{"id":43652,"date":"2025-06-13T16:45:53","date_gmt":"2025-06-13T08:45:53","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/43652.html"},"modified":"2025-06-13T16:45:53","modified_gmt":"2025-06-13T08:45:53","slug":"linux-%e6%9c%8d%e5%8a%a1%e5%99%a8-java-%e6%97%a5%e5%bf%97%e6%80%a7%e8%83%bd%e6%95%85%e9%9a%9c%e5%ae%9a%e4%bd%8d%e5%ae%9e%e6%88%98%ef%bc%9a%e4%bb%8e%e7%b3%bb%e7%bb%9f%e7%9b%91%e6%8e%a7%e5%88%b0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/43652.html","title":{"rendered":"Linux \u670d\u52a1\u5668 Java \u65e5\u5fd7\u6027\u80fd\u6545\u969c\u5b9a\u4f4d\u5b9e\u6218\uff1a\u4ece\u7cfb\u7edf\u76d1\u63a7\u5230\u4ee3\u7801\u4f18\u5316\u7684\u5168\u6d41\u7a0b\u89e3\u6790"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\n<ul>\n<li>\u4e00\u3001\u6545\u969c\u73b0\u8c61<\/li>\n<li>\u4e8c\u3001\u521d\u6b65\u6392\u67e5<\/li>\n<li>\n<ul>\n<li>2.1 \u7cfb\u7edf\u8d44\u6e90\u76d1\u63a7<\/li>\n<li>2.2 \u65e5\u5fd7\u6587\u4ef6\u5206\u6790<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001Java\u8fdb\u7a0b\u6df1\u5165\u5206\u6790<\/li>\n<li>\n<ul>\n<li>3.1 \u7ebf\u7a0bdump\u5206\u6790<\/li>\n<li>3.2 CPU\u70ed\u70b9\u5206\u6790<\/li>\n<\/ul>\n<\/li>\n<li>\u56db\u3001\u65e5\u5fd7\u914d\u7f6e\u68c0\u67e5<\/li>\n<li>\n<ul>\n<li>4.1 \u67e5\u770b\u65e5\u5fd7\u914d\u7f6e\u6587\u4ef6<\/li>\n<li>4.2 \u53d1\u73b0\u95ee\u9898<\/li>\n<\/ul>\n<\/li>\n<li>\u4e94\u3001\u4ee3\u7801\u5ba1\u67e5<\/li>\n<li>\n<ul>\n<li>5.1 \u5b9a\u4f4d\u9ad8\u9891\u7387\u65e5\u5fd7\u4ee3\u7801<\/li>\n<li>5.2 \u65e5\u5fd7\u6027\u80fd\u6d4b\u8bd5<\/li>\n<\/ul>\n<\/li>\n<li>\u516d\u3001\u4f18\u5316\u65b9\u6848<\/li>\n<li>\n<ul>\n<li>6.1 \u8c03\u6574\u65e5\u5fd7\u7ea7\u522b<\/li>\n<li>6.2 \u4f18\u5316\u65e5\u5fd7\u683c\u5f0f<\/li>\n<li>6.3 \u542f\u7528\u5f02\u6b65\u65e5\u5fd7<\/li>\n<li>6.4 \u4ee3\u7801\u4f18\u5316<\/li>\n<\/ul>\n<\/li>\n<li>\u4e03\u3001\u4f18\u5316\u6548\u679c\u9a8c\u8bc1<\/li>\n<li>\n<ul>\n<li>7.1 \u7cfb\u7edf\u8d44\u6e90\u76d1\u63a7<\/li>\n<li>7.2 \u5e94\u7528\u6027\u80fd\u6d4b\u8bd5<\/li>\n<li>7.3 \u65e5\u5fd7\u6587\u4ef6\u5927\u5c0f<\/li>\n<\/ul>\n<\/li>\n<li>\u516b\u3001\u9884\u9632\u63aa\u65bd<\/li>\n<li>\n<ul>\n<li>8.1 \u65e5\u5fd7\u89c4\u8303\u5236\u5b9a<\/li>\n<li>8.2 \u5b9a\u671f\u65e5\u5fd7\u5ba1\u8ba1<\/li>\n<li>8.3 \u65e5\u5fd7\u6027\u80fd\u76d1\u63a7<\/li>\n<\/ul>\n<\/li>\n<li>\u603b\u7ed3<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u4e00\u3001\u6545\u969c\u73b0\u8c61<\/h3>\n<p>\u67d0\u7535\u5546\u5e73\u53f0\u7684\u8ba2\u5355\u670d\u52a1\u7a81\u7136\u51fa\u73b0\u54cd\u5e94\u7f13\u6162&#xff0c;\u541e\u5410\u91cf\u4e0b\u964d\u7684\u60c5\u51b5\u3002\u76d1\u63a7\u7cfb\u7edf\u663e\u793a&#xff1a;<\/p>\n<li>\u670d\u52a1\u5668CPU\u4f7f\u7528\u7387\u6301\u7eed\u8d85\u8fc780%<\/li>\n<li>\u78c1\u76d8I\/O\u7e41\u5fd9&#xff0c;\u5199\u64cd\u4f5c\u9891\u7e41<\/li>\n<li>Java\u5e94\u7528\u54cd\u5e94\u65f6\u95f4\u4ece\u5e73\u574720ms\u4e0a\u5347\u5230500ms<\/li>\n<li>\u65e5\u5fd7\u6587\u4ef6\u589e\u957f\u5f02\u5e38\u8fc5\u901f&#xff0c;\u6bcf\u5c0f\u65f6\u4ea7\u751f\u7ea65GB\u65e5\u5fd7<\/li>\n<h3>\u4e8c\u3001\u521d\u6b65\u6392\u67e5<\/h3>\n<h4>2.1 \u7cfb\u7edf\u8d44\u6e90\u76d1\u63a7<\/h4>\n<p>\u4f7f\u7528top\u547d\u4ee4\u67e5\u770b\u7cfb\u7edf\u8d44\u6e90\u4f7f\u7528\u60c5\u51b5&#xff1a;<\/p>\n<p><span class=\"token function\">top<\/span> <span class=\"token parameter variable\">-c<\/span><\/p>\n<p>\u53d1\u73b0Java\u8fdb\u7a0b&#xff08;PID&#061;12345&#xff09;\u5360\u7528CPU\u9ad8\u8fbe150%&#xff08;\u591a\u6838\u7cfb\u7edf&#xff09;&#xff0c;\u4e14RES\u5185\u5b58\u4f7f\u7528\u6301\u7eed\u589e\u957f\u3002<\/p>\n<p>\u4f7f\u7528iostat\u67e5\u770b\u78c1\u76d8I\/O&#xff1a;<\/p>\n<p>iostat <span class=\"token parameter variable\">-x<\/span> <span class=\"token number\">1<\/span><\/p>\n<p>\u7ed3\u679c\u663e\u793a\u78c1\u76d8%util\u63a5\u8fd1100%&#xff0c;wr\/s&#xff08;\u5199\u64cd\u4f5c\u6bcf\u79d2&#xff09;\u8fbe\u5230500MB\u4ee5\u4e0a\u3002<\/p>\n<h4>2.2 \u65e5\u5fd7\u6587\u4ef6\u5206\u6790<\/h4>\n<p>\u68c0\u67e5Java\u5e94\u7528\u65e5\u5fd7\u76ee\u5f55&#xff0c;\u53d1\u73b0order-service.log\u6587\u4ef6\u6bcf\u5c0f\u65f6\u589e\u957f\u7ea65GB&#xff0c;\u4e14\u65e5\u5fd7\u6eda\u52a8\u9891\u7e41\u3002<\/p>\n<h3>\u4e09\u3001Java\u8fdb\u7a0b\u6df1\u5165\u5206\u6790<\/h3>\n<h4>3.1 \u7ebf\u7a0bdump\u5206\u6790<\/h4>\n<p>\u751f\u6210Java\u8fdb\u7a0b\u7684\u7ebf\u7a0bdump&#xff1a;<\/p>\n<p>jstack <span class=\"token number\">12345<\/span> <span class=\"token operator\">&gt;<\/span> thread_dump.txt<\/p>\n<p>\u5206\u6790\u7ebf\u7a0bdump\u6587\u4ef6&#xff0c;\u53d1\u73b0\u5927\u91cf\u7ebf\u7a0b\u5904\u4e8eRUNNABLE\u72b6\u6001&#xff0c;\u4e14\u96c6\u4e2d\u5728\u65e5\u5fd7\u76f8\u5173\u7c7b&#xff1a;<\/p>\n<p>&#034;http-nio-8080-exec-10&#034; #25 daemon prio&#061;5 os_prio&#061;0 tid&#061;0x00007f9c000c5800 nid&#061;0x303b runnable [0x00007f9bfd1fd000]<br \/>\n   java.lang.Thread.State: RUNNABLE<br \/>\n        at java.io.FileOutputStream.writeBytes(Native Method)<br \/>\n        at java.io.FileOutputStream.write(FileOutputStream.java:326)<br \/>\n        at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)<br \/>\n        at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)<br \/>\n        at org.apache.logging.log4j.core.appender.OutputStreamManager.flush(OutputStreamManager.java:156)<br \/>\n        at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:177)<br \/>\n        &#8230;<\/p>\n<h4>3.2 CPU\u70ed\u70b9\u5206\u6790<\/h4>\n<p>\u4f7f\u7528async-profiler\u5206\u6790CPU\u70ed\u70b9&#xff1a;<\/p>\n<p><span class=\"token comment\"># \u5b89\u88c5async-profiler<\/span><br \/>\n<span class=\"token function\">wget<\/span> https:\/\/github.com\/jvm-profiling-tools\/async-profiler\/releases\/download\/v2.8.3\/async-profiler-2.8.3-linux-x64.tar.gz<br \/>\n<span class=\"token function\">tar<\/span> <span class=\"token parameter variable\">-zxvf<\/span> async-profiler-2.8.3-linux-x64.tar.gz<\/p>\n<p><span class=\"token comment\"># \u91c7\u96c6CPU\u70ed\u70b9\u6570\u636e&#xff08;\u6301\u7eed30\u79d2&#xff09;<\/span><br \/>\n.\/profiler.sh <span class=\"token parameter variable\">-d<\/span> <span class=\"token number\">30<\/span> <span class=\"token parameter variable\">-f<\/span> cpu_profile.html <span class=\"token number\">12345<\/span><\/p>\n<p>\u6253\u5f00\u751f\u6210\u7684cpu_profile.html&#xff0c;\u53d1\u73b0\u65e5\u5fd7\u76f8\u5173\u65b9\u6cd5\u5360\u7528\u4e86\u7ea640%\u7684CPU\u65f6\u95f4&#xff1a;<\/p>\n<h3>\u56db\u3001\u65e5\u5fd7\u914d\u7f6e\u68c0\u67e5<\/h3>\n<h4>4.1 \u67e5\u770b\u65e5\u5fd7\u914d\u7f6e\u6587\u4ef6<\/h4>\n<p>\u68c0\u67e5\u5e94\u7528\u7684log4j2.xml\u914d\u7f6e\u6587\u4ef6&#xff1a;<\/p>\n<p><span class=\"token prolog\">&lt;?xml version&#061;&#034;1.0&#034; encoding&#061;&#034;UTF-8&#034;?&gt;<\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Configuration<\/span> <span class=\"token attr-name\">status<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>WARN<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Appenders<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Console<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>Console<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">target<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>SYSTEM_OUT<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n            <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>PatternLayout<\/span> <span class=\"token attr-name\">pattern<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p %c{1}:%L &#8211; %m%n<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Console<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p>        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>RollingFile<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>File<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">fileName<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>order-service.log<span class=\"token punctuation\">&#034;<\/span><\/span><br \/>\n                     <span class=\"token attr-name\">filePattern<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>order-service.