{"id":79704,"date":"2024-10-16T13:28:14","date_gmt":"2024-10-16T05:28:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/79704\/"},"modified":"2024-10-16T13:28:14","modified_gmt":"2024-10-16T05:28:14","slug":"mysql%e6%8c%87%e4%bb%a4-set%ef%bc%88-%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/79704\/","title":{"rendered":"MySQL\u6307\u4ee4: SET\uff08 ** \uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-set%ef%bc%88-%ef%bc%89-kfAdTIbIil\">MySQL\u6307\u4ee4: SET\uff08 ** \uff09<\/h1>\n<p>\u5728MySQL\u4e2d\uff0cSET\u6307\u4ee4\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u547d\u4ee4\uff0c\u4e3b\u8981\u7528\u65bc\u8a2d\u5b9a\u7cfb\u7d71\u8b8a\u6578\u3001\u6703\u8a71\u8b8a\u6578\u4ee5\u53ca\u7528\u6236\u8b8a\u6578\u3002\u9019\u4e9b\u8b8a\u6578\u53ef\u4ee5\u5f71\u97ff\u6578\u64da\u5eab\u7684\u884c\u70ba\u548c\u6027\u80fd\uff0c\u56e0\u6b64\u4e86\u89e3\u5982\u4f55\u4f7f\u7528SET\u6307\u4ee4\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u548c\u958b\u767c\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2 id=\"set%e6%8c%87%e4%bb%a4%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-kfAdTIbIil\">SET\u6307\u4ee4\u7684\u57fa\u672c\u7528\u6cd5<\/h2>\n<p>SET\u6307\u4ee4\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SET [GLOBAL | SESSION] \u8b8a\u6578\u540d = \u503c;<\/code><\/pre>\n<ul>\n<li><strong>GLOBAL<\/strong>: \u8a2d\u5b9a\u5168\u5c40\u8b8a\u6578\uff0c\u5f71\u97ff\u6240\u6709\u9023\u63a5\u3002<\/li>\n<li><strong>SESSION<\/strong>: \u8a2d\u5b9a\u6703\u8a71\u8b8a\u6578\uff0c\u50c5\u5f71\u97ff\u7576\u524d\u9023\u63a5\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u8a2d\u5b9a\u6700\u5927\u9023\u63a5\u6578\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6307\u4ee4\uff1a<\/p>\n<pre><code>SET GLOBAL max_connections = 200;<\/code><\/pre>\n<p>\u9019\u5c07\u5168\u5c40\u6700\u5927\u9023\u63a5\u6578\u8a2d\u7f6e\u70ba200\u3002\u82e5\u53ea\u60f3\u5f71\u97ff\u7576\u524d\u6703\u8a71\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>SET SESSION max_connections = 200;<\/code><\/pre>\n<h2 id=\"%e7%94%a8%e6%88%b6%e8%ae%8a%e6%95%b8%e7%9a%84%e8%a8%ad%e5%ae%9a-kfAdTIbIil\">\u7528\u6236\u8b8a\u6578\u7684\u8a2d\u5b9a<\/h2>\n<p>\u9664\u4e86\u7cfb\u7d71\u8b8a\u6578\u5916\uff0cSET\u6307\u4ee4\u9084\u53ef\u4ee5\u7528\u4f86\u8a2d\u5b9a\u7528\u6236\u8b8a\u6578\u3002\u7528\u6236\u8b8a\u6578\u7684\u547d\u540d\u898f\u5247\u662f\u4ee5@\u7b26\u865f\u958b\u982d\uff0c\u4e26\u4e14\u5728\u7576\u524d\u6703\u8a71\u4e2d\u6709\u6548\u3002\u4ee5\u4e0b\u662f\u8a2d\u5b9a\u7528\u6236\u8b8a\u6578\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>SET @my_variable = 10;<\/code><\/pre>\n<p>\u53ef\u4ee5\u96a8\u5f8c\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u9019\u500b\u8b8a\u6578\uff1a<\/p>\n<pre><code>SELECT @my_variable;<\/code><\/pre>\n<h2 