{"id":31269,"date":"2023-12-28T17:31:48","date_gmt":"2022-12-28T04:44:59","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6%e5%99%a8%e5%92%8c%e5%86%85%e5%ad%98%e6%ba%a2%e5%87%ba%e9%94%99%e8%af%af%e3%80%82\/"},"modified":"2025-08-12T23:09:36","modified_gmt":"2025-08-12T15:09:36","slug":"java%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6%e5%99%a8%e5%92%8c%e5%86%85%e5%ad%98%e6%ba%a2%e5%87%ba%e9%94%99%e8%af%af%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%9e%83%e5%9c%be%e5%9b%9e%e6%94%b6%e5%99%a8%e5%92%8c%e5%86%85%e5%ad%98%e6%ba%a2%e5%87%ba%e9%94%99%e8%af%af%e3%80%82\/","title":{"rendered":"Java\u7684\u5783\u573e\u56de\u6536\u5668\u548c\u5185\u5b58\u6ea2\u51fa\u9519\u8bef"},"content":{"rendered":"<h2>\u5806\u533a\u662f\u4ec0\u4e48\u610f\u601d\uff1f<\/h2>\n<p>\u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\uff0cJVM\u4f1a\u4e3a\u4e86\u751f\u6210\u7684\u5bf9\u8c61\u5206\u914d\u4e00\u5757\u88ab\u79f0\u4e3a\u5806\u533a\u7684\u5185\u5b58\u7a7a\u95f4\u3002<\/p>\n<h2>\u5783\u573e\u6536\u96c6\u5458\u662f<\/h2>\n<p>\u5783\u573e\u6536\u96c6\u5668\uff08GC\uff09\u4f1a\u81ea\u52a8\u7ba1\u7406\u5e94\u7528\u7a0b\u5e8f\u7684\u52a8\u6001\u5185\u5b58\u5206\u914d\u8bf7\u6c42\u3002\u5728Java HotSpot\u7684\u5783\u573e\u6536\u96c6\u5668\u4e2d\uff0c\u4f7f\u7528\u4e86\u5404\u79cd\u6280\u672f\u6765\u63d0\u9ad8\u8fd9\u4e9b\u64cd\u4f5c\u7684\u6548\u7387\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4e16\u4ee3\u5225\u306e\u30b9\u30ab\u30d9\u30f3\u30b8\u3092\u30a8\u30fc\u30b8\u30f3\u30b0\u3068\u3068\u3082\u306b\u4f7f\u7528\u3057\u3066\u3001\u518d\u5229\u7528\u53ef\u80fd\u3067\u5927\u304d\u306a\u30e1\u30e2\u30ea\u30fc\u9818\u57df\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30d2\u30fc\u30d7\u5185\u306e\u9818\u57df\u306b\u96c6\u4e2d\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u8907\u6570\u306e\u30b9\u30ec\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u4e26\u5217\u64cd\u4f5c\u3092\u30a2\u30b0\u30ec\u30c3\u30b7\u30d6\u306b\u5b9f\u884c\u3059\u308b\u304b\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u540c\u6642\u306b\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u3067\u9577\u6642\u9593\u304b\u304b\u308b\u64cd\u4f5c\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30e9\u30a4\u30d6\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5727\u7e2e\u3059\u308b\u3053\u3068\u3067\u3001\u9023\u7d9a\u7684\u306a\u5927\u304d\u306a\u7a7a\u304d\u30e1\u30e2\u30ea\u30fc\u306e\u30ea\u30ab\u30d0\u30ea\u3092\u8a66\u884c\u3057\u307e\u3059\u3002<\/ul>\n<h2>\u5185\u5b58\u6ea2\u51fa\u9519\u8bef<\/h2>\n<p>\u7531\u4e8e\u5185\u5b58\u4e0d\u8db3\uff0cJava\u865a\u62df\u673a\u65e0\u6cd5\u5206\u914d\u5bf9\u8c61\uff0c\u5f53\u5783\u573e\u6536\u96c6\u5668\u65e0\u6cd5\u518d\u5206\u914d\u53ef\u7528\u5185\u5b58\u65f6\uff0c\u5c06\u5f15\u53d1OutOfMemoryError\u3002\u8fd9\u53ef\u80fd\u5bfc\u81f4\u865a\u62df\u673a\u6784\u5efaOutOfMemoryError\u5bf9\u8c61\uff0c\u4eff\u4f5b\u7981\u7528\u4e86\u6291\u5236\u6216\u65e0\u6cd5\u5199\u5165\u5806\u6808\u8ddf\u8e2a\uff0c\u6216\u8005\u662f\u4e24\u8005\u540c\u65f6\u53d1\u751f\u3002<\/p>\n<h2>\u786e\u8ba4\u5b9e\u65bd<\/h2>\n<p>\u6837\u672c\u4ee3\u7801<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">OOMTest<\/span> <span class=\"o\">{<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">i<\/span><span class=\"o\">=<\/span><span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">List<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">String<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">list<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayList<\/span><span class=\"o\">&lt;&gt;();<\/span>\r\n    <span class=\"nc\">String<\/span> <span class=\"n\">str<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"OOM and GC\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">while<\/span><span class=\"o\">(<\/span><span class=\"kc\">true<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"n\">list<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"n\">str<\/span><span class=\"o\">);<\/span>\r\n      <span class=\"n\">str<\/span> <span