{"id":187202,"date":"2024-11-11T12:18:22","date_gmt":"2024-11-11T04:18:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187202\/"},"modified":"2024-11-11T12:18:24","modified_gmt":"2024-11-11T04:18:24","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%e9%8e%96%e7%9a%84%e6%ad%a3%e7%a2%ba%e5%af%ab%e6%b3%95-%e6%95%b8%e6%93%9a%e5%ba%ab-%e4%ba%8b%e5%8b%99%e9%8e%96%e5%af%ab%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187202\/","title":{"rendered":"\u6578\u64da\u5eab\u4e8b\u52d9\u9396\u7684\u6b63\u78ba\u5beb\u6cd5 (\u6578\u64da\u5eab \u4e8b\u52d9\u9396\u5beb\u6cd5)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%e9%8e%96%e7%9a%84%e6%ad%a3%e7%a2%ba%e5%af%ab%e6%b3%95-yRocCQTBKr\">\u6578\u64da\u5eab\u4e8b\u52d9\u9396\u7684\u6b63\u78ba\u5beb\u6cd5<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u4e8b\u52d9\u9396\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u91cd\u8981\u6a5f\u5236\u3002\u7576\u591a\u500b\u7528\u6236\u6216\u61c9\u7528\u7a0b\u5e8f\u540c\u6642\u8a2a\u554f\u6578\u64da\u6642\uff0c\u4e8b\u52d9\u9396\u80fd\u5920\u9632\u6b62\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u767c\u751f\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6578\u64da\u5eab\u4e8b\u52d9\u9396\u7684\u6b63\u78ba\u5beb\u6cd5\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e4%ba%8b%e5%8b%99%e9%8e%96%ef%bc%9f-yRocCQTBKr\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u4e8b\u52d9\u9396\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u4e8b\u52d9\u9396\u662f\u4e00\u7a2e\u6a5f\u5236\uff0c\u7528\u65bc\u63a7\u5236\u5c0d\u6578\u64da\u7684\u8a2a\u554f\uff0c\u4ee5\u78ba\u4fdd\u5728\u4e8b\u52d9\u57f7\u884c\u904e\u7a0b\u4e2d\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002\u7576\u4e00\u500b\u4e8b\u52d9\u6b63\u5728\u57f7\u884c\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u5c0d\u540c\u4e00\u6578\u64da\u7684\u8a2a\u554f\u6703\u53d7\u5230\u9650\u5236\uff0c\u9019\u6a23\u53ef\u4ee5\u9632\u6b62\u6578\u64da\u7684\u8b80\u53d6\u6216\u5beb\u5165\u64cd\u4f5c\u4e92\u76f8\u5e72\u64fe\u3002<\/p>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e9%8e%96%e7%9a%84%e9%a1%9e%e5%9e%8b-yRocCQTBKr\">\u4e8b\u52d9\u9396\u7684\u985e\u578b<\/h2>\n<p>\u4e8b\u52d9\u9396\u4e3b\u8981\u5206\u70ba\u4ee5\u4e0b\u5e7e\u7a2e\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>\u5171\u4eab\u9396\uff08Shared Lock\uff09<\/strong>\uff1a\u5141\u8a31\u591a\u500b\u4e8b\u52d9\u540c\u6642\u8b80\u53d6\u6578\u64da\uff0c\u4f46\u4e0d\u5141\u8a31\u5beb\u5165\u3002<\/li>\n<li><strong>\u6392\u4ed6\u9396\uff08Exclusive Lock\uff09<\/strong>\uff1a\u53ea\u5141\u8a31\u4e00\u500b\u4e8b\u52d9\u5c0d\u6578\u64da\u9032\u884c\u8b80\u53d6\u548c\u5beb\u5165\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u8a2a\u554f\u3002<\/li>\n<li><strong>\u610f\u5411\u9396\uff08Intent Lock\uff09<\/strong>\uff1a\u7528\u65bc\u8868\u660e\u4e00\u500b\u4e8b\u52d9\u5e0c\u671b\u5728\u66f4\u4f4e\u5c64\u7d1a\u4e0a\u7372\u5f97\u9396\u7684\u610f\u5716\uff0c\u901a\u5e38\u7528\u65bc\u591a\u5c64\u7d1a\u7684\u9396\u5b9a\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%ba%8b%e5%8b%99%e9%8e%96%e7%9a%84%e6%ad%a3%e7%a2%ba%e5%af%ab%e6%b3%95-yRocCQTBKr\">\u4e8b\u52d9\u9396\u7684\u6b63\u78ba\u5beb\u6cd5<\/h2>\n<p>\u5728\u5be6\u969b\u958b\u767c\u4e2d\uff0c\u6b63\u78ba\u4f7f\u7528\u4e8b\u52d9\u9396\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u6578\u64da\u5eab\u7cfb\u7d71\uff08\u5982 MySQL \u548c PostgreSQL\uff09\u4e2d\u4e8b\u52d9\u9396\u7684\u5beb\u6cd5\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"mysql-%e4%b8%ad%e7%9a%84%e4%ba%8b%e5%8b%99%e9%8e%96-yRocCQTBKr\">MySQL \u4e2d\u7684\u4e8b\u52d9\u9396<\/h3>\n<pre><code>START TRANSACTION;  -- \u958b\u59cb\u4e8b\u52d9\nSELECT * FROM users WHERE id = 1 LOCK