{"id":152737,"date":"2024-11-02T01:36:20","date_gmt":"2024-11-01T17:36:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/152737\/"},"modified":"2024-11-02T01:36:22","modified_gmt":"2024-11-01T17:36:22","slug":"%e5%b8%b8%e8%a6%8b%e9%8e%96%e9%a1%9e%e5%9e%8b%e5%8f%8a%e5%85%b6%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%87%89%e7%94%a8-%e9%8e%96%e9%a1%9e%e5%9e%8b-%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/152737\/","title":{"rendered":"\u5e38\u898b\u9396\u985e\u578b\u53ca\u5176\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528 (\u9396\u985e\u578b \u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e5%b8%b8%e8%a6%8b%e9%8e%96%e9%a1%9e%e5%9e%8b%e5%8f%8a%e5%85%b6%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84%e6%87%89%e7%94%a8-nlTgXlcqog\">\u5e38\u898b\u9396\u985e\u578b\u53ca\u5176\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u9396\u662f\u7528\u4f86\u63a7\u5236\u5c0d\u6578\u64da\u7684\u8a2a\u554f\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u96a8\u8457\u591a\u7528\u6236\u74b0\u5883\u7684\u666e\u53ca\uff0c\u9396\u7684\u4f7f\u7528\u8b8a\u5f97\u5c24\u70ba\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5e7e\u7a2e\u5e38\u898b\u7684\u9396\u985e\u578b\u53ca\u5176\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528\u3002<\/p>\n<h2 id=\"1-%e9%8e%96%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-nlTgXlcqog\">1. \u9396\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u9396\u662f\u4e00\u7a2e\u6a5f\u5236\uff0c\u7528\u65bc\u9632\u6b62\u591a\u500b\u7528\u6236\u540c\u6642\u4fee\u6539\u540c\u4e00\u6578\u64da\uff0c\u5f9e\u800c\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002\u9396\u7684\u4e3b\u8981\u76ee\u7684\u662f\u4fdd\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u4e26\u78ba\u4fdd\u4e8b\u52d9\u7684\u539f\u5b50\u6027\u3002\u6839\u64da\u9396\u7684\u7bc4\u570d\u548c\u6301\u6709\u65b9\u5f0f\uff0c\u9396\u53ef\u4ee5\u5206\u70ba\u591a\u7a2e\u985e\u578b\u3002<\/p>\n<h2 id=\"2-%e5%b8%b8%e8%a6%8b%e7%9a%84%e9%8e%96%e9%a1%9e%e5%9e%8b-nlTgXlcqog\">2. \u5e38\u898b\u7684\u9396\u985e\u578b<\/h2>\n<h3 id=\"2-1-%e6%8e%92%e4%bb%96%e9%8e%96%ef%bc%88exclusive-lock%ef%bc%89-nlTgXlcqog\">2.1 \u6392\u4ed6\u9396\uff08Exclusive Lock\uff09<\/h3>\n<p>\u6392\u4ed6\u9396\u662f\u6700\u56b4\u683c\u7684\u9396\u985e\u578b\uff0c\u7576\u4e00\u500b\u4e8b\u52d9\u7372\u5f97\u6392\u4ed6\u9396\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u5c0d\u8a72\u6578\u64da\u9032\u884c\u4efb\u4f55\u64cd\u4f5c\u3002\u9019\u7a2e\u9396\u901a\u5e38\u7528\u65bc\u9700\u8981\u4fee\u6539\u6578\u64da\u7684\u60c5\u6cc1\u3002\u4f8b\u5982\uff0c\u5728\u66f4\u65b0\u4e00\u689d\u8a18\u9304\u6642\uff0c\u6578\u64da\u5eab\u6703\u81ea\u52d5\u70ba\u8a72\u8a18\u9304\u52a0\u4e0a\u6392\u4ed6\u9396\uff0c\u76f4\u5230\u4e8b\u52d9\u5b8c\u6210\u3002<\/p>\n<pre><code>BEGIN