n\n<li>\u6253\u5f00\u65f6 MAT \u4f1a\u81ea\u52a8\u89e3\u538b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5206\u533a\u5206\u6790<\/strong>\uff08\u9488\u5bf9\u8d85\u5927\u5806 >5G\uff09\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528 <code>jhat<\/code> \u6216 MAT \u5206\u6790\u90e8\u5206\u5bf9\u8c61<\/li>\n\n\n\n<li>\u5229\u7528 <strong>OQL \u67e5\u8be2<\/strong> \u53ea\u52a0\u8f7d\u611f\u5174\u8da3\u7684\u7c7b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8fc7\u6ee4\u65e0\u5173\u7c7b<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u6392\u9664\u7cfb\u7edf\u7c7b\u6216\u65e0\u5173\u7b2c\u4e09\u65b9\u5e93<\/li>\n\n\n\n<li>\u53ea\u5173\u6ce8\u4e1a\u52a1\u5305\u5bf9\u8c61<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u4f7f\u7528\u547d\u4ee4\u884c\u5de5\u5177\u5feb\u901f\u7edf\u8ba1<\/strong><code>jhat -J-Xmx4g \/path\/to\/heapdump.hprof<\/code>\n<ul class=\"wp-block-list\">\n<li>\u53ef\u5feb\u901f\u6d4f\u89c8\u5927\u6587\u4ef6<\/li>\n\n\n\n<li>\u4e0d\u5fc5\u4e00\u6b21\u6027\u52a0\u8f7d GUI<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">5. \u5e38\u89c1\u95ee\u9898\u53ca\u89e3\u51b3\u65b9\u6848<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u95ee\u9898<\/th><th>\u539f\u56e0<\/th><th>\u89e3\u51b3\u65b9\u6848<\/th><\/tr><\/thead><tbody><tr><td>Eclipse MAT \u6253\u4e0d\u5f00 1.6G hprof<\/td><td>\u9ed8\u8ba4\u5185\u5b58\u4e0d\u8db3<\/td><td>\u589e\u52a0 -Xmx \u5185\u5b58\u5230 4~8G<\/td><\/tr><tr><td>OOM \u751f\u6210 hprof<\/td><td>\u5806\u672c\u8eab\u5df2\u63a5\u8fd1\u6ee1<\/td><td>\u4f7f\u7528 <code>-XX:HeapDumpPath<\/code> \u6307\u5b9a\u76d8\u7a7a\u95f4\u5145\u8db3\u7684\u8def\u5f84<\/td><\/tr><tr><td>jmap \u5361\u4f4f<\/td><td>\u5927\u5806\u5199\u5165\u78c1\u76d8\u6162<\/td><td>\u5148\u5728\u975e\u9ad8\u5cf0\u671f\u751f\u6210\uff1b\u786e\u4fdd\u78c1\u76d8 SSD<\/td><\/tr><tr><td>\u5206\u6790 GUI \u54cd\u5e94\u6162<\/td><td>\u6587\u4ef6\u592a\u5927<\/td><td>\u4f7f\u7528 OQL \u8fc7\u6ee4\uff1b\u53ea\u5206\u6790\u90e8\u5206\u5bf9\u8c61<\/td><\/tr><tr><td>\u65e0\u6cd5\u627e\u5230\u6cc4\u6f0f\u5bf9\u8c61<\/td><td>\u5806\u8f6c\u50a8\u8fc7\u671f<\/td><td>\u751f\u6210\u8f6c\u50a8\u65f6\u786e\u4fdd JVM \u6b63\u5e38\u8fd0\u884c\uff1b\u6700\u597d\u5728\u95ee\u9898\u51fa\u73b0\u65f6\u751f\u6210<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">6. \u5b9e\u6218\u5206\u6790\u6b65\u9aa4\uff08\u793a\u4f8b\uff09<\/h2>\n\n\n\n<p>\u5047\u8bbe\u8981\u5206\u6790 1.6G Heap Dump\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u751f\u6210 Heap Dump\uff1a<code>jcmd 12345 GC.heap_dump \/tmp\/heapdump_1.6G.hprof<\/code><\/li>\n\n\n\n<li>\u542f\u52a8 MAT \u5e76\u5206\u914d 8G \u5185\u5b58\uff1a<code>MemoryAnalyzer -Xmx8g<\/code><\/li>\n\n\n\n<li>\u6253\u5f00 Heap Dump \u6587\u4ef6<\/li>\n\n\n\n<li>\u67e5\u770b <strong>Histogram \u2192 Dominator Tree<\/strong><\/li>\n\n\n\n<li>\u627e\u51fa\u5360\u7528\u5927\u5bf9\u8c61\uff0c\u4f8b\u5982\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5927\u96c6\u5408\uff08ArrayList\u3001HashMap\uff09<\/li>\n\n\n\n<li>\u4e1a\u52a1\u5bf9\u8c61\u7f13\u5b58<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u4f7f\u7528 OQL \u67e5\u8be2\u7279\u5b9a\u5305\uff1a<code>SELECT * FROM com.example.service.