{"id":1807,"date":"2022-02-05T19:30:37","date_gmt":"2022-02-05T11:30:37","guid":{"rendered":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=1807"},"modified":"2023-07-20T11:12:10","modified_gmt":"2023-07-20T03:12:10","slug":"jvm%e7%9a%84%e4%b8%80%e4%ba%9b%e5%8f%82%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=1807","title":{"rendered":"jvm\u7684\u4e00\u4e9b\u53c2\u6570\uff0c\u8c03\u4f18\u57fa\u7840"},"content":{"rendered":"\n<pre class=\"wp-block-preformatted\">-XX:+PrintGC\n+\u8868\u793a\u5f00\u542f\uff0c-\u8868\u793a\u5173\u95ed\n\u53ef\u4ee5\u7528jinfo \u6765\u67e5\u5177\u4f53\u7684\u914d\u7f6e\u662f\u5426\u5f00\u542f\n-XX:+PrintGCDetails<\/pre>\n\n\n\n<pre class=\"wp-block-preformatted\">jps -l \u6253\u5370java\u7a0b\u5e8f<\/pre>\n\n\n\n<pre class=\"wp-block-preformatted\">\u6307\u5b9a\u65b0\u751f\u4ee3\u7684\u5185\u5b58\uff1a-Xmn\n\u65b0\u751f\u4ee3\uff08eden+from+to\uff09\u548c\u8001\u5e74\u4ee3\uff08\u4e0d\u5305\u542b\u6c38\u4e45\u533a\uff09\u7684\u6bd4\u503c\uff1a-XX:NewRatio\nSurvivor\u533a\u4e0eEden\u533a\u7684\u6bd4\u503c\uff1a-XX:SurvivorRatio\n\n\u8fd92\u4e2a\u6bd4\u503c\u7684\u8ba1\u7b97\u89c4\u5219\u5982\u4e0b\uff1a\n\n\u82e5-XX:NewRatio=4\uff0c\u5219\u8868\u793a\u65b0\u751f\u4ee3\uff1a\u8001\u5e74\u4ee3=1:4\uff0c\u90a3\u4e48\u65b0\u751f\u4ee3\uff08eden+from+to\uff09=3072+512+512=4096k\uff0c\u8001\u5e74\u4ee3=16384k\uff0c\u65b0\u751f\u4ee3\uff1a\u8001\u5e74\u4ee3=4096k\uff1a16384k=1:4\u3002\n\n\u82e5-XX:SurvivorRatio=6\uff0c\u5219\u8868\u793aSurvivor\u533a\uff1aEden\u533a=2:6\uff0c\u90a3\u4e48Survivor\u533a\uff08from+to\uff09=1024+1024=2048\uff0cEden\u533a=6144\uff0cSurvivor\u533a\uff1aEden\u533a=2048:6144=2:6\uff0c\u8fd9\u6837\u7684\u8bdd\uff0c\u4e00\u4e2a\u5e78\u5b58\u533a\u5360\u6574\u4e2a\u65b0\u751f\u4ee3\u533a\u76841\uff1a\uff082+6\uff09=1\/8\n<\/pre>\n\n\n\n<pre class=\"wp-block-preformatted\">jinfo -flags pid<\/pre>\n\n\n\n<p><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/100698894\">\u5e38\u7528\u7684JVM\u53c2\u6570\uff0c\u4f60\u77e5\u9053\u591a\u5c11\uff1f &#8211; \u77e5\u4e4e (zhihu.com)<\/a><\/p>\n\n\n\n<p>\u8fd9\u91cc\u5c31\u4e0d\u5b8c\u5168\u8bb0\u5f55\u4e86\uff0c\u641c\u4e00\u4e0b\u5373\u53ef<\/p>\n\n\n\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u4f8b\u5b50\uff0c\u5c55\u793a\u5982\u4f55\u8fdb\u884c\u57fa\u672c\u7684JVM\u8c03\u4f18\uff0c\u4e3b\u8981\u9488\u5bf9\u5806\u5185\u5b58\u548cGC\u7684\u8c03\u6574\uff1a<\/p>\n\n\n\n<ol>\n<li><strong>\u8bbe\u7f6e\u5806\u5185\u5b58\u5927\u5c0f<\/strong>\uff1a\u5806\u5185\u5b58\u662fJava\u7528\u4e8e\u52a8\u6001\u5206\u914d\u5185\u5b58\u7684\u5730\u65b9\uff0c\u662f\u5783\u573e\u6536\u96c6\u5668\u7ba1\u7406\u7684\u4e3b\u8981\u533a\u57df\u3002Java\u5e94\u7528\u9700\u8981\u8db3\u591f\u7684\u5806\u5185\u5b58\u6765\u521b\u5efa\u548c\u64cd\u4f5c\u5bf9\u8c61\u3002\u4ee5\u4e0b\u662f\u4e24\u4e2a\u8bbe\u7f6e\u5806\u5185\u5b58\u5927\u5c0f\u7684\u53c2\u6570\uff1abashCopy code<code>-Xms1024m # 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