%d{yyyy-MM-dd}.log.gz<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n            <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>PatternLayout<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n                <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>pattern<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p %c{1}:%L &#8211; %m%n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>pattern<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n            <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>PatternLayout<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n            <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Policies<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n                <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>TimeBasedTriggeringPolicy<\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n                <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>SizeBasedTriggeringPolicy<\/span> <span class=\"token attr-name\">size<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>100 MB<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n            <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Policies<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>RollingFile<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Appenders<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p>    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Loggers<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Root<\/span> <span class=\"token attr-name\">level<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>info<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n            <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>AppenderRef<\/span> <span class=\"token attr-name\">ref<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>Console<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n            <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>AppenderRef<\/span> <span class=\"token attr-name\">ref<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>File<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Root<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p>        <span class=\"token comment\">&lt;!&#8211; \u4e1a\u52a1\u65e5\u5fd7\u914d\u7f6e &#8211;&gt;<\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Logger<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>com.example.order<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">level<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>debug<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">additivity<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>false<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n            <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>AppenderRef<\/span> <span class=\"token attr-name\">ref<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>Console<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n            <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>AppenderRef<\/span> <span class=\"token attr-name\">ref<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>File<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Logger<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Loggers<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Configuration<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<h4>4.2 \u53d1\u73b0\u95ee\u9898<\/h4>\n<li>\u6839\u65e5\u5fd7\u7ea7\u522b\u4e3ainfo&#xff0c;\u4f46\u4e1a\u52a1\u5305com.example.order\u65e5\u5fd7\u7ea7\u522b\u4e3adebug<\/li>\n<li>\u65e5\u5fd7\u683c\u5f0f\u5305\u542b%L&#xff08;\u884c\u53f7&#xff09;\u548c%c{1}&#xff08;\u7c7b\u540d&#xff09;&#xff0c;\u8fd9\u4e9b\u4f1a\u589e\u52a0\u65e5\u5fd7\u5904\u7406\u5f00\u9500<\/li>\n<li>\u6ca1\u6709\u914d\u7f6e\u65e5\u5fd7\u5f02\u6b65\u8f93\u51fa<\/li>\n<h3>\u4e94\u3001\u4ee3\u7801\u5ba1\u67e5<\/h3>\n<h4>5.1 \u5b9a\u4f4d\u9ad8\u9891\u7387\u65e5\u5fd7\u4ee3\u7801<\/h4>\n<p>\u4f7f\u7528grep\u67e5\u627e\u9ad8\u9891\u65e5\u5fd7\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token function\">grep<\/span> <span class=\"token parameter variable\">-r<\/span> <span class=\"token string\">&#034;logger.debug&#034;<\/span> src\/main\/java\/com\/example\/order\/<\/p>\n<p>\u53d1\u73b0\u4ee5\u4e0b\u5178\u578b\u95ee\u9898\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u8ba2\u5355\u5904\u7406\u670d\u52a1<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OrderService<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Logger<\/span> logger <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">LogManager<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getLogger<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">OrderService<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Order<\/span> <span class=\"token function\">processOrder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Order<\/span> order<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u95ee\u98981&#xff1a;\u5faa\u73af\u5185\u6253\u5370debug\u65e5\u5fd7<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">OrderItem<\/span> item <span class=\"token operator\">:<\/span> order<span class=\"token punctuation\">.<\/span><span class=\"token function\">getItems<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">debug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5904\u7406\u8ba2\u5355\u9879: {}&#034;<\/span><span class=\"token punctuation\">,<\/span> item<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u6bcf\u6b21\u5faa\u73af\u90fd\u6253\u5370<\/span><\/p>\n<p>            <span class=\"token comment\">\/\/ \u4e1a\u52a1\u903b\u8f91<\/span><br \/>\n            <span class=\"token function\">processItem<\/span><span class=\"token punctuation\">(<\/span>item<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u95ee\u98982&#xff1a;\u590d\u6742\u5bf9\u8c61\u76f4\u63a5\u6253\u5370<\/span><br \/>\n        logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">debug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8ba2\u5355\u5904\u7406\u5b8c\u6210: {}&#034;<\/span><span class=\"token punctuation\">,<\/span> order<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u5305\u542b\u5927\u91cf\u5b57\u6bb5\u7684\u590d\u6742\u5bf9\u8c61<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u95ee\u98983&#xff1a;\u672a\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b\u76f4\u63a5\u6784\u5efa\u53c2\u6570<\/span><br \/>\n        logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">debug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8ba1\u7b97\u8ba2\u5355\u603b\u91d1\u989d: {}&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">calculateTotal<\/span><span class=\"token punctuation\">(<\/span>order<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u65e0\u8bba\u65e5\u5fd7\u662f\u5426\u542f\u7528\u90fd\u4f1a\u6267\u884c\u8ba1\u7b97<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> order<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">BigDecimal<\/span> <span class=\"token function\">calculateTotal<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Order<\/span> order<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u590d\u6742\u8ba1\u7b97\u903b\u8f91<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> order<span class=\"token punctuation\">.<\/span><span class=\"token function\">getItems<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">stream<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">map<\/span><span class=\"token punctuation\">(<\/span>item <span class=\"token operator\">-&gt;<\/span> item<span class=\"token punctuation\">.<\/span><span class=\"token function\">getPrice<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">multiply<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">BigDecimal<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">valueOf<\/span><span class=\"token punctuation\">(<\/span>item<span class=\"token punctuation\">.<\/span><span class=\"token function\">getQuantity<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">.<\/span><span class=\"token function\">reduce<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">BigDecimal<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">ZERO<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">BigDecimal<\/span><span class=\"token operator\">::<\/span><span class=\"token function\">add<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>5.2 \u65e5\u5fd7\u6027\u80fd\u6d4b\u8bd5<\/h4>\n<p>\u7f16\u5199\u7b80\u5355\u7684\u6027\u80fd\u6d4b\u8bd5\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>apache<span class=\"token punctuation\">.<\/span>logging<span class=\"token punctuation\">.