TRANSACTION;\nSELECT * FROM users WHERE id = 1 FOR UPDATE; -- \u7372\u53d6\u6392\u4ed6\u9396\nUPDATE users SET name = '\u65b0\u540d\u5b57' WHERE id = 1;\nCOMMIT;<\/code><\/pre>\n<h3 id=\"2-2-%e5%85%b1%e4%ba%ab%e9%8e%96%ef%bc%88shared-lock%ef%bc%89-nlTgXlcqog\">2.2 \u5171\u4eab\u9396\uff08Shared Lock\uff09<\/h3>\n<p>\u5171\u4eab\u9396\u5141\u8a31\u591a\u500b\u4e8b\u52d9\u540c\u6642\u8b80\u53d6\u6578\u64da\uff0c\u4f46\u4e0d\u5141\u8a31\u4efb\u4f55\u4e8b\u52d9\u4fee\u6539\u8a72\u6578\u64da\u3002\u9019\u7a2e\u9396\u9069\u7528\u65bc\u8b80\u53d6\u64cd\u4f5c\uff0c\u78ba\u4fdd\u5728\u8b80\u53d6\u904e\u7a0b\u4e2d\u6578\u64da\u4e0d\u6703\u88ab\u4fee\u6539\u3002\u4f8b\u5982\uff0c\u5728\u67e5\u8a62\u6578\u64da\u6642\uff0c\u6578\u64da\u5eab\u6703\u70ba\u8a72\u6578\u64da\u52a0\u4e0a\u5171\u4eab\u9396\u3002<\/p>\n<pre><code>BEGIN TRANSACTION;\nSELECT * FROM users WHERE id = 1; -- \u7372\u53d6\u5171\u4eab\u9396\nCOMMIT;<\/code><\/pre>\n<h3 id=\"2-3-%e6%84%8f%e5%90%91%e9%8e%96%ef%bc%88intent-lock%ef%bc%89-nlTgXlcqog\">2.3 \u610f\u5411\u9396\uff08Intent Lock\uff09<\/h3>\n<p>\u610f\u5411\u9396\u662f\u4e00\u7a2e\u7528\u65bc\u8868\u7d1a\u9396\u7684\u6a5f\u5236\uff0c\u4e3b\u8981\u7528\u65bc\u6307\u793a\u67d0\u500b\u4e8b\u52d9\u6253\u7b97\u5728\u66f4\u7d30\u7c92\u5ea6\u7684\u884c\u4e0a\u7372\u53d6\u9396\u3002\u610f\u5411\u9396\u5206\u70ba\u610f\u5411\u5171\u4eab\u9396\uff08IS\uff09\u548c\u610f\u5411\u6392\u4ed6\u9396\uff08IX\uff09\u3002\u9019\u7a2e\u9396\u7684\u4e3b\u8981\u76ee\u7684\u662f\u63d0\u9ad8\u9396\u7684\u6548\u7387\uff0c\u907f\u514d\u6b7b\u9396\u7684\u767c\u751f\u3002<\/p>\n<pre><code>BEGIN TRANSACTION;\nSELECT * FROM users WHERE id = 1; -- \u7372\u53d6\u610f\u5411\u5171\u4eab\u9396\nUPDATE users SET name = '\u65b0\u540d\u5b57' WHERE id = 1; -- \u7372\u53d6\u610f\u5411\u6392\u4ed6\u9396\nCOMMIT;<\/code><\/pre>\n<h3 id=\"2-4-%e8%87%aa%e5%8b%95%e9%8e%96%ef%bc%88automatic-lock%ef%bc%89-nlTgXlcqog\">2.4 \u81ea\u52d5\u9396\uff08Automatic Lock\uff09<\/h3>\n<p>\u81ea\u52d5\u9396\u662f\u6578\u64da\u5eab\u7cfb\u7d71\u81ea\u52d5\u7ba1\u7406\u7684\u9396\uff0c\u901a\u5e38\u5728\u4e8b\u52d9\u958b\u59cb\u6642\u81ea\u52d5\u7372\u53d6\uff0c\u4e26\u5728\u4e8b\u52d9\u7d50\u675f\u6642\u81ea\u52d5\u91cb\u653e\u3002\u9019\u7a2e\u9396\u7684\u4f7f\u7528\u7c21\u5316\u4e86\u958b\u767c\u8005\u7684\u5de5\u4f5c\uff0c\u56e0\u70ba\u958b\u767c\u8005\u4e0d\u9700\u8981\u624b\u52d5\u7ba1\u7406\u9396\u7684\u7372\u53d6\u548c\u91cb\u653e\u3002<\/p>\n<h2 