{"id":6846,"date":"2025-08-27T11:18:27","date_gmt":"2025-08-27T03:18:27","guid":{"rendered":"https:\/\/t.n-years.com\/?p=6846"},"modified":"2025-08-27T11:18:27","modified_gmt":"2025-08-27T03:18:27","slug":"java-%e5%9e%83%e5%9c%be%e6%94%b6%e9%9b%86%e5%99%a8","status":"publish","type":"post","link":"https:\/\/t.n-years.com\/?p=6846","title":{"rendered":"Java \u5783\u573e\u6536\u96c6\u5668"},"content":{"rendered":"<p>Java \u4e2d\u7684 Serial GC\u3001Parallel GC\u3001CMS\u3001G1\u3001ZGC \u548c Shenandoah \u662f\u4e0d\u540c\u7684\u5783\u573e\u6536\u96c6\u5668\uff0c\u5404\u81ea\u57fa\u4e8e\u4e0d\u540c\u7684\u8bbe\u8ba1\u7406\u5ff5\uff0c\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u3002\u4ee5\u4e0b\u662f\u5b83\u4eec\u7684\u7279\u70b9\u53ca\u9002\u7528\u573a\u666f\u5206\u6790\uff1a<\/p>\n<h3>1. Serial GC\uff08\u4e32\u884c\u5783\u573e\u6536\u96c6\u5668\uff09<\/h3>\n<ul>\n<li><strong>\u7279\u70b9<\/strong>\uff1a\n<ul>\n<li>\u5355\u7ebf\u7a0b\u6267\u884c\u5783\u573e\u56de\u6536\uff0c\u56de\u6536\u65f6\u4f1a\u6682\u505c\u6240\u6709\u7528\u6237\u7ebf\u7a0b\uff08Stop-The-World\uff0cSTW\uff09\u3002<\/li>\n<li>\u5b9e\u73b0\u7b80\u5355\uff0c\u5185\u5b58\u5360\u7528\u5c11\uff0c\u6ca1\u6709\u7ebf\u7a0b\u4ea4\u4e92\u5f00\u9500\u3002<\/li>\n<li>\u91c7\u7528&quot;\u6807\u8bb0-\u590d\u5236&quot;\uff08\u65b0\u751f\u4ee3\uff09\u548c&quot;\u6807\u8bb0-\u6574\u7406&quot;\uff08\u8001\u5e74\u4ee3\uff09\u7b97\u6cd5\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u9002\u7528\u573a\u666f<\/strong>\uff1a\n<ul>\n<li>\u5355\u7ebf\u7a0b\u73af\u5883\u6216\u5ba2\u6237\u7aef\u5e94\u7528\uff08\u5982\u684c\u9762\u7a0b\u5e8f\uff09\u3002<\/li>\n<li>\u5185\u5b58\u8f83\u5c0f\u7684\u5d4c\u5165\u5f0f\u7cfb\u7edf\u3002<\/li>\n<li>\u4e0d\u9002\u5408\u670d\u52a1\u5668\u73af\u5883\u548c\u9ad8\u5e76\u53d1\u5e94\u7528\uff08STW \u65f6\u95f4\u8fc7\u957f\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u542f\u7528\u53c2\u6570<\/strong>\uff1a<code>-XX:+UseSerialGC<\/code><\/li>\n<\/ul>\n<h3>2. Parallel GC\uff08\u5e76\u884c\u5783\u573e\u6536\u96c6\u5668\uff09<\/h3>\n<ul>\n<li><strong>\u7279\u70b9<\/strong>\uff1a\n<ul>\n<li>\u591a\u7ebf\u7a0b\u6267\u884c\u5783\u573e\u56de\u6536\uff0c\u63d0\u9ad8\u541e\u5410\u91cf\uff08\u5355\u4f4d\u65f6\u95f4\u5185\u5904\u7406\u7684\u4efb\u52a1\u91cf\uff09\u3002<\/li>\n<li>\u4ecd\u6709 STW \u505c\u987f\uff0c\u4f46\u505c\u987f\u65f6\u95f4\u6bd4 Serial GC \u77ed\u3002<\/li>\n<li>\u65b0\u751f\u4ee3\u91c7\u7528&quot;\u6807\u8bb0-\u590d\u5236&quot;\uff0c\u8001\u5e74\u4ee3\u91c7\u7528&quot;\u6807\u8bb0-\u6574\u7406&quot;\u7b97\u6cd5\u3002<\/li>\n<li>\u5173\u6ce8\u541e\u5410\u91cf\u4f18\u5316\uff0c\u9ed8\u8ba4\u4f1a\u6839\u636e