<\/span>log4j<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">LogManager<\/span><\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token import\"><span class=\"token namespace\">org<span class=\"token punctuation\">.<\/span>apache<span class=\"token punctuation\">.<\/span>logging<span class=\"token punctuation\">.<\/span>log4j<span class=\"token punctuation\">.<\/span><\/span><span class=\"token class-name\">Logger<\/span><\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">LoggingPerformanceTest<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Logger<\/span> logger <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">LogManager<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getLogger<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">LoggingPerformanceTest<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> count <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">100000<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u6d4b\u8bd5\u672a\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b<\/span><br \/>\n        <span class=\"token keyword\">long<\/span> start1 <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">currentTimeMillis<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> count<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">debug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u672a\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b: {}&#034;<\/span><span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">long<\/span> end1 <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">currentTimeMillis<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u6d4b\u8bd5\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b<\/span><br \/>\n        <span class=\"token keyword\">long<\/span> start2 <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">currentTimeMillis<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> count<span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">isDebugEnabled<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n                logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">debug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b: {}&#034;<\/span><span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">long<\/span> end2 <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">currentTimeMillis<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u672a\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b\u8017\u65f6: &#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>end1 <span class=\"token operator\">&#8211;<\/span> start1<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;ms&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b\u8017\u65f6: &#034;<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token punctuation\">(<\/span>end2 <span class=\"token operator\">&#8211;<\/span> start2<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token string\">&#034;ms&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u6d4b\u8bd5\u7ed3\u679c&#xff08;DEBUG\u7ea7\u522b\u5f00\u542f\u65f6&#xff09;&#xff1a;<\/p>\n<p>\u672a\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b\u8017\u65f6: 123ms<br \/>\n\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b\u8017\u65f6: 118ms<\/p>\n<p>\u6d4b\u8bd5\u7ed3\u679c&#xff08;DEBUG\u7ea7\u522b\u5173\u95ed\u65f6&#xff09;&#xff1a;<\/p>\n<p>\u672a\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b\u8017\u65f6: 98ms<br \/>\n\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b\u8017\u65f6: 2ms<\/p>\n<h3>\u516d\u3001\u4f18\u5316\u65b9\u6848<\/h3>\n<h4>6.1 \u8c03\u6574\u65e5\u5fd7\u7ea7\u522b<\/h4>\n<p>\u5c06\u4e1a\u52a1\u5305\u65e5\u5fd7\u7ea7\u522b\u4ecedebug\u8c03\u6574\u4e3ainfo&#xff1a;<\/p>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Logger<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>com.example.order<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">level<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>info<span class=\"token punctuation\">&#034;<\/span><\/span> <span class=\"token attr-name\">additivity<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>false<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>AppenderRef<\/span> <span