{"id":8287,"date":"2023-11-28T20:20:51","date_gmt":"2023-11-28T12:20:51","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=8287"},"modified":"2023-11-28T20:22:54","modified_gmt":"2023-11-28T12:22:54","slug":"java-zhongminor-gc-he-major-gc-de-qu-bie","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/java-zhongminor-gc-he-major-gc-de-qu-bie\/","title":{"rendered":"Java\u4e2dMinor GC \u548c Major GC\u7684\u533a\u522b\uff1f"},"content":{"rendered":"<p>GC\u7684\u5206\u7c7b<br \/>\nJVM\u5728\u8fdb\u884cGC\u65f6\uff0c\u53ef\u80fd\u9488\u5bf9\u4e09\u4e2a\u533a\u57df\u8fdb\u884c\u5783\u573e\u56de\u6536\u5206\u522b\u662f\u65b0\u751f\u4ee3\u3001\u8001\u5e74\u4ee3\u3001\u65b9\u6cd5\u533a\uff0c\u5927\u90e8\u5206\u65f6\u5019\u56de\u6536\u7684\u90fd\u662f\u65b0\u751f\u4ee3\u3002GC\u7c7b\u578b\u4e3b\u8981\u6709\u4ee5\u4e0b\u56db\u79cd\u7c7b\u578b\u3002<\/p>\n<p>\u65b0\u751f\u4ee3\u6536\u96c6(Minor GC\/Young GC):<br \/>\n\u53ea\u9488\u5bf9\u65b0\u751f\u4ee3\u7684\u5783\u573e\u6536\u96c6\u3002\u5177\u4f53\u70b9\u7684\u662f Eden\u533a\u6ee1\u65f6\u89e6\u53d1GC\u3002Survivor\u6ee1\u4e0d\u4f1a\u89e6\u53d1Minor GC\u3002<br \/>\n\u8001\u5e74\u4ee3\u6536\u96c6(Major GC\/Old GC):<br \/>\n\u53ea\u9488\u5bf9\u8001\u5e74\u4ee3\u7684\u5783\u573e\u6536\u96c6\u3002\u76ee\u524d\uff0c\u53ea\u6709CMS\u6536\u96c6\u5668\u4f1a\u6709\u5355\u72ec\u6536\u96c6\u8001\u5e74\u4ee3\u7684\u884c\u4e3a\u3002<br \/>\n\u6df7\u5408\u6536\u96c6(Mixed GC):<br \/>\n\u6307\u76ee\u6807\u662f\u6536\u96c6\u6574\u4e2a\u65b0\u751f\u4ee3\u4ee5\u53ca\u90e8\u5206\u8001\u5e74\u4ee3\u7684\u5783\u573e\u6536\u96c6\u3002\u76ee\u524d\u53ea\u6709G1\u6536\u96c6\u5668\u4f1a\u6709\u8fd9\u79cd\u884c\u4e3a\u3002<br \/>\n\u6574\u5806\u6536\u96c6(Full GC):<br \/>\n\u6536\u96c6\u6574\u4e2aJava\u5806\u548c\u65b9\u6cd5\u533a\u7684\u5783\u573e\u6536\u96c6\u3002<br \/>\n1\u3001Minor GC<br \/>\n\u5f53\u65b0\u751f\u4ee3(Eden \u533a)\u6ee1\u65f6\u5c31\u4f1a\u89e6\u53d1Minor GC\uff0c\u8fd9\u91cc\u7684\u65b0\u751f\u4ee3\u6ee1\u6307\u7684\u662fEden\u533a\u6ee1\u3002Survivor \u6ee1\u4e0d\u4f1a\u89e6\u53d1 Minor GC\u3002\u5bf9\u4e8e\u5927\u90e8\u5206\u5e94\u7528\u7a0b\u5e8f\uff0cMinor GC\u64cd\u4f5c\u65f6\u5e94\u7528\u7a0b\u5e8f\u505c\u987f\u5bfc\u81f4\u7684\u5ef6\u8fdf\u90fd\u662f\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\u7684\u3002\u5927\u90e8\u5206 Eden \u533a\u4e2d\u7684\u5bf9\u8c61\u90fd\u80fd\u88ab\u8ba4\u4e3a\u662f\u5783\u573e,\u6c38\u8fdc\u4e5f\u4e0d\u4f1a\u88ab\u590d\u5236\u5230 Survivor\u533a\u6216\u8005\u8001\u5e74\u4ee3\u7a7a\u95f4\u3002\u5982\u679c\u6b63\u597d\u76f8\u53cd\uff0cEden \u533a\u5927\u90e8\u5206\u65b0\u751f\u5bf9\u8c61\u4e0d\u7b26\u5408GC\u6761\u4ef6\uff0cMinor GC\u6267\u884c\u65f6\u6682\u505c\u7684\u65f6\u95f4\u5c06\u4f1a\u957f\u5f88\u591a\u3002<br \/>\n2\u3001Major GC<br \/>\n\u5f53\u8001\u5e74\u4ee3\u6ee1\u65f6\u4f1a\u89e6\u53d1MajorGC,\u53ea\u6709CMS\u6536\u96c6\u5668\u4f1a\u6709\u5355\u72ec\u6536\u96c6\u8001\u5e74\u4ee3\u7684\u884c\u4e3a\uff0c\u5176\u4ed6\u6536\u96c6\u5668\u5747\u65e0\u6b64\u884c\u4e3a\u3002\u800c\u9488\u5bf9\u65b0\u751f\u4ee3\u7684MinorGC,\u5404\u4e2a\u6536\u96c6\u5668\u5747\u652f\u6301\u3002\u603b\u4e4b,\u5355\u72ec\u53d1\u751f\u6536\u96c6\u884c\u4e3a\u7684\u53ea\u6709\u65b0\u751f\u4ee3\uff0c\u9664\u4e86CMS\u6536\u96c6\u5668,\u90fd\u4e0d\u652f\u6301\u5355\u72ec\u56de\u6536\u8001\u5e74\u4ee3\u3002<br \/>\n3\u3001Full GC<br \/>\nFull GC\u662f\u9488\u5bf9\u65b0\u751f\u4ee3\uff0c\u8001\u5e74\u4ee3\u548c\u65b9\u6cd5\u533a(\u5143\u7a7a\u95f4)\u7684\u5783\u573e\u6536\u96c6\u3002Full GC\u4ea7\u751f\u7684\u6761\u4ef6:<br \/>\n1\u3001\u8c03\u7528System.gc() \u65f6\uff0c\u7cfb\u7edf\u5efa\u8bae\u6267\u884cFull GC\uff0c\u4f46\u662f\u4e0d\u4e00\u5b9a\u4f1a\u6267\u884c\u3002<br \/>\n2\u3001\u8001\u5e74\u4ee3\u7a7a\u95f4\u4e0d\u8db3\u3002<br \/>\n3\u3001\u65b9\u6cd5\u533a\u7a7a\u95f4\u4e0d\u8db3,\u7c7b\u5378\u8f7d\uff08\u7c7b\u5378\u8f7d\u4e09\u4e2a\u6761\u4ef6\uff09\u3002<br \/>\n4\u3001\u901a\u8fc7 Minor GC\u540e\u8fdb\u5165\u8001\u5e74\u4ee3\u7684\u7a7a\u95f4\u5927\u4e8e\u8001\u5e74\u4ee3\u7684\u53ef\u7528\u5185\u5b58<br \/>\n5\u3001\u5185\u5b58\u7a7a\u95f4\u62c5\u4fdd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>GC\u7684\u5206\u7c7b JVM\u5728\u8fdb\u884cGC\u65f6\uff0c\u53ef\u80fd\u9488\u5bf9\u4e09\u4e2a\u533a\u57df\u8fdb\u884c\u5783\u573e\u56de\u6536\u5206\u522b\u662f\u65b0\u751f\u4ee3\u3001\u8001\u5e74\u4ee3\u3001\u65b9\u6cd5\u533a\uff0c\u5927\u90e8\u5206\u65f6\u5019\u56de\u6536\u7684\u90fd\u662f [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[99],"tags":[],"class_list":["post-8287","post","type-post","status-publish","format-standard","hentry","category-javabase"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8287","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=8287"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8287\/revisions"}],"predecessor-version":[{"id":8288,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8287\/revisions\/8288"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=8287"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=8287"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=8287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}