IN SHARE MODE;  -- \u7372\u53d6\u5171\u4eab\u9396\n-- \u9032\u884c\u8b80\u53d6\u64cd\u4f5c\nCOMMIT;  -- \u63d0\u4ea4\u4e8b\u52d9\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u958b\u59cb\u4e00\u500b\u4e8b\u52d9\uff0c\u7136\u5f8c\u5c0d\u7528\u6236\u8868\u4e2d\u7684\u4e00\u689d\u8a18\u9304\u7372\u53d6\u5171\u4eab\u9396\uff0c\u9019\u6a23\u5176\u4ed6\u4e8b\u52d9\u53ef\u4ee5\u8b80\u53d6\u8a72\u8a18\u9304\uff0c\u4f46\u7121\u6cd5\u9032\u884c\u5beb\u5165\u64cd\u4f5c\u3002\u6700\u5f8c\uff0c\u6211\u5011\u63d0\u4ea4\u4e8b\u52d9\u4ee5\u91cb\u653e\u9396\u3002<\/p>\n<h3 id=\"postgresql-%e4%b8%ad%e7%9a%84%e4%ba%8b%e5%8b%99%e9%8e%96-yRocCQTBKr\">PostgreSQL \u4e2d\u7684\u4e8b\u52d9\u9396<\/h3>\n<pre><code>BEGIN;  -- \u958b\u59cb\u4e8b\u52d9\nSELECT * FROM users WHERE id = 1 FOR SHARE;  -- \u7372\u53d6\u5171\u4eab\u9396\n-- \u9032\u884c\u8b80\u53d6\u64cd\u4f5c\nCOMMIT;  -- \u63d0\u4ea4\u4e8b\u52d9\n<\/code><\/pre>\n<p>\u5728 PostgreSQL \u4e2d\uff0c\u6211\u5011\u4f7f\u7528 `FOR SHARE` \u4f86\u7372\u53d6\u5171\u4eab\u9396\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u4e8b\u52d9\u57f7\u884c\u671f\u9593\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-yRocCQTBKr\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u4f7f\u7528\u4e8b\u52d9\u9396\u6642\uff0c\u9075\u5faa\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\u53ef\u4ee5\u5e6b\u52a9\u63d0\u9ad8\u7cfb\u7d71\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u76e1\u91cf\u7e2e\u77ed\u9396\u5b9a\u6642\u9593<\/strong>\uff1a\u5728\u4e8b\u52d9\u4e2d\u57f7\u884c\u7684\u64cd\u4f5c\u8d8a\u5c11\uff0c\u6301\u6709\u9396\u7684\u6642\u9593\u5c31\u8d8a\u77ed\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u5176\u4ed6\u4e8b\u52d9\u7684\u7b49\u5f85\u6642\u9593\u3002<\/li>\n<li><strong>\u907f\u514d\u6b7b\u9396<\/strong>\uff1a\u8a2d\u8a08\u4e8b\u52d9\u6642\uff0c\u61c9\u907f\u514d\u540c\u6642\u7372\u53d6\u591a\u500b\u9396\uff0c\u9019\u6a23\u53ef\u4ee5\u964d\u4f4e\u6b7b\u9396\u7684\u98a8\u96aa\u3002<\/li>\n<li><strong>\u4f7f\u7528\u9069\u7576\u7684\u9396\u985e\u578b<\/strong>\uff1a\u6839\u64da\u5be6\u969b\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u9396\u985e\u578b\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6392\u4ed6\u9396\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-yRocCQTBKr\">\u7e3d\u7d50<\/h2>\n<p>\u6578\u64da\u5eab\u4e8b\u52d9\u9396\u662f\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u91cd\u8981\u5de5\u5177\u3002\u6b63\u78ba\u7684\u5beb\u6cd5\u548c\u4f7f\u7528\u65b9\u6cd5\u80fd\u5920\u6709\u6548\u5730\u9632\u6b62\u6578\u64da\u7af6\u722d\u548c\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u767c\u751f\u3002\u5728\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u6642\uff0c\u4e86\u89e3\u6578\u64da\u5eab\u4e8b\u52d9\u9396\u7684\u904b\u4f5c\u539f\u7406\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002\u7121\u8ad6\u662f\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u638c\u63e1\u9019\u4e9b\u77e5\u8b58\u90fd\u662f\u958b\u767c\u8005\u5fc5\u5099\u7684\u6280\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u6578\u64da\u5eab\u4e8b\u52d9\u9396\u7684\u6b63\u78ba\u5beb\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u4e00\u81f4\u6027\u8207\u4e26\u767c\u6027\u80fd\uff0c\u78ba\u4fdd\u8cc7\u6599\u5b89\u5168\u8207\u9ad8\u6548\u8655\u7406\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-187202","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187202","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=187202"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187202\/revisions"}],"predecessor-version":[{"id":187203,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187202\/revisions\/187203"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}