CPU \u6838\u5fc3\u6570\u81ea\u52a8\u8c03\u6574\u7ebf\u7a0b\u6570\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u9002\u7528\u573a\u666f<\/strong>\uff1a\n<ul>\n<li>\u6ce8\u91cd\u541e\u5410\u91cf\u7684\u670d\u52a1\u5668\u5e94\u7528\uff08\u5982\u540e\u53f0\u8ba1\u7b97\u3001\u6279\u5904\u7406\u4efb\u52a1\uff09\u3002<\/li>\n<li>\u591a\u6838 CPU \u73af\u5883\uff0c\u5141\u8bb8\u4e00\u5b9a STW \u505c\u987f\u3002<\/li>\n<li>\u4e0d\u9002\u5408\u5bf9\u54cd\u5e94\u65f6\u95f4\u654f\u611f\u7684\u5e94\u7528\uff08\u5982 Web \u670d\u52a1\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u542f\u7528\u53c2\u6570<\/strong>\uff1a<code>-XX:+UseParallelGC<\/code>\uff08\u9ed8\u8ba4\u65b0\u751f\u4ee3\u5e76\u884c\uff09\u3001<code>-XX:+UseParallelOldGC<\/code>\uff08\u8001\u5e74\u4ee3\u4e5f\u5e76\u884c\uff0cJDK 8 \u540e\u9ed8\u8ba4\u542f\u7528\uff09<\/li>\n<\/ul>\n<h3>3. CMS\uff08Concurrent Mark Sweep\uff0c\u5e76\u53d1\u6807\u8bb0\u6e05\u9664\uff09<\/h3>\n<ul>\n<li><strong>\u7279\u70b9<\/strong>\uff1a\n<ul>\n<li>\u4ee5\u4f4e\u5ef6\u8fdf\u4e3a\u76ee\u6807\uff0c\u5c3d\u91cf\u51cf\u5c11 STW \u65f6\u95f4\u3002<\/li>\n<li>\u8001\u5e74\u4ee3\u56de\u6536\u4e3b\u8981\u5206\u4e3a 4 \u4e2a\u9636\u6bb5\uff1a\u521d\u59cb\u6807\u8bb0\uff08STW\uff09\u2192 \u5e76\u53d1\u6807\u8bb0 \u2192 \u91cd\u65b0\u6807\u8bb0\uff08STW\uff09\u2192 \u5e76\u53d1\u6e05\u9664\u3002<\/li>\n<li>\u65b0\u751f\u4ee3\u4ecd\u4f7f\u7528 Parallel GC \u7684&quot;\u6807\u8bb0-\u590d\u5236&quot;\u7b97\u6cd5\u3002<\/li>\n<li>\u7f3a\u70b9\uff1a<\/li>\n<li>\u5e76\u53d1\u9636\u6bb5\u4f1a\u5360\u7528 CPU \u8d44\u6e90\uff0c\u964d\u4f4e\u541e\u5410\u91cf\u3002<\/li>\n<li>\u91c7\u7528&quot;\u6807\u8bb0-\u6e05\u9664&quot;\u7b97\u6cd5\uff0c\u4f1a\u4ea7\u751f\u5185\u5b58\u788e\u7247\u3002<\/li>\n<li>\u5bf9\u5927\u5806\u5185\u5b58\u652f\u6301\u4e0d\u4f73\uff0c\u53ef\u80fd\u56e0\u5185\u5b58\u788e\u7247\u5bfc\u81f4\u9891\u7e41 Full GC\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u9002\u7528\u573a\u666f<\/strong>\uff1a\n<ul>\n<li>\u5bf9\u54cd\u5e94\u65f6\u95f4\u654f\u611f\u7684\u5e94\u7528\uff08\u5982 Web \u670d\u52a1\u5668\u3001\u7535\u5546\u7cfb\u7edf\uff09\u3002<\/li>\n<li>\u5806\u5185\u5b58\u4e2d\u7b49\u5927\u5c0f\uff08\u901a\u5e38\u5c0f\u4e8e 16GB\uff09\uff0c\u4e14 CPU \u6838\u5fc3\u6570\u5145\u8db3\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6ce8\u610f<\/strong>\uff1aJDK 9 \u4e2d\u88ab\u6807\u8bb0\u4e3a deprecated\uff0cJDK 