class=\"o\">=<\/span> <span class=\"n\">str<\/span> <span class=\"o\">+<\/span> <span class=\"n\">str<\/span><span class=\"o\">;<\/span>\r\n      <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"n\">i<\/span><span class=\"o\">++;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8fd0\u884c\u9009\u9879<\/p>\n<pre class=\"post-pre\"><code>-Xms5m -Xmx5m -XX:+PrintGCDetails\r\n<\/code><\/pre>\n<p>\u6267\u884c\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>[GC (Allocation Failure) [PSYoungGen: 1024K-&gt;505K(1536K)] 1024K-&gt;741K(5632K), 0.0028444 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \r\n[GC (Allocation Failure) [PSYoungGen: 1376K-&gt;500K(1536K)] 1612K-&gt;1139K(5632K), 0.0006508 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \r\n[GC (Allocation Failure) [PSYoungGen: 1320K-&gt;500K(1536K)] 1960K-&gt;1619K(5632K), 0.0007013 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \r\n[GC (Allocation Failure) [PSYoungGen: 1160K-&gt;500K(1536K)] 4200K-&gt;3876K(5632K), 0.0005479 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \r\n[GC (Allocation Failure) [PSYoungGen: 500K-&gt;484K(1536K)] 3876K-&gt;3860K(5632K), 0.0003762 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \r\n[Full GC (Allocation Failure) [PSYoungGen: 484K-&gt;0K(1536K)] [ParOldGen: 3375K-&gt;2714K(4096K)] 3860K-&gt;2714K(5632K), [Metaspace: 2683K-&gt;2683K(1056768K)], 0.0048137 secs] [Times: user=0.00 sys=0.00, real=0.01 secs] \r\n[GC (Allocation Failure) [PSYoungGen: 20K-&gt;32K(1536K)] 4014K-&gt;4026K(5632K), 0.0003080 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \r\n[Full GC (Ergonomics) [PSYoungGen: 32K-&gt;0K(1536K)] [ParOldGen: 3994K-&gt;3354K(4096K)] 4026K-&gt;3354K(5632K), [Metaspace: 2683K-&gt;2683K(1056768K)], 0.0016179 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \r\n[GC (Allocation Failure) [PSYoungGen: 0K-&gt;0K(1536K)] 3354K-&gt;3354K(5632K), 0.0002432 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] \r\n[Full GC (Allocation Failure) [PSYoungGen: 0K-&gt;0K(1536K)] [ParOldGen: 3354K-&gt;3342K(4096K)] 3354K-&gt;3342K(5632K), [Metaspace: 2683K-&gt;2683K(1056768K)], 0.0046264 secs] [Times: user=0.08 sys=0.00, real=0.00 secs] \r\nException in thread \"main\" java.lang.OutOfMemoryError: Java heap space\r\n\tat java.util.Arrays.copyOfRange(Arrays.java:3664)\r\n\tat java.lang.String.&lt;init&gt;(String.java:207)\r\n\tat java.lang.StringBuilder.toString(StringBuilder.java:413)\r\nHeap\r\n PSYoungGen      total 1536K, used 41K [0x00000000ffe00000, 0x0000000100000000, 0x0000000100000000)\r\n  eden space 1024K, 4% used [0x00000000ffe00000,0x00000000ffe0a470,0x00000000fff00000)\r\n  from space 512K, 0% used [0x00000000fff00000,0x00000000fff00000,0x00000000fff80000)\r\n  to   space 512K, 0% used [0x00000000fff80000,0x00000000fff80000,0x0000000100000000)\r\n ParOldGen       total 4096K, used 3342K [0x00000000ffa00000, 0x00000000ffe00000, 0x00000000ffe00000)\r\n  object space 4096K, 81% used [0x00000000ffa00000,0x00000000ffd43840,0x00000000ffe00000)\r\n Metaspace       used 2717K, capacity 4486K, committed 4864K, reserved 1056768K\r\n  class space    used 287K, capacity 386K, committed 512K, reserved 1048576K\r\n<\/code><\/pre>\n<p>\u5728\u4f7f\u7528\u5e74\u9f84\u4f34\u968f\u7740PSYoungGen\u3001ParOldGen\u548cMetaspace\u7684\u4e0d\u540c\u4ee3\u9645\u56de\u6536\u8fdb\u884c\u5783\u573e\u56de\u6536\u7684\u8fc7\u7a0b\u4e2d\u53d1\u751f\u4e86\u7ed3\u679c\u3002<br \/>\n\u5728\u53d1\u751fOutOfMemoryError\u4e4b\u524d\uff0c\u5148\u6267\u884c\u4e86Full GC\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5806\u533a\u662f\u4ec0\u4e48\u610f\u601d\uff1f \u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\uff0cJVM\u4f1a\u4e3a\u4e86\u751f\u6210\u7684\u5bf9\u8c61\u5206\u914d\u4e00\u5757\u88ab\u79f0\u4e3a\u5806\u533a\u7684\u5185\u5b58\u7a7a\u95f4\u3002 \u5783\u573e\u6536\u96c6\u5458\u662f \u5783\u573e\u6536\u96c6\u5668 [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31269","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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