*<\/code><\/li>\n\n\n\n<li>\u786e\u8ba4\u6cc4\u6f0f\u94fe\u8def \u2192 \u8c03\u6574\u4ee3\u7801 \/ GC \u914d\u7f6e<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">7. \u4f18\u5316\u5efa\u8bae<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u751f\u6210 hprof \u65f6\u5c3d\u91cf\u5728\u7a7a\u95f2\u65f6\u95f4<\/strong>\uff0c\u907f\u514d\u5f71\u54cd\u751f\u4ea7\u670d\u52a1<\/li>\n\n\n\n<li><strong>\u5927\u5806\u5206\u6790\u63a8\u8350 SSD<\/strong>\uff0c\u52a0\u5feb\u6587\u4ef6\u8bfb\u53d6\u901f\u5ea6<\/li>\n\n\n\n<li><strong>\u5206\u6790\u524d\u5148\u8fc7\u6ee4\u65e0\u5173\u5bf9\u8c61<\/strong>\uff0c\u51cf\u5c11\u5185\u5b58\u6d88\u8017<\/li>\n\n\n\n<li><strong>\u5b9a\u671f\u76d1\u63a7 JVM \u5185\u5b58<\/strong>\uff0c\u907f\u514d\u9891\u7e41\u751f\u6210\u5927\u5806\u8f6c\u50a8<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u2705 <strong>\u603b\u7ed3<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u751f\u6210\u5927\u5806\u8f6c\u50a8\uff1a<code>-XX:+HeapDumpOnOutOfMemoryError<\/code> \u6216 <code>jcmd \/ jmap<\/code><\/li>\n\n\n\n<li>\u6253\u5f00\u5206\u6790\u5de5\u5177\uff1aEclipse MAT\u3001VisualVM\u3001JProfiler<\/li>\n\n\n\n<li>\u5927\u6587\u4ef6\u4f18\u5316\uff1a\n<ul class=\"wp-block-list\">\n<li>\u589e\u52a0\u5206\u6790\u5de5\u5177\u5185\u5b58<\/li>\n\n\n\n<li>\u538b\u7f29\u6216\u5206\u533a\u5206\u6790<\/li>\n\n\n\n<li>\u8fc7\u6ee4\u65e0\u5173\u7c7b<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u67e5\u627e\u95ee\u9898\uff1a\n<ul class=\"wp-block-list\">\n<li>Histogram\u3001Dominator Tree\u3001OQL<\/li>\n\n\n\n<li>\u786e\u8ba4\u6cc4\u6f0f\u5bf9\u8c61\u548c GC Root \u94fe<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u660e\u767d\u4e86\uff0c\u6211\u6765\u5e2e\u4f60\u753b\u4e00\u5f20 <strong>Java Heap Dump\uff081.6G \u5927\u6587\u4ef6\uff09\u5206\u6790\u5168\u6d41\u7a0b\u56fe<\/strong>\uff0c\u53ef\u89c6\u5316\u5c55\u793a <strong>\u751f\u6210 \u2192 \u5de5\u5177 \u2192 \u4f18\u5316 \u2192 \u5206\u6790 \u2192 \u89e3\u51b3\u95ee\u9898<\/strong> \u7684\u5b8c\u6574\u6d41\u7a0b\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Java Heap Dump \u5927\u6587\u4ef6\u5206\u6790\u6d41\u7a0b\u56fe\uff08\u6587\u5b57\u7248\u793a\u610f\uff09<\/h3>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502       \u751f\u6210 Heap Dump \u6587\u4ef6       \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n                \u2502\n  \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n  \u2502 \u65b9\u6cd5 1\uff1aOOM \u81ea\u52a8\u751f\u6210       \u2502\n  \u2502 -XX:+HeapDumpOnOutOfMemoryError \u2502\n  \u2502 -XX:HeapDumpPath=\/path    \u2502\n  \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n                \u2502\n  \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n  \u2502 \u65b9\u6cd5 2\uff1ajcmd \/ jmap \u624b\u52a8\u751f\u6210 \u2502\n  \u2502 jcmd &amp;lt;pid&gt; GC.heap_dump     \u2502\n  \u2502 jmap -dump:format=b         \u2502\n  \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n                \u2502\n                \u25bc\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502       \u5206\u6790\u5de5\u5177\u9009\u62e9\u4e0e\u4f18\u5316       \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n                \u2502\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n \u2502 Eclipse MAT \/ VisualVM \/    \u2502\n \u2502 JProfiler \/ YourKit          \u2502\n \u2502 JVM \u5206\u914d\u8db3\u591f\u5185\u5b58 (-Xmx8G+)   \u2502\n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n                \u2502\n                \u25bc\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502        Heap Dump \u6253\u5f00\/\u52a0\u8f7d       \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n                \u2502\n                \u25bc\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502          \u4f18\u5316\u5206\u6790\u6b65\u9aa4          \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n                \u2502\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 1. \u5386\u53f2\u8fc7\u6ee4 \/ \u5206\u533a\u5206\u6790         \u2502\n\u2502 2. \u53ea\u5206\u6790\u4e1a\u52a1\u5305\u5bf9\u8c61            \u2502\n\u2502 3. \u4f7f\u7528 OQL \u67e5\u8be2\u7279\u5b9a\u7c7b         \u2502\n\u2502 4. Dominator Tree \u67e5\u627e\u5927\u5bf9\u8c61    \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n                \u2502\n                \u25bc\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502        \u5185\u5b58\u95ee\u9898\u5b9a\u4f4d\u4e0e\u89e3\u51b3       \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n                \u2502\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 1. \u627e\u51fa\u5360\u7528\u5927\u5bf9\u8c61\/\u96c6\u5408        \u2502\n\u2502 2. \u786e\u8ba4\u6cc4\u6f0f\u94fe\u8def\u4e0e GC Root      \u2502\n\u2502 3. \u4f18\u5316\u4ee3\u7801\/\u7f13\u5b58\/GC \u914d\u7f6e       \u2502\n\u2502 4. \u9a8c\u8bc1\u95ee\u9898\u89e3\u51b3               \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd39 \u6d41\u7a0b\u8bf4\u660e<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u751f\u6210 Heap Dump<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u53ef\u901a\u8fc7 JVM \u53c2\u6570\u81ea\u52a8\u751f\u6210\u6216\u547d\u4ee4\u624b\u52a8\u751f\u6210<\/li>\n\n\n\n<li>\u5927\u6587\u4ef6\u9700\u4fdd\u8bc1\u78c1\u76d8\u7a7a\u95f4\u5145\u8db3<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u9009\u62e9\u5206\u6790\u5de5\u5177<\/strong>\n<ul class=\"wp-block-list\">\n<li>Eclipse MAT\u3001VisualVM\u3001JProfiler<\/li>\n\n\n\n<li>\u5185\u5b58\u914d\u7f6e >= Heap Dump \u6587\u4ef6\u5927\u5c0f\u7684 2~3 \u500d<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u4f18\u5316\u5206\u6790<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u538b\u7f29\u6587\u4ef6\u3001\u8fc7\u6ee4\u65e0\u5173\u7c7b\u3001\u4f7f\u7528 OQL \u6216 Dominator Tree<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u5b9a\u4f4d\u95ee\u9898<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u67e5\u627e\u5927\u5bf9\u8c61\u3001\u5185\u5b58\u6cc4\u6f0f\u3001\u7f13\u5b58\u5360\u7528<\/li>\n\n\n\n<li>\u786e\u8ba4 GC Root \u548c\u5f15\u7528\u94fe<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u89e3\u51b3\u95ee\u9898<\/strong>\n<ul class=\"wp-block-list\">\n<li>\u4ee3\u7801\u4f18\u5316\u3001\u7f13\u5b58\u6e05\u7406\u3001GC \u8c03\u6574<\/li>\n\n\n\n<li>\u518d\u6b21\u751f\u6210 Heap Dump \u9a8c\u8bc1<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n","protected":false},"excerpt":{"rendered":"<p>\u660e\u767d\u4e86\uff0c\u4f60\u60f3\u8981\u4e00\u4efd Java \u5806\u8f6c\u50a8\uff08Heap Dump\uff09\u5927\u6587\u4ef6\uff08\u5982 1.6G\uff09&#8230; 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