14 \u4e2d\u79fb\u9664\uff0c\u63a8\u8350\u7528 G1 \u66ff\u4ee3\u3002<\/li>\n<li><strong>\u542f\u7528\u53c2\u6570<\/strong>\uff1a<code>-XX:+UseConcMarkSweepGC<\/code><\/li>\n<\/ul>\n<h3>4. G1\uff08Garbage-First\uff09<\/h3>\n<ul>\n<li><strong>\u7279\u70b9<\/strong>\uff1a\n<ul>\n<li>\u9762\u5411\u5927\u5806\u5185\u5b58\uff08\u652f\u6301\u6570\u5341 GB \u751a\u81f3\u66f4\u5927\uff09\uff0c\u517c\u987e\u541e\u5410\u91cf\u548c\u5ef6\u8fdf\u3002<\/li>\n<li>\u5c06\u5806\u5185\u5b58\u5212\u5206\u4e3a\u591a\u4e2a\u5927\u5c0f\u76f8\u7b49\u7684 Region\uff08\u533a\u57df\uff09\uff0c\u4f18\u5148\u56de\u6536\u5783\u573e\u6700\u591a\u7684 Region\uff08&quot;Garbage-First&quot;\uff09\u3002<\/li>\n<li>\u91c7\u7528&quot;\u6807\u8bb0-\u590d\u5236&quot;\uff08Region \u95f4\u590d\u5236\uff09\u548c&quot;\u6807\u8bb0-\u6574\u7406&quot;\u7b97\u6cd5\uff0c\u51cf\u5c11\u5185\u5b58\u788e\u7247\u3002<\/li>\n<li>STW \u505c\u987f\u53ef\u9884\u6d4b\uff0c\u652f\u6301\u8bbe\u7f6e\u6700\u5927\u505c\u987f\u65f6\u95f4\u76ee\u6807\uff08<code>-XX:MaxGCPauseMillis<\/code>\uff09\u3002<\/li>\n<li>\u540c\u65f6\u7ba1\u7406\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\uff0c\u65e0\u9700\u914d\u5408\u5176\u4ed6\u6536\u96c6\u5668\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u9002\u7528\u573a\u666f<\/strong>\uff1a\n<ul>\n<li>\u5927\u5806\u5185\u5b58\u5e94\u7528\uff08\u5982\u5927\u578b\u5206\u5e03\u5f0f\u7cfb\u7edf\u3001\u4e2d\u95f4\u4ef6\uff09\u3002<\/li>\n<li>\u65e2\u8981\u6c42\u4e00\u5b9a\u541e\u5410\u91cf\uff0c\u53c8\u9700\u8981\u63a7\u5236\u5ef6\u8fdf\u7684\u573a\u666f\uff08\u5982\u4f01\u4e1a\u7ea7\u5e94\u7528\uff09\u3002<\/li>\n<li>\u66ff\u4ee3 CMS \u7684\u4e3b\u6d41\u9009\u62e9\uff08JDK 9 \u540e\u9ed8\u8ba4 GC\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u542f\u7528\u53c2\u6570<\/strong>\uff1a<code>-XX:+UseG1GC<\/code>\uff08JDK 9+ \u9ed8\u8ba4\uff09<\/li>\n<\/ul>\n<h3>5. ZGC\uff08Z Garbage Collector\uff09<\/h3>\n<ul>\n<li><strong>\u7279\u70b9<\/strong>\uff1a\n<ul>\n<li>\u8d85\u4f4e\u5ef6\u8fdf\u8bbe\u8ba1\uff0cSTW \u65f6\u95f4\u63a7\u5236\u5728\u6beb\u79d2\u7ea7\u4ee5\u5185\uff08\u901a\u5e38 &lt; 10ms\uff09\uff0c\u4e14\u51e0\u4e4e\u4e0d\u968f\u5806\u5927\u5c0f\u589e\u957f\u800c\u589e\u52a0\u3002<\/li>\n<li>\u652f\u6301\u8d85\u5927\u5806\u5185\u5b58\uff08TB \u7ea7\uff09\uff0c\u91c7\u7528\u57fa\u4e8e Region \u7684\u5185\u5b58\u5e03\u5c40\u3002<\/li>\n<li>\u5e76\u53d1\u6267\u884c\u5927\u90e8\u5206\u56de\u6536\u9636\u6bb5\uff08\u6807\u8bb0\u3001\u8f6c\u79fb\u3001\u91cd\u5b9a\u4f4d\uff09\uff0c\u4ec5\u521d\u59cb\u6807\u8bb0\u548c\u6700\u7ec8\u6807\u8bb0\u6709\u6781\u77ed