class=\"token attr-name\">ref<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>Console<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>AppenderRef<\/span> <span class=\"token attr-name\">ref<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>File<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Logger<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<h4>6.2 \u4f18\u5316\u65e5\u5fd7\u683c\u5f0f<\/h4>\n<p>\u79fb\u9664\u884c\u53f7\u548c\u7c7b\u540d&#xff0c;\u51cf\u5c11\u65e5\u5fd7\u5904\u7406\u5f00\u9500&#xff1a;<\/p>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>PatternLayout<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>pattern<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>%d{yyyy-MM-dd HH:mm:ss} [%t] %-5p &#8211; %m%n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>pattern<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>PatternLayout<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<h4>6.3 \u542f\u7528\u5f02\u6b65\u65e5\u5fd7<\/h4>\n<p>\u914d\u7f6e\u5f02\u6b65\u65e5\u5fd7Appender&#xff1a;<\/p>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Appenders<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token comment\">&lt;!&#8211; \u5176\u4ed6Appender\u4fdd\u6301\u4e0d\u53d8 &#8211;&gt;<\/span><\/p>\n<p>    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Async<\/span> <span class=\"token attr-name\">name<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>AsyncFile<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>AppenderRef<\/span> <span class=\"token attr-name\">ref<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>File<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Async<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Appenders<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Loggers<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>Root<\/span> <span class=\"token attr-name\">level<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>info<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>AppenderRef<\/span> <span class=\"token attr-name\">ref<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>Console<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>AppenderRef<\/span> <span class=\"token attr-name\">ref<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>AsyncFile<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">\/&gt;<\/span><\/span> <span class=\"token comment\">&lt;!&#8211; \u4f7f\u7528\u5f02\u6b65Appender &#8211;&gt;<\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Root<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>Loggers<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<h4>6.4 \u4ee3\u7801\u4f18\u5316<\/h4>\n<p>\u4fee\u6539\u95ee\u9898\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">OrderService<\/span> <span class=\"token punctuation\">{<\/span><\/p>\n<p>    <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">final<\/span> <span class=\"token class-name\">Logger<\/span> logger <span class=\"token operator\">&#061;<\/span> <span class=\"token class-name\">LogManager<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getLogger<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">OrderService<\/span><span class=\"token punctuation\">.<\/span><span class=\"token keyword\">class<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Order<\/span> <span class=\"token function\">processOrder<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Order<\/span> order<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u53ea\u5728\u5fc5\u8981\u65f6\u6253\u5370\u6982\u8981\u4fe1\u606f<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">isDebugEnabled<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">debug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u5f00\u59cb\u5904\u7406\u8ba2\u5355&#xff0c;\u5305\u542b{}\u4e2a\u8ba2\u5355\u9879&#034;<\/span><span class=\"token punctuation\">,<\/span> order<span class=\"token punctuation\">.<\/span><span class=\"token function\">getItems<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">OrderItem<\/span> item <span class=\"token operator\">:<\/span> order<span class=\"token punctuation\">.