{"id":4207,"date":"2019-05-04T16:24:20","date_gmt":"2019-05-04T08:24:20","guid":{"rendered":"http:\/\/www.xttblog.com\/?p=4207"},"modified":"2019-05-04T16:24:20","modified_gmt":"2019-05-04T08:24:20","slug":"mysql%e7%9a%84%e9%ab%98%e5%b9%b6%e5%8f%91%e5%a4%84%e7%90%86%e6%8a%80%e6%9c%afmvcc","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=4207","title":{"rendered":"MySQL\u7684\u9ad8\u5e76\u53d1\u5904\u7406\u6280\u672fMVCC"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u6700\u8fd1\u4e94\u4e00\u653e\u5047\uff0c\u9664\u4e86\u5e26\u5c0f\u5b69\u5230\u5904\u8f6c\u8f6c\u5916\uff0c\u8fd8\u770b\u4e86\u51e0\u9875\u300a\u9ad8\u6027\u80fdMySQL\u300b\u3002\u53e6\u5916\u5bb6\u91cc\u8fd8\u6709\u4e00\u672c\u300a\u9ad8\u53ef\u7528MySQL\u300b\uff0c\u8fd9\u90fd\u662f\u4ee5\u524d\u5728 CSDN \u5199\u4f5c\u65f6\u9001\u7684\u4e66\u3002\u524d\u524d\u540e\u540e\u5927\u6982 40 \u591a\u672c\uff0c\u4e4b\u524d\u642c\u5bb6\u8fd8\u6254\u6389\u4e00\u4e9b\uff0c\u53ef\u60dc\u4e86\u3002\u3002\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u90fd\u77e5\u9053\uff0c\u5728 MySQL \u4e2d\u6709\u975e\u5e38\u591a\u7684\u9501\u3002\u6bd4\u5982\uff1a\u5171\u4eab\u9501\uff0c\u6392\u5b83\u9501\uff1b\u8868\u9501\uff0c\u884c\u9501\uff1b\u8bfb\u9501\uff0c\u5199\u9501\u7b49\u3002\u8fd9\u4e9b\u9501\u5728\u5904\u7406\u6570\u636e\u65f6\uff0c\u5f80\u5f80\u4f1a\u964d\u4f4e MySQL \u7cfb\u7edf\u7684\u5e76\u53d1\u5904\u7406\u80fd\u529b\u3002\u6700\u65e9\u7684\u6570\u636e\u5e93\u7cfb\u7edf\uff0c\u53ea\u6709\u8bfb\u8bfb\u4e4b\u95f4\u53ef\u4ee5\u5e76\u53d1\uff0c\u8bfb\u5199\uff0c\u5199\u8bfb\uff0c\u5199\u5199\u90fd\u8981\u963b\u585e\u3002\u5f15\u5165\u591a\u7248\u672c\u4e4b\u540e\uff0c\u53ea\u6709\u5199\u5199\u4e4b\u95f4\u76f8\u4e92\u963b\u585e\uff0c\u5176\u4ed6\u4e09\u79cd\u64cd\u4f5c\u90fd\u53ef\u4ee5\u5e76\u884c\uff0c\u8fd9\u6837\u5927\u5e45\u5ea6\u63d0\u9ad8\u4e86InnoDB\u7684\u5e76\u53d1\u5ea6\u3002\u591a\u7248\u672c\u5904\u7406\u6280\u672f\u4e5f\u5c31\u662f\u6211\u4eec\u4eca\u5929\u8981\u8bf4\u7684 MVCC\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MVCC \u7b80\u5355\u7684\u5c31\u662f\u8bf4\uff0c\u5728 InnoDB \u4e2d\uff0c\u4f1a\u5728\u6bcf\u884c\u6570\u636e\u540e\u6dfb\u52a0\u4e24\u4e2a\u989d\u5916\u7684\u9690\u85cf\u7684\u503c\u6765\u5b9e\u73b0 MVCC\uff0c\u8fd9\u4e24\u4e2a\u503c\u4e00\u4e2a\u8bb0\u5f55\u8fd9\u884c\u6570\u636e\u4f55\u65f6\u88ab\u521b\u5efa\uff0c\u53e6\u5916\u4e00\u4e2a\u8bb0\u5f55\u8fd9\u884c\u6570\u636e\u4f55\u65f6\u8fc7\u671f\uff08\u6216\u8005\u88ab\u5220\u9664\uff09\u3002 <br> \u5728\u5b9e\u9645\u64cd\u4f5c\u4e2d\uff0c\u5b58\u50a8\u7684\u5e76\u4e0d\u662f\u65f6\u95f4\uff0c\u800c\u662f\u4e8b\u52a1\u7684\u7248\u672c\u53f7\uff0c\u6bcf\u5f00\u542f\u4e00\u4e2a\u65b0\u4e8b\u52a1\uff0c\u4e8b\u52a1\u7684\u7248\u672c\u53f7\u5c31\u4f1a\u9012\u589e\u3002\u6bcf\u884c\u6570\u636e\u589e\u52a0\u4e00\u4e2a\u7248\u672c\u6807\u8bc6\uff0c\u5728\u57fa\u4e8e\u6570\u636e\u5e93\u8868\u7684\u7248\u672c\u89e3\u51b3\u65b9\u6848\u4e2d\uff0c\u4e00\u822c\u662f\u901a\u8fc7\u4e3a\u6570\u636e\u5e93\u8868\u589e\u52a0\u4e00\u4e2a \u201cversion\u201d \u5b57\u6bb5\u6765\u5b9e\u73b0\u3002\u8bfb\u53d6\u51fa\u6570\u636e\u65f6\uff0c\u5c06\u6b64\u7248\u672c\u53f7\u4e00\u540c\u8bfb\u51fa\uff0c\u4e4b\u540e\u66f4\u65b0\u65f6\uff0c\u5bf9\u6b64\u7248\u672c\u53f7\u52a0\u4e00\u3002\u6b64\u65f6\uff0c\u5c06\u63d0\u4ea4\u6570\u636e\u7684\u7248\u672c\u6570\u636e\u4e0e\u6570\u636e\u5e93\u8868\u5bf9\u5e94\u8bb0\u5f55\u7684\u5f53\u524d\u7248\u672c\u4fe1\u606f\u8fdb\u884c\u6bd4\u5bf9\uff0c\u5982\u679c\u63d0\u4ea4\u7684\u6570\u636e\u7248\u672c\u53f7\u5927\u4e8e\u6570\u636e\u5e93\u8868\u5f53\u524d\u7248\u672c\u53f7\uff0c\u5219\u4e88\u4ee5\u66f4\u65b0\uff0c\u5426\u5219\u8ba4\u4e3a\u662f\u8fc7\u671f\u6570\u636e\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/wx1.sinaimg.cn\/large\/8fa5dcfcly1g2pd0t9lczj20hi09mgon.jpg\" alt=\"\" \/><figcaption>MVCC \u539f\u7406<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u770b\u5230\u8fd9\u91cc\uff0c\u6211\u76f8\u4fe1\u5f88\u591a\u4eba\u4f1a\u60f3\u8d77 CAS \u64cd\u4f5c\u3002\u8fd9\u4e2a MVCC \u4e0d\u5c31\u662f\u548c CAS \u64cd\u4f5c\u6709\u4e9b\u7c7b\u4f3c\u5417\uff1f\u5176\u5b9e\u7a0b\u5e8f\u4e16\u754c\u91cc\u7684\u5f88\u591a\u4e1c\u897f\u90fd\u662f\u7c7b\u4f3c\u7684\uff0c\u5982\u679c\u4f60\u770b\u8fc7\u300aUNIX\u7f51\u7edc\u7f16\u7a0b\u300b\u4f60\u4f1a\u53d1\u73b0\uff0cJava \u4e2d\u7684\u5e76\u53d1\u7f16\u7a0b\u6a21\u578b\u5176\u5b9e\u4e5f\u90fd\u662f\u53c2\u8003\u64cd\u4f5c\u7cfb\u7edf\u5e95\u5c42\u4e2d\u7684\u4e00\u4e9b\u5e76\u53d1\u7f16\u7a0b\u6a21\u578b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5927\u9053\u81f3\u7b80\uff0c\u6211\u60f3\u8d77\u4e86\u6211\u524d\u9762\u6709\u6587\u7ae0\u4e2d\u5199\u8fc7\u8fd9\u4e9b\u8bdd\u3002MVCC \u5728 MySQL \u9ed8\u8ba4\u4e8b\u52a1\u9694\u79bb\u7ea7\u522b\u4e0b\u7684\u591a\u7248\u672c\u5904\u7406\u903b\u8f91\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>SELECT \u65f6\uff0c\u8bfb\u53d6\u521b\u5efa\u7248\u672c\u53f7&lt;=\u5f53\u524d\u4e8b\u52a1\u7248\u672c\u53f7\uff0c\u5220\u9664\u7248\u672c\u53f7\u4e3a\u7a7a\u6216&gt;\u5f53\u524d\u4e8b\u52a1\u7248\u672c\u53f7\u3002<\/li><li>INSERT \u65f6\uff0c\u4fdd\u5b58\u5f53\u524d\u4e8b\u52a1\u7248\u672c\u53f7\u4e3a\u884c\u7684\u521b\u5efa\u7248\u672c\u53f7<\/li><li>DELETE \u65f6\uff0c\u4fdd\u5b58\u5f53\u524d\u4e8b\u52a1\u7248\u672c\u53f7\u4e3a\u884c\u7684\u5220\u9664\u7248\u672c\u53f7<\/li><li>UPDATE \u65f6\uff0c\u63d2\u5165\u4e00\u6761\u65b0\u7eaa\u5f55\uff0c\u4fdd\u5b58\u5f53\u524d\u4e8b\u52a1\u7248\u672c\u53f7\u4e3a\u884c\u521b\u5efa\u7248\u672c\u53f7\uff0c\u540c\u65f6\u4fdd\u5b58\u5f53\u524d\u4e8b\u52a1\u7248\u672c\u53f7\u5230\u539f\u6765\u5220\u9664\u7684\u884c <\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7 MVCC\uff0c\u867d\u7136\u6bcf\u884c\u8bb0\u5f55\u90fd\u9700\u8981\u989d\u5916\u7684\u5b58\u50a8\u7a7a\u95f4\uff0c\u66f4\u591a\u7684\u884c\u68c0\u67e5\u5de5\u4f5c\u4ee5\u53ca\u4e00\u4e9b\u989d\u5916\u7684\u7ef4\u62a4\u5de5\u4f5c\uff0c\u4f46\u53ef\u4ee5\u51cf\u5c11\u9501\u7684\u4f7f\u7528\uff0c\u5927\u591a\u6570\u8bfb\u64cd\u4f5c\u90fd\u4e0d\u7528\u52a0\u9501\uff0c\u8bfb\u6570\u636e\u64cd\u4f5c\u5f88\u7b80\u5355\uff0c\u6027\u80fd\u5f88\u597d\uff0c\u5e76\u4e14\u4e5f\u80fd\u4fdd\u8bc1\u53ea\u4f1a\u8bfb\u53d6\u5230\u7b26\u5408\u6807\u51c6\u7684\u884c\uff0c\u4e5f\u53ea\u9501\u4f4f\u5fc5\u8981\u884c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u603b\u7684\u6765\u8bf4\uff0cMVCC \u6709\u4e0b\u9762\u51e0\u4e2a\u7279\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6bcf\u884c\u6570\u636e\u90fd\u5b58\u5728\u4e00\u4e2a\u7248\u672c\uff0c\u6bcf\u6b21\u6570\u636e\u66f4\u65b0\u65f6\u90fd\u66f4\u65b0\u8be5\u7248\u672c<\/li><li>\u4fee\u6539\u65f6 Copy \u51fa\u5f53\u524d\u7248\u672c, \u7136\u540e\u968f\u610f\u4fee\u6539\uff0c\u5404\u4e2a\u4e8b\u52a1\u4e4b\u95f4\u65e0\u5e72\u6270<\/li><li>\u4fdd\u5b58\u65f6\u6bd4\u8f83\u7248\u672c\u53f7\uff0c\u5982\u679c\u6210\u529f(commit)\uff0c\u5219\u8986\u76d6\u539f\u8bb0\u5f55, \u5931\u8d25\u5219\u653e\u5f03 copy(rollback)<\/li><li>\u5c31\u662f\u6bcf\u884c\u90fd\u6709\u7248\u672c\u53f7\uff0c\u4fdd\u5b58\u65f6\u6839\u636e\u7248\u672c\u53f7\u51b3\u5b9a\u662f\u5426\u6210\u529f\uff0c\u542c\u8d77\u6765\u542b\u6709\u4e50\u89c2\u9501\u7684\u5473\u9053, \u56e0\u4e3a\u8fd9\u770b\u8d77\u6765\u6b63\u662f\uff0c\u5728\u63d0\u4ea4\u7684\u65f6\u5019\u624d\u80fd\u77e5\u9053\u5230\u5e95\u80fd\u5426\u63d0\u4ea4\u6210\u529f <\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5173\u4e8e MVCC \u6682\u65f6\u603b\u7ed3\u5230\u8fd9\u91cc\u3002\u73b0\u5728\u5b9a\u4e00\u4e2a\u76ee\u6807\uff0c\u82b1\u4e00\u4e2a\u6708\u7684\u65f6\u95f4\u628a\u6781\u5ba2\u65f6\u95f4\u7684\u300aMySQL\u5b9e\u621845\u8bb2\u300b\u770b\u8fc7\u3002\u8fd9\u4e2a\u8bfe\u7a0b\u5e76\u4e0d\u662f\u589e\u5220\u6539\u67e5\u8fd9\u4e48\u7b80\u5355\uff0c\u66f4\u591a\u7684\u662f\u8bb2\u5e95\u5c42\u539f\u7406\u3002\u5982\u679c\u6709\u9700\u8981\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u4e00\u8d77\u5b66\u4e60\u4ea4\u6d41\uff0c\u60f3\u8981\u8d2d\u4e70\u8fd9\u4e48\u8bfe\u7a0b\u7684\uff0c\u901a\u8fc7\u6211\u7684\u6d77\u62a5\u4e8c\u7ef4\u7801\u8d2d\u4e70\uff0c\u8fd4\u73b024\u3002<\/p>\n<!-- <audio autoplay=\"autoplay\" height=\"100\" width=\"100\" hidden=\"true\"><source src=\"https:\/\/c.coka.la\/orAvPR.mp3\" type=\"audio\/mp3\"\/><\/audio><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/ws3.sinaimg.cn\/large\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/> --><p><!