{"id":75974,"date":"2024-10-16T02:48:15","date_gmt":"2024-10-15T18:48:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75974\/"},"modified":"2024-10-16T02:48:15","modified_gmt":"2024-10-15T18:48:15","slug":"mysql-%e4%bc%ba%e6%9c%8d%e5%99%a8%e7%9a%84%e5%85%a7%e9%83%a8%e9%8e%96%e5%ae%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75974\/","title":{"rendered":"MySQL \u4f3a\u670d\u5668\u7684\u5167\u90e8\u9396\u5b9a"},"content":{"rendered":"<h1 id=\"mysql-%e4%bc%ba%e6%9c%8d%e5%99%a8%e7%9a%84%e5%85%a7%e9%83%a8%e9%8e%96%e5%ae%9a-fRFylWUbCh\">MySQL \u4f3a\u670d\u5668\u7684\u5167\u90e8\u9396\u5b9a<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL \u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u9078\u64c7\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u9ad8\u6548\u80fd\u548c\u53ef\u9760\u6027\u7684\u61c9\u7528\u4e2d\u3002\u5167\u90e8\u9396\u5b9a\u662f MySQL \u4e2d\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5c0d\u65bc\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MySQL \u4f3a\u670d\u5668\u7684\u5167\u90e8\u9396\u5b9a\u6a5f\u5236\uff0c\u5305\u62ec\u5176\u5de5\u4f5c\u539f\u7406\u3001\u985e\u578b\u53ca\u5176\u5c0d\u6027\u80fd\u7684\u5f71\u97ff\u3002<\/p>\n<h2 id=\"%e5%85%a7%e9%83%a8%e9%8e%96%e5%ae%9a%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-fRFylWUbCh\">\u5167\u90e8\u9396\u5b9a\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5167\u90e8\u9396\u5b9a\u662f\u6307\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u904e\u7a0b\u4e2d\uff0c\u70ba\u4e86\u9632\u6b62\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u6027\uff0cMySQL \u81ea\u52d5\u5c0d\u67d0\u4e9b\u8cc7\u6e90\u9032\u884c\u9396\u5b9a\u3002\u9019\u4e9b\u8cc7\u6e90\u53ef\u4ee5\u662f\u884c\u3001\u8868\u6216\u6574\u500b\u6578\u64da\u5eab\u3002\u7576\u4e00\u500b\u4e8b\u52d9\u6b63\u5728\u4fee\u6539\u6578\u64da\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u5c07\u7121\u6cd5\u5c0d\u8a72\u6578\u64da\u9032\u884c\u4fee\u6539\uff0c\u76f4\u5230\u8a72\u4e8b\u52d9\u5b8c\u6210\u3002<\/p>\n<h2 id=\"%e9%8e%96%e5%ae%9a%e7%9a%84%e9%a1%9e%e5%9e%8b-fRFylWUbCh\">\u9396\u5b9a\u7684\u985e\u578b<\/h2>\n<p>MySQL \u4e2d\u7684\u9396\u5b9a\u4e3b\u8981\u5206\u70ba\u4ee5\u4e0b\u5e7e\u7a2e\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>\u884c\u9396\uff08Row Lock\uff09<\/strong>: \u9019\u662f\u6700\u7d30\u7c92\u5ea6\u7684\u9396\u5b9a\u65b9\u5f0f\uff0c\u50c5\u9396\u5b9a\u6b63\u5728\u88ab\u4fee\u6539\u7684\u884c\u3002\u884c\u9396\u53ef\u4ee5\u63d0\u9ad8\u4e26\u767c\u6027\uff0c\u56e0\u70ba\u5176\u4ed6\u4e8b\u52d9\u4ecd\u7136\u53ef\u4ee5\u8a2a\u554f\u672a\u88ab\u9396\u5b9a\u7684\u884c\u3002<\/li>\n<li><strong>\u8868\u9396\uff08Table Lock\uff09<\/strong>: \u7576\u4e00\u500b\u4e8b\u52d9\u5c0d\u6574\u500b\u8868\u9032\u884c\u9396\u5b9a\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u5c07\u7121\u6cd5\u8a2a\u554f\u8a72\u8868\u3002\u8868\u9396\u7684\u958b\u92b7\u8f03\u5927\uff0c\u901a\u5e38\u5728\u9700\u8981\u9032\u884c\u5927\u91cf\u8b80\u53d6\u6216\u5beb\u5165\u64cd\u4f5c\u6642\u4f7f\u7528\u3002<\/li>\n<li><strong>\u610f\u5411\u9396\uff08Intent Lock\uff09<\/strong>: \u9019\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u9396\u5b9a\uff0c\u7528\u65bc\u6307\u793a\u4e00\u500b\u4e8b\u52d9\u5c07\u8981\u5c0d\u67d0\u4e9b\u884c\u9032\u884c\u9396\u5b9a\u3002\u610f\u5411\u9396\u53ef\u4ee5\u5e6b\u52a9 MySQL \u78ba\u4fdd\u5728\u884c\u9396\u548c\u8868\u9396\u4e4b\u9593\u7684\u517c\u5bb9\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%8e%96%e5%ae%9a%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-fRFylWUbCh\">\u9396\u5b9a\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>\u7576\u4e00\u500b\u4e8b\u52d9\u958b\u59cb\u57f7\u884c\u6642\uff0cMySQL \u6703\u6839\u64da\u9700\u8981\u81ea\u52d5\u7372\u53d6\u76f8\u61c9\u7684\u9396\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u5728 MySQL \u4e2d\u4f7f\u7528\u9396\u5b9a\uff1a<\/p>\n<pre><code>START TRANSACTION;\nSELECT * FROM users WHERE id = 1 FOR UPDATE;\nUPDATE users SET balance = balance - 100 WHERE id = 1;\nCOMMIT;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7576\u4e8b\u52d9\u57f7\u884c\u5230 <code>SELECT<\/code> \u8a9e\u53e5\u6642\uff0cMySQL \u5c07\u5c0d\u8a72\u884c\u9032\u884c\u9396\u5b9a\uff0c\u9632\u6b62\u5176\u4ed6\u4e8b\u52d9\u540c\u6642\u4fee\u6539\u8a72\u884c\u7684\u6578\u64da\u3002\u53ea\u6709\u7576\u4e8b\u52d9\u63d0\u4ea4\u5f8c\uff0c\u9396\u5b9a\u624d\u6703\u88ab\u91cb\u653e\u3002<\/p>\n<h2 id=\"%e9%8e%96%e5%ae%9a%e7%9a%84%e6%80%a7%e8%83%bd%e5%bd%b1%e9%9f%bf-fRFylWUbCh\">\u9396\u5b9a\u7684\u6027\u80fd\u5f71\u97ff<\/h2>\n<p>\u96d6\u7136\u9396\u5b9a\u5c0d\u65bc\u6578\u64da\u4e00\u81f4\u6027\u81f3\u95dc\u91cd\u8981\uff0c\u4f46\u904e\u5ea6\u7684\u9396\u5b9a\u4e5f\u53ef\u80fd\u5c0e\u81f4\u6027\u80fd\u554f\u984c\u3002\u4f8b\u5982\uff0c\u7576\u4e00\u500b\u4e8b\u52d9\u6301\u6709\u9396\u5b9a\u7684\u6642\u9593\u904e\u9577\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u5c07\u7121\u6cd5\u7372\u53d6\u6240\u9700\u7684\u9396\uff0c\u5f9e\u800c\u5c0e\u81f4\u7b49\u5f85\u548c\u6b7b\u9396\u7684\u60c5\u6cc1\u3002\u70ba\u4e86\u6e1b\u5c11\u9019\u4e9b\u554f\u984c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u76e1\u91cf\u7e2e\u77ed\u4e8b\u52d9\u7684\u57f7\u884c\u6642\u9593\u3002<\/li>\n<li>\u4f7f\u7528\u884c\u9396\u800c\u975e\u8868\u9396\uff0c\u4ee5\u63d0\u9ad8\u4e26\u767c\u6027\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u512a\u5316\u67e5\u8a62\uff0c\u4ee5\u6e1b\u5c11\u9396\u5b9a\u7684\u9700\u6c42\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-fRFylWUbCh\">\u7d50\u8ad6<\/h2>\n<p>MySQL \u4f3a\u670d\u5668\u7684\u5167\u90e8\u9396\u5b9a\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u95dc\u9375\u6a5f\u5236\u3002\u4e86\u89e3\u4e0d\u540c\u985e\u578b\u7684\u9396\u5b9a\u53ca\u5176\u5de5\u4f5c\u539f\u7406\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u8a2d\u8a08\u548c\u512a\u5316\u6578\u64da\u5eab\u61c9\u7528\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u9396\u5b9a\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5728\u4fdd\u8b49\u6578\u64da\u5b89\u5168\u7684\u540c\u6642\uff0c\u63d0\u5347\u7cfb\u7d71\u7684\u6027\u80fd\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 MySQL \u4f3a\u670d\u5668\u7684\u5167\u90e8\u9396\u5b9a\u6a5f\u5236\uff0c\u63d0\u5347\u8cc7\u6599\u5eab\u6548\u80fd\u8207\u5b89\u5168\u6027\uff0c\u907f\u514d\u6b7b\u9396\u8207\u7af6\u722d\u689d\u4ef6\u554f\u984c\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-75974","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75974","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=75974"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75974\/revisions"}],"predecessor-version":[{"id":75975,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75974\/revisions\/75975"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75974"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}