<\/span><span class=\"token function\">getItems<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">processItem<\/span><span class=\"token punctuation\">(<\/span>item<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u907f\u514d\u6253\u5370\u5b8c\u6574\u5bf9\u8c61<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">isDebugEnabled<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">debug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8ba2\u5355\u5904\u7406\u5b8c\u6210&#xff0c;\u8ba2\u5355ID: {}&#034;<\/span><span class=\"token punctuation\">,<\/span> order<span class=\"token punctuation\">.<\/span><span class=\"token function\">getId<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ \u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b\u540e\u518d\u6267\u884c\u590d\u6742\u8ba1\u7b97<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">isDebugEnabled<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            logger<span class=\"token punctuation\">.<\/span><span class=\"token function\">debug<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8ba2\u5355\u603b\u91d1\u989d: {}&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">calculateTotal<\/span><span class=\"token punctuation\">(<\/span>order<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">return<\/span> order<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>\u4e03\u3001\u4f18\u5316\u6548\u679c\u9a8c\u8bc1<\/h3>\n<h4>7.1 \u7cfb\u7edf\u8d44\u6e90\u76d1\u63a7<\/h4>\n<p>\u4f18\u5316\u540e\u518d\u6b21\u4f7f\u7528top\u548ciostat\u76d1\u63a7\u7cfb\u7edf\u8d44\u6e90&#xff1a;<\/p>\n<ul>\n<li>Java\u8fdb\u7a0bCPU\u4f7f\u7528\u7387\u4ece150%\u964d\u81f330%<\/li>\n<li>\u78c1\u76d8wr\/s\u4ece500MB\/s\u964d\u81f350MB\/s<\/li>\n<li>\u7cfb\u7edf\u8d1f\u8f7d\u5e73\u5747\u4ece8.0\u964d\u81f31.2<\/li>\n<\/ul>\n<h4>7.2 \u5e94\u7528\u6027\u80fd\u6d4b\u8bd5<\/h4>\n<p>\u4f7f\u7528JMeter\u8fdb\u884c\u538b\u6d4b&#xff0c;\u7ed3\u679c\u5982\u4e0b&#xff1a;<\/p>\n<table>\n<tr>\u6307\u6807\u4f18\u5316\u524d\u4f18\u5316\u540e\u63d0\u5347\u6bd4\u4f8b<\/tr>\n<tbody>\n<tr>\n<td>\u5e73\u5747\u54cd\u5e94\u65f6\u95f4<\/td>\n<td>500ms<\/td>\n<td>45ms<\/td>\n<td>91%<\/td>\n<\/tr>\n<tr>\n<td>\u6700\u5927\u54cd\u5e94\u65f6\u95f4<\/td>\n<td>1800ms<\/td>\n<td>120ms<\/td>\n<td>93%<\/td>\n<\/tr>\n<tr>\n<td>\u541e\u5410\u91cf(QPS)<\/td>\n<td>200<\/td>\n<td>1800<\/td>\n<td>800%<\/td>\n<\/tr>\n<tr>\n<td>\u9519\u8bef\u7387<\/td>\n<td>5.2%<\/td>\n<td>0.1%<\/td>\n<td>98%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>7.3 \u65e5\u5fd7\u6587\u4ef6\u5927\u5c0f<\/h4>\n<p>\u4f18\u5316\u540e\u65e5\u5fd7\u6587\u4ef6\u6bcf\u5c0f\u65f6\u751f\u6210\u91cf\u4ece5GB\u964d\u81f3\u7ea6200MB&#xff0c;\u51cf\u5c11\u4e8696%\u3002<\/p>\n<h3>\u516b\u3001\u9884\u9632\u63aa\u65bd<\/h3>\n<h4>8.1 \u65e5\u5fd7\u89c4\u8303\u5236\u5b9a<\/h4>\n<li>\u751f\u4ea7\u73af\u5883\u9ed8\u8ba4\u65e5\u5fd7\u7ea7\u522b\u4e3ainfo<\/li>\n<li>\u907f\u514d\u5728\u5faa\u73af\u4e2d\u6253\u5370\u65e5\u5fd7<\/li>\n<li>\u4f7f\u7528isDebugEnabled()\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b<\/li>\n<li>\u907f\u514d\u6253\u5370\u5b8c\u6574\u5bf9\u8c61&#xff0c;\u53ea\u6253\u5370\u5173\u952e\u4fe1\u606f<\/li>\n<li>\u751f\u4ea7\u73af\u5883\u907f\u514d\u4f7f\u7528%L\u548c%c\u7b49\u5f00\u9500\u5927\u7684\u6a21\u5f0f<\/li>\n<h4>8.2 \u5b9a\u671f\u65e5\u5fd7\u5ba1\u8ba1<\/h4>\n<p>\u7f16\u5199\u811a\u672c\u5b9a\u671f\u68c0\u67e5\u65e5\u5fd7\u914d\u7f6e\u548c\u4ee3\u7801\u4e2d\u7684\u65e5\u5fd7\u4f7f\u7528\u60c5\u51b5&#xff1a;<\/p>\n<p><span class=\"token shebang important\">#!\/bin\/bash<\/span><\/p>\n<p><span class=\"token comment\"># \u68c0\u67e5\u9879\u76ee\u4e2d\u6240\u6709debug\u65e5\u5fd7<\/span><br \/>\n<span class=\"token function\">grep<\/span> <span class=\"token parameter variable\">-r<\/span> <span class=\"token string\">&#034;logger.debug&#034;<\/span> src\/main\/java\/ <span class=\"token operator\">|<\/span> <span class=\"token function\">grep<\/span> <span class=\"token parameter variable\">-v<\/span> <span class=\"token string\">&#034;&#064;Test&#034;<\/span> <span class=\"token operator\">&gt;<\/span> debug_logs.txt<\/p>\n<p><span class=\"token comment\"># \u68c0\u67e5\u5faa\u73af\u5185\u7684\u65e5\u5fd7<\/span><br \/>\n<span class=\"token function\">grep<\/span> <span class=\"token parameter variable\">-r<\/span> <span class=\"token parameter variable\">-E<\/span> <span class=\"token string\">&#034;for \\\\(.