-- <img decoding=\"async\" src=\"https:\/\/raw.githubusercontent.com\/xmt1139057136\/xttblog\/master\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/>--><img decoding=\"async\" src=\"https:\/\/saas.51autoparts.cn\/api\/admin\/sys-file\/oss\/file?fileName=84db51f8561e448f9a4fda2eff0811f9.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/><\/p><p>\u6700\u540e\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u4e2a\u4eba\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u4e1a\u4f59\u8349\uff08yyucao\uff09\uff01<b>\u53ef\u52a0\u4f5c\u8005\u5fae\u4fe1\u53f7\uff1a<font color=\"red\">xttblog2<\/font>\u3002\u5907\u6ce8\uff1a\u201c1\u201d\uff0c\u6dfb\u52a0\u535a\u4e3b\u5fae\u4fe1\u62c9\u4f60\u8fdb\u5fae\u4fe1\u7fa4\u3002\u5907\u6ce8\u9519\u8bef\u4e0d\u4f1a\u540c\u610f\u597d\u53cb\u7533\u8bf7\u3002<\/b>\u518d\u6b21\u611f\u8c22\u60a8\u7684\u5173\u6ce8\uff01\u540e\u7eed\u6709\u7cbe\u5f69\u5185\u5bb9\u4f1a\u7b2c\u4e00\u65f6\u95f4\u53d1\u7ed9\u60a8\uff01\u539f\u521b\u6587\u7ae0\u6295\u7a3f\u8bf7\u53d1\u9001\u81f3532009913@qq.com\u90ae\u7bb1\u3002\u5546\u52a1\u5408\u4f5c\u4e5f\u53ef\u6dfb\u52a0\u4f5c\u8005\u5fae\u4fe1\u8fdb\u884c\u8054\u7cfb\uff01<\/p><p>\u672c\u6587\u539f\u6587\u51fa\u5904\uff1a<a href=\"https:\/\/www.xttblog.com\">\u4e1a\u4f59\u8349<\/a>\uff1a &raquo; <a href=\"https:\/\/www.xttblog.com\/?p=4207\">MySQL\u7684\u9ad8\u5e76\u53d1\u5904\u7406\u6280\u672fMVCC<\/a><\/p><!-- <div class=\"bd-reward-stl\"><button id=\"bdRewardBtn\"><span><\/span><\/button><\/div> -->","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\u4e94\u4e00\u653e\u5047\uff0c\u9664\u4e86\u5e26\u5c0f\u5b69\u5230\u5904\u8f6c\u8f6c\u5916\uff0c\u8fd8\u770b\u4e86\u51e0\u9875\u300a\u9ad8\u6027\u80fdMySQL\u300b\u3002\u53e6\u5916\u5bb6\u91cc\u8fd8\u6709\u4e00\u672c\u300a\u9ad8\u53ef\u7528MySQL\u300b\uff0c\u8fd9\u90fd [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[1968,83,580,392,393],"class_list":["post-4207","post","type-post","status-publish","format-standard","hentry","category-sql","tag-mvcc","tag-mysql","tag-mysql----dba"],"_links":{"self":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/4207","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4207"}],"version-history":[{"count":1,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/4207\/revisions"}],"predecessor-version":[{"id":4208,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/4207\/revisions\/4208"}],"wp:attachment":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4207"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4207"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4207"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}