STW\u3002<\/li>\n<li>\u91c7\u7528&quot;\u6807\u8bb0-\u590d\u5236&quot;\u7b97\u6cd5\uff0c\u901a\u8fc7\u7740\u8272\u6307\u9488\u548c\u8bfb\u5c4f\u969c\u5b9e\u73b0\u9ad8\u6548\u5e76\u53d1\u64cd\u4f5c\u3002<\/li>\n<li>\u7f3a\u70b9\uff1a\u541e\u5410\u91cf\u7565\u4f4e\u4e8e G1\uff0c\u5185\u5b58\u5f00\u9500\u8f83\u9ad8\uff08\u989d\u5916\u5360\u7528\u7ea6 15-30% \u5806\u7a7a\u95f4\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u9002\u7528\u573a\u666f<\/strong>\uff1a\n<ul>\n<li>\u8d85\u5927\u5806\u5185\u5b58\u5e94\u7528\uff08\u5982\u5927\u578b\u6570\u636e\u5e93\u3001\u5927\u6570\u636e\u5904\u7406\uff09\u3002<\/li>\n<li>\u5bf9\u5ef6\u8fdf\u6781\u7aef\u654f\u611f\u7684\u573a\u666f\uff08\u5982\u9ad8\u9891\u4ea4\u6613\u3001\u5b9e\u65f6\u54cd\u5e94\u7cfb\u7edf\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u542f\u7528\u53c2\u6570<\/strong>\uff1a<code>-XX:+UseZGC<\/code>\uff08JDK 11 \u5f15\u5165\uff0cJDK 15 \u6b63\u5f0f\u53ef\u7528\uff09<\/li>\n<\/ul>\n<h3>6. Shenandoah<\/h3>\n<ul>\n<li><strong>\u7279\u70b9<\/strong>\uff1a\n<ul>\n<li>\u76ee\u6807\u662f\u4f4e\u5ef6\u8fdf\uff0cSTW \u65f6\u95f4\u4e0e\u5806\u5927\u5c0f\u65e0\u5173\uff08\u652f\u6301 GB \u5230 TB \u7ea7\u5806\uff09\u3002<\/li>\n<li>\u91c7\u7528&quot;\u6807\u8bb0-\u6574\u7406&quot;\u7b97\u6cd5\uff0c\u901a\u8fc7\u8f6c\u53d1\u6307\u9488\u548c\u8bfb\u5c4f\u969c\u5b9e\u73b0\u5e76\u53d1\u538b\u7f29\uff08\u65e0\u5185\u5b58\u788e\u7247\uff09\u3002<\/li>\n<li>\u6240\u6709\u9636\u6bb5\uff08\u9664\u521d\u59cb\u6807\u8bb0\u548c\u6700\u7ec8\u6807\u8bb0\uff09\u5747\u5e76\u53d1\u6267\u884c\uff0cSTW \u65f6\u95f4\u6781\u77ed\uff08\u901a\u5e38 &lt; 10ms\uff09\u3002<\/li>\n<li>\u4e0e ZGC \u76f8\u6bd4\uff0c\u5185\u5b58\u5f00\u9500\u8f83\u4f4e\uff0c\u4f46\u5b9e\u73b0\u66f4\u590d\u6742\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u9002\u7528\u573a\u666f<\/strong>\uff1a\n<ul>\n<li>\u5927\u5806\u5185\u5b58\u4e14\u5bf9\u5ef6\u8fdf\u654f\u611f\u7684\u5e94\u7528\uff08\u5982\u5206\u5e03\u5f0f\u670d\u52a1\u3001\u5b9e\u65f6\u6570\u636e\u5206\u6790\uff09\u3002<\/li>\n<li>\u9700\u8981\u5e73\u8861\u5ef6\u8fdf\u548c\u5185\u5b58\u5f00\u9500\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6ce8\u610f<\/strong>\uff1aOracle JDK \u4e0d\u5305\u542b Shenandoah\uff0c\u4e3b\u8981\u5728 OpenJDK\u3001RedHat \u7b49\u53d1\u884c\u7248\u4e2d\u63d0\u4f9b\u3002<\/li>\n<li><strong>\u542f\u7528\u53c2\u6570<\/strong>\uff1a<code>-XX:+UseShenandoahGC<\/code>\uff08JDK 12 \u5f15\u5165\uff09<\/li>\n<\/ul>\n<h3>\u603b\u7ed3\u5bf9\u6bd4<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u6536\u96c6\u5668<\/th>\n<th>\u5ef6\u8fdf\u7279\u6027<\/th>\n<th>\u541e\u5410\u91cf<\/th>\n<th>\u5806\u5927\u5c0f\u652f\u6301<\/th>\n<th>\u9002\u7528\u573a\u666f<\/th>\n<th>\u5178\u578b\u5e94\u7528\u793a\u4f8b<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Serial GC<\/td>\n<td>\u9ad8\u5ef6\u8fdf\uff08STW\u957f\uff09<\/td>\n<td>\u4f4e<\/td>\n<td>\u5c0f\uff08&lt;1GB\uff09<\/td>\n<td>\u5ba2\u6237\u7aef\/\u5d4c\u5165\u5f0f<\/td>\n<td>\u684c\u9762\u5e94\u7528\u3001\u5c0f\u7a0b\u5e8f<\/td>\n<\/tr>\n<tr>\n<td>Parallel GC<\/td>\n<td>\u4e2d\u5ef6\u8fdf<\/td>\n<td>\u9ad8<\/td>\n<td>\u4e2d\uff08&lt;10GB\uff09<\/td>\n<td>\u541e\u5410\u91cf\u4f18\u5148\u7684\u6279\u5904\u7406\u4efb\u52a1<\/td>\n<td>\u6570\u636e\u5206\u6790\u3001\u540e\u53f0\u8ba1\u7b97<\/td>\n<\/tr>\n<tr>\n<td>CMS<\/td>\n<td>\u4f4e\u5ef6\u8fdf\uff08\u90e8\u5206\u9636\u6bb5\u5e76\u53d1\uff09<\/td>\n<td>\u4e2d<\/td>\n<td>\u4e2d\uff08&lt;16GB\uff09<\/td>\n<td>\u54cd\u5e94\u65f6\u95f4\u654f\u611f\u7684\u4e2d\u5c0f\u5806\u5e94\u7528<\/td>\n<td>\u4f20\u7edf Web \u670d\u52a1<\/td>\n<\/tr>\n<tr>\n<td>G1<\/td>\n<td>\u53ef\u9884\u6d4b\u5ef6\u8fdf<\/td>\n<td>\u4e2d\u9ad8<\/td>\n<td>\u5927\uff08&lt;100GB\uff09<\/td>\n<td>\u5e73\u8861\u5ef6\u8fdf\u4e0e\u541e\u5410\u91cf\u7684\u5927\u5806\u5e94\u7528<\/td>\n<td>\u4f01\u4e1a\u7ea7\u5e94\u7528\u3001\u4e2d\u95f4\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>ZGC<\/td>\n<td>\u8d85\u4f4e\u5ef6\u8fdf<\/td>\n<td>\u4e2d<\/td>\n<td>\u8d85\u5927\uff08TB\u7ea7\uff09<\/td>\n<td>\u8d85\u5927\u5806+\u6781\u7aef\u4f4e\u5ef6\u8fdf\u9700\u6c42<\/td>\n<td>\u9ad8\u9891\u4ea4\u6613\u3001\u5927\u578b\u6570\u636e\u5e93<\/td>\n<\/tr>\n<tr>\n<td>Shenandoah<\/td>\n<td>\u8d85\u4f4e\u5ef6\u8fdf<\/td>\n<td>\u4e2d<\/td>\n<td>\u8d85\u5927\uff08TB\u7ea7\uff09<\/td>\n<td>\u8d85\u5927\u5806+\u5e73\u8861\u5185\u5b58\u5f00\u9500<\/td>\n<td>\u5206\u5e03\u5f0f\u670d\u52a1\u3001\u5b9e\u65f6\u6570\u636e\u5904\u7406<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u9009\u62e9\u65f6\u9700\u6839\u636e\u5e94\u7528\u7684\u5ef6\u8fdf\u9700\u6c42\u3001\u5806\u5927\u5c0f\u3001CPU \u8d44\u6e90\u7b49\u56e0\u7d20\u7efc\u5408\u8003\u91cf\uff0c\u4f18\u5148\u63a8\u8350 G1\uff08\u901a\u7528\u573a\u666f\uff09\u3001ZGC\/Shenandoah\uff08\u8d85\u5927\u5806+\u4f4e\u5ef6\u8fdf\uff09\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u4e2d\u7684 Serial GC\u3001Parallel GC\u3001CMS\u3001G1\u3001ZGC \u548c Shenandoah \u662f&#8230; 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