id=\"3-%e9%8e%96%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-nlTgXlcqog\">3. \u9396\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u9396\u7684\u9078\u64c7\u53d6\u6c7a\u65bc\u5177\u9ad4\u7684\u696d\u52d9\u9700\u6c42\u3002\u4f8b\u5982\uff0c\u5728\u9ad8\u4e26\u767c\u7684\u74b0\u5883\u4e2d\uff0c\u4f7f\u7528\u5171\u4eab\u9396\u53ef\u4ee5\u63d0\u9ad8\u8b80\u53d6\u6548\u7387\uff0c\u800c\u5728\u9700\u8981\u4fee\u6539\u6578\u64da\u7684\u60c5\u6cc1\u4e0b\uff0c\u5247\u5fc5\u9808\u4f7f\u7528\u6392\u4ed6\u9396\u3002\u6b64\u5916\uff0c\u610f\u5411\u9396\u7684\u4f7f\u7528\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u6b7b\u9396\u7684\u98a8\u96aa\uff0c\u5f9e\u800c\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n<h2 id=\"4-%e9%8e%96%e7%9a%84%e7%ae%a1%e7%90%86%e8%88%87%e5%84%aa%e5%8c%96-nlTgXlcqog\">4. \u9396\u7684\u7ba1\u7406\u8207\u512a\u5316<\/h2>\n<p>\u70ba\u4e86\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u7ba1\u7406\u548c\u512a\u5316\u9396\u7684\u4f7f\u7528\u81f3\u95dc\u91cd\u8981\u3002\u958b\u767c\u8005\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u5f0f\u4f86\u512a\u5316\u9396\u7684\u4f7f\u7528\uff1a<\/p>\n<ul>\n<li>\u6e1b\u5c11\u4e8b\u52d9\u7684\u6301\u7e8c\u6642\u9593\uff0c\u53ca\u6642\u91cb\u653e\u9396\u3002<\/li>\n<li>\u4f7f\u7528\u5408\u9069\u7684\u9396\u985e\u578b\uff0c\u6839\u64da\u64cd\u4f5c\u7684\u6027\u8cea\u9078\u64c7\u5171\u4eab\u9396\u6216\u6392\u4ed6\u9396\u3002<\/li>\n<li>\u907f\u514d\u9577\u6642\u9593\u6301\u6709\u9396\uff0c\u7279\u5225\u662f\u5728\u9ad8\u4e26\u767c\u7684\u74b0\u5883\u4e2d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-nlTgXlcqog\">\u7e3d\u7d50<\/h2>\n<p>\u9396\u5728\u6578\u64da\u5eab\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u6b63\u78ba\u7684\u9396\u7ba1\u7406\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u4e86\u89e3\u4e0d\u540c\u985e\u578b\u7684\u9396\u53ca\u5176\u61c9\u7528\u5834\u666f\uff0c\u5c0d\u65bc\u958b\u767c\u8005\u4f86\u8aaa\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u60a8\u7684\u61c9\u7528\u4e2d\u6709\u6548\u4f7f\u7528\u9396\uff0c\u6216\u5c0b\u627e\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5e38\u898b\u9396\u985e\u578b\u53ca\u5176\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528\uff0c\u4e86\u89e3\u5982\u4f55\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u5b89\u5168\u6027\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-152737","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152737","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=152737"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152737\/revisions"}],"predecessor-version":[{"id":152738,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152737\/revisions\/152738"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=152737"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=152737"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=152737"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}