id=\"set%e6%8c%87%e4%bb%a4%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-kfAdTIbIil\">SET\u6307\u4ee4\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>SET\u6307\u4ee4\u7684\u61c9\u7528\u5834\u666f\u975e\u5e38\u5ee3\u6cdb\uff0c\u4ee5\u4e0b\u662f\u5e7e\u500b\u5e38\u898b\u7684\u4f8b\u5b50\uff1a<\/p>\n<ul>\n<li><strong>\u8abf\u6574\u6027\u80fd\u53c3\u6578<\/strong>: \u901a\u904e\u8abf\u6574\u5982<code>innodb_buffer_pool_size<\/code>\u7b49\u53c3\u6578\uff0c\u53ef\u4ee5\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u3002<\/li>\n<li><strong>\u6703\u8a71\u7ba1\u7406<\/strong>: \u5728\u7279\u5b9a\u7684\u6703\u8a71\u4e2d\u8a2d\u5b9a\u8b8a\u6578\uff0c\u4ee5\u4fbf\u9032\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\u6216\u6e2c\u8a66\u3002<\/li>\n<li><strong>\u6578\u64da\u8655\u7406<\/strong>: \u4f7f\u7528\u7528\u6236\u8b8a\u6578\u4f86\u5b58\u5132\u4e2d\u9593\u7d50\u679c\uff0c\u4fbf\u65bc\u5f8c\u7e8c\u67e5\u8a62\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-kfAdTIbIil\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528SET\u6307\u4ee4\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u5168\u5c40\u8b8a\u6578\u7684\u8b8a\u66f4\u6703\u5f71\u97ff\u6240\u6709\u65b0\u9023\u63a5\uff0c\u4f46\u4e0d\u6703\u5f71\u97ff\u5df2\u7d93\u5b58\u5728\u7684\u9023\u63a5\u3002<\/li>\n<li>\u67d0\u4e9b\u8b8a\u6578\u7684\u8b8a\u66f4\u53ef\u80fd\u9700\u8981\u91cd\u555f\u670d\u52d9\u5668\u624d\u80fd\u751f\u6548\u3002<\/li>\n<li>\u4f7f\u7528\u4e0d\u7576\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u6b64\u5728\u8abf\u6574\u8b8a\u6578\u6642\u61c9\u8b39\u614e\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-kfAdTIbIil\">\u7d50\u8ad6<\/h2>\n<p>SET\u6307\u4ee4\u5728MySQL\u4e2d\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u9748\u6d3b\u5730\u7ba1\u7406\u6578\u64da\u5eab\u7684\u884c\u70ba\u548c\u6027\u80fd\u3002\u7121\u8ad6\u662f\u8abf\u6574\u7cfb\u7d71\u53c3\u6578\u9084\u662f\u4f7f\u7528\u7528\u6236\u8b8a\u6578\uff0c\u638c\u63e1SET\u6307\u4ee4\u7684\u7528\u6cd5\u90fd\u80fd\u63d0\u9ad8\u6578\u64da\u5eab\u7ba1\u7406\u7684\u6548\u7387\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u60a8\u7684\u74b0\u5883\u4e2d\u4f7f\u7528MySQL\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>\u4e86\u89e3MySQL\u6307\u4ee4SET\u7684\u7528\u6cd5\uff0c\u638c\u63e1\u5982\u4f55\u8bbe\u7f6e\u7cfb\u7edf\u53d8\u91cf\u548c\u4f1a\u8bdd\u53c2\u6570\uff0c\u4f18\u5316\u6570\u636e\u5e93\u6027\u80fd\u4e0e\u914d\u7f6e\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-79704","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79704","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=79704"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79704\/revisions"}],"predecessor-version":[{"id":79705,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79704\/revisions\/79705"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=79704"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=79704"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=79704"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}