&#043;\\\\) \\\\{.*logger\\\\.(debug|info|warn|error)&#034;<\/span> src\/main\/java\/ <span class=\"token operator\">&gt;<\/span> loop_logs.txt<\/p>\n<p><span class=\"token builtin class-name\">echo<\/span> <span class=\"token string\">&#034;\u65e5\u5fd7\u5ba1\u8ba1\u5b8c\u6210&#xff0c;\u8bf7\u67e5\u770bdebug_logs.txt\u548cloop_logs.txt&#034;<\/span><\/p>\n<h4>8.3 \u65e5\u5fd7\u6027\u80fd\u76d1\u63a7<\/h4>\n<p>\u5728\u76d1\u63a7\u7cfb\u7edf\u4e2d\u6dfb\u52a0\u65e5\u5fd7\u76f8\u5173\u76d1\u63a7\u6307\u6807&#xff1a;<\/p>\n<li>\u65e5\u5fd7\u6587\u4ef6\u589e\u957f\u901f\u5ea6<\/li>\n<li>\u65e5\u5fd7\u76ee\u5f55\u78c1\u76d8\u4f7f\u7528\u91cf<\/li>\n<li>\u65e5\u5fd7\u76f8\u5173\u7ebf\u7a0bCPU\u4f7f\u7528\u7387<\/li>\n<li>\u5e94\u7528GC\u9891\u7387&#xff08;\u65e5\u5fd7\u8fc7\u591a\u53ef\u80fd\u5bfc\u81f4\u9891\u7e41GC&#xff09;<\/li>\n<h3>\u603b\u7ed3<\/h3>\n<p>\u901a\u8fc7\u672c\u6b21\u6545\u969c\u6392\u67e5&#xff0c;\u6211\u4eec\u53d1\u73b0\u65e5\u5fd7\u6253\u5370\u8fc7\u591a\u5bf9\u7cfb\u7edf\u6027\u80fd\u7684\u5f71\u54cd\u975e\u5e38\u663e\u8457\u3002\u4e3b\u8981\u539f\u56e0\u5305\u62ec&#xff1a;\u65e5\u5fd7\u7ea7\u522b\u914d\u7f6e\u4e0d\u5408\u7406\u3001\u4f4e\u6548\u7684\u65e5\u5fd7\u683c\u5f0f\u3001\u672a\u4f18\u5316\u7684\u65e5\u5fd7\u4ee3\u7801\u4ee5\u53ca\u540c\u6b65\u65e5\u5fd7\u5e26\u6765\u7684I\/O\u74f6\u9888\u3002\u901a\u8fc7\u8c03\u6574\u65e5\u5fd7\u7ea7\u522b\u3001\u4f18\u5316\u65e5\u5fd7\u683c\u5f0f\u3001\u542f\u7528\u5f02\u6b65\u65e5\u5fd7\u548c\u6539\u8fdb\u65e5\u5fd7\u4ee3\u7801&#xff0c;\u7cfb\u7edf\u6027\u80fd\u5f97\u5230\u4e86\u663e\u8457\u63d0\u5347\u3002\u5728\u65e5\u5e38\u5f00\u53d1\u548c\u8fd0\u7ef4\u4e2d&#xff0c;\u6211\u4eec\u5e94\u8be5\u91cd\u89c6\u65e5\u5fd7\u7ba1\u7406&#xff0c;\u5236\u5b9a\u5408\u7406\u7684\u65e5\u5fd7\u89c4\u8303&#xff0c;\u5e76\u5b9a\u671f\u8fdb\u884c\u65e5\u5fd7\u5ba1\u8ba1&#xff0c;\u4ee5\u907f\u514d\u7c7b\u4f3c\u95ee\u9898\u7684\u53d1\u751f\u3002&#034;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb954\u6b21\uff0c\u70b9\u8d5e23\u6b21\uff0c\u6536\u85cf12\u6b21\u3002\u6458\u8981 \u67d0\u7535\u5546\u5e73\u53f0\u8ba2\u5355\u670d\u52a1\u51fa\u73b0\u54cd\u5e94\u7f13\u6162\u95ee\u9898\uff0c\u7ecf\u6392\u67e5\u53d1\u73b0\u65e5\u5fd7\u914d\u7f6e\u4e0d\u5f53\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u4e3b\u8981\u95ee\u9898\u5305\u62ec\uff1a1\uff09\u4e1a\u52a1\u5305\u4f7f\u7528debug\u7ea7\u522b\u65e5\u5fd7\u5bfc\u81f4\u5927\u91cf\u8f93\u51fa\uff1b2\uff09\u65e5\u5fd7\u683c\u5f0f\u5305\u542b\u884c\u53f7\u548c\u7c7b\u540d\u589e\u52a0\u5904\u7406\u5f00\u9500\uff1b3\uff09\u4ee3\u7801\u4e2d\u5faa\u73af\u5185\u6253\u5370\u65e5\u5fd7\u4e14\u672a\u505a\u7ea7\u522b\u68c0\u67e5\uff1b4\uff09\u76f4\u63a5\u6253\u5370\u590d\u6742\u5bf9\u8c61\u3002\u89e3\u51b3\u65b9\u6848\u5305\u62ec\u4f18\u5316\u65e5\u5fd7\u7ea7\u522b\u3001\u7b80\u5316\u65e5\u5fd7\u683c\u5f0f\u3001\u6dfb\u52a0\u5f02\u6b65\u8f93\u51fa\u53ca\u6539\u8fdb\u65e5\u5fd7\u6253\u5370\u65b9\u5f0f\u3002\u6d4b\u8bd5\u663e\u793a\u68c0\u67e5\u65e5\u5fd7\u7ea7\u522b\u53ef\u663e\u8457\u63d0\u5347\u6027\u80fd\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99,4046,58,98,292,43],"topic":[],"class_list":{"0":"post-43652","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-server","7":"tag-java","9":"tag-linux","10":"tag-spring-boot","11":"tag-292","12":"tag-43"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Linux \u670d\u52a1\u5668 Java \u65e5\u5fd7\u6027\u80fd\u6545\u969c\u5b9a\u4f4d\u5b9e\u6218\uff1a\u4ece\u7cfb\u7edf\u76d1\u63a7\u5230\u4ee3\u7801\u4f18\u5316\u7684\u5168\u6d41\u7a0b\u89e3\u6790 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/43652.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Linux \u670d\u52a1\u5668 Java \u65e5\u5fd7\u6027\u80fd\u6545\u969c\u5b9a\u4f4d\u5b9e\u6218\uff1a\u4ece\u7cfb\u7edf\u76d1\u63a7\u5230\u4ee3\u7801\u4f18\u5316\u7684\u5168\u6d41\u7a0b\u89e3\u6790 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" 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