G1\uff08Garbage-First\uff09\u662fJava\u865a\u62df\u673a\u4e2d\u4e00\u79cd\u9762\u5411\u5927\u5806\u5185\u5b58\u7684\u5783\u573e\u56de\u6536\u5668\uff0c\u5b83\u5728JDK 7\u5f15\u5165\uff0c\u4e3b\u8981\u9488\u5bf9\u9700\u8981\u5927\u5806\u5185\u5b58\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u63d0\u4f9b\u66f4\u53ef\u63a7\u3001\u53ef\u9884\u6d4b\u7684\u5783\u573e\u56de\u6536\u6027\u80fd\u3002\u4ee5\u4e0b\u662fG1\u5783\u573e\u56de\u6536\u5668\u7684\u4e00\u4e9b\u91cd\u8981\u53c2\u6570\uff1a<\/p>\n
-XX:+UseG1GC<\/code><\/li>\n- \u901a\u8fc7\u8fd9\u4e2a\u53c2\u6570\uff0c\u542f\u7528G1\u5783\u573e\u56de\u6536\u5668\u3002<\/li>\n<\/ul>\n<\/li>\n
- \n\u8bbe\u7f6e\u5e74\u8f7b\u4ee3\uff08Young Generation\uff09\u7684\u521d\u59cb\u548c\u6700\u5927\u5927\u5c0f\uff1a<\/strong><\/p>\n
\n-Xms<\/code>: \u8bbe\u7f6e\u5806\u7684\u521d\u59cb\u5927\u5c0f<\/li>\n-Xmx<\/code>: \u8bbe\u7f6e\u5806\u7684\u6700\u5927\u5927\u5c0f<\/li>\n-Xmn<\/code>: \u8bbe\u7f6e\u5e74\u8f7b\u4ee3\u7684\u5927\u5c0f<\/li>\n- \u4f8b\u5982\uff1a
-Xms4g -Xmx4g -Xmn1g<\/code><\/li>\n<\/ul>\n<\/li>\n- \n\u8bbe\u7f6eG1\u7684\u76ee\u6807\u505c\u987f\u65f6\u95f4\uff1a<\/strong><\/p>\n
\n-XX:MaxGCPauseMillis=<max-pause-time><\/code><\/li>\n- \u901a\u8fc7\u8fd9\u4e2a\u53c2\u6570\uff0c\u8bbe\u7f6eG1\u7684\u671f\u671b\u7684\u6700\u5927\u505c\u987f\u65f6\u95f4\uff0cG1\u4f1a\u5c3d\u529b\u8fbe\u5230\u8fd9\u4e2a\u76ee\u6807\u3002<\/li>\n<\/ul>\n<\/li>\n
- \n\u8bbe\u7f6e\u5e76\u884c\u5ea6\uff08Parallelism\uff09\uff1a<\/strong><\/p>\n
\n-XX:ParallelGCThreads=<num><\/code><\/li>\n- \u8fd9\u4e2a\u53c2\u6570\u7528\u4e8e\u8bbe\u7f6eG1\u5783\u573e\u56de\u6536\u5668\u7684\u5e76\u884c\u6536\u96c6\u7ebf\u7a0b\u6570\u3002\u6839\u636e\u786c\u4ef6\u73af\u5883\uff0c\u901a\u5e38\u8bbe\u7f6e\u4e0e\u5904\u7406\u5668\u6570\u91cf\u76f8\u5f53\u7684\u503c\u3002<\/li>\n<\/ul>\n<\/li>\n
- \n\u8bbe\u7f6e\u8001\u5e74\u4ee3\uff08Old Generation\uff09\u7684\u6700\u5927\u5927\u5c0f\uff1a<\/strong><\/p>\n
\n-XX:MaxGCPauseMillis=<max-pause-time><\/code><\/li>\n- \u8bbe\u7f6e\u8001\u5e74\u4ee3\u7684\u6700\u5927\u5927\u5c0f\uff0c\u4ee5\u786e\u4fddG1\u5783\u573e\u56de\u6536\u5668\u6709\u8db3\u591f\u7684\u7a7a\u95f4\u6267\u884c\u5783\u573e\u56de\u6536\u3002<\/li>\n<\/ul>\n<\/li>\n
- \n\u8bbe\u7f6e\u521d\u59cb\u6807\u8bb0\u9636\u6bb5\u7684\u8017\u65f6\u76ee\u6807\uff1a<\/strong><\/p>\n
\n-XX:InitiatingHeapOccupancyPercent=<percent><\/code><\/li>\n- \u8fd9\u4e2a\u53c2\u6570\u8bbe\u7f6e\u5728\u521d\u59cb\u6807\u8bb0\u9636\u6bb5\u89e6\u53d1\u65f6\u5806\u7684\u5360\u7528\u7387\u76ee\u6807\u767e\u5206\u6bd4\u3002\u9ed8\u8ba4\u503c\u662f45\u3002<\/li>\n<\/ul>\n<\/li>\n
- \n\u8bbe\u7f6eMixed GC\u9608\u503c\uff1a<\/strong><\/p>\n
\n-XX:G1MixedGCLiveThresholdPercent=<percent><\/code><\/li>\n- \u8fd9\u4e2a\u53c2\u6570\u8bbe\u7f6e\u89e6\u53d1Mixed GC\uff08\u6df7\u5408\u5783\u573e\u56de\u6536\uff09\u7684\u9608\u503c\u3002\u9ed8\u8ba4\u503c\u662f65\u3002<\/li>\n<\/ul>\n<\/li>\n
- \n\u8bbe\u7f6e\u664b\u5347\u5230\u8001\u5e74\u4ee3\u7684\u5bf9\u8c61\u5e74\u9f84\u9608\u503c\uff1a<\/strong><\/p>\n
\n-XX:TargetSurvivorRatio=<ratio><\/code><\/li>\n- \u8bbe\u7f6e\u664b\u5347\u5230\u8001\u5e74\u4ee3\u7684\u5bf9\u8c61\u5728Survivor\u533a\u4e2d\u7684\u5b58\u6d3b\u6bd4\u4f8b\u3002\u9ed8\u8ba4\u503c\u662f50\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
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