{"id":75274,"date":"2024-10-15T23:27:24","date_gmt":"2024-10-15T15:27:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75274\/"},"modified":"2024-10-15T23:27:24","modified_gmt":"2024-10-15T15:27:24","slug":"mysql-%e4%bc%ba%e6%9c%8d%e5%99%a8%e5%af%a6%e6%96%bd%e8%aa%bf%e5%84%aa%e7%9a%843%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75274\/","title":{"rendered":"MySQL \u4f3a\u670d\u5668\u5be6\u65bd\u8abf\u512a\u76843\u65b9\u6848"},"content":{"rendered":"<h1 id=\"mysql-%e4%bc%ba%e6%9c%8d%e5%99%a8%e5%af%a6%e6%96%bd%e8%aa%bf%e5%84%aa%e7%9a%843%e6%96%b9%e6%a1%88-rEcmBdUFvM\">MySQL \u4f3a\u670d\u5668\u5be6\u65bd\u8abf\u512a\u76843\u65b9\u6848<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0cMySQL \u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u5982\u4f55\u6709\u6548\u5730\u8abf\u512a MySQL \u4f3a\u670d\u5668\u4ee5\u63d0\u9ad8\u6027\u80fd\u6210\u70ba\u4e86\u8a31\u591a\u958b\u767c\u8005\u548c\u7cfb\u7d71\u7ba1\u7406\u54e1\u9762\u81e8\u7684\u91cd\u8981\u6311\u6230\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e09\u7a2e\u6709\u6548\u7684 MySQL \u4f3a\u670d\u5668\u8abf\u512a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u63d0\u5347\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002<\/p>\n<h2 id=\"1-%e8%aa%bf%e6%95%b4%e9%85%8d%e7%bd%ae%e5%8f%83%e6%95%b8-rEcmBdUFvM\">1. \u8abf\u6574\u914d\u7f6e\u53c3\u6578<\/h2>\n<p>MySQL \u7684\u6027\u80fd\u5728\u5f88\u5927\u7a0b\u5ea6\u4e0a\u53d6\u6c7a\u65bc\u5176\u914d\u7f6e\u53c3\u6578\u3002\u6839\u64da\u61c9\u7528\u7684\u9700\u6c42\uff0c\u8abf\u6574\u9019\u4e9b\u53c3\u6578\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u95dc\u9375\u7684\u914d\u7f6e\u53c3\u6578\uff1a<\/p>\n<ul>\n<li><code>innodb_buffer_pool_size<\/code>: \u9019\u662f InnoDB \u5b58\u5132\u5f15\u64ce\u7528\u4f86\u7de9\u5b58\u6578\u64da\u548c\u7d22\u5f15\u7684\u5167\u5b58\u5340\u57df\u3002\u901a\u5e38\u5efa\u8b70\u5c07\u5176\u8a2d\u7f6e\u70ba\u53ef\u7528\u5167\u5b58\u7684 70-80%\u3002<\/li>\n<li><code>max_connections<\/code>: \u6b64\u53c3\u6578\u5b9a\u7fa9\u4e86\u540c\u6642\u9023\u63a5\u5230 MySQL \u4f3a\u670d\u5668\u7684\u6700\u5927\u5ba2\u6236\u7aef\u6578\u91cf\u3002\u6839\u64da\u61c9\u7528\u7684\u9700\u6c42\u9032\u884c\u8abf\u6574\uff0c\u4ee5\u907f\u514d\u9023\u63a5\u904e\u591a\u5c0e\u81f4\u7684\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<li><code>query_cache_size<\/code>: \u555f\u7528\u67e5\u8a62\u7de9\u5b58\u53ef\u4ee5\u52a0\u901f\u91cd\u8907\u67e5\u8a62\u7684\u97ff\u61c9\u6642\u9593\u3002\u6839\u64da\u61c9\u7528\u7684\u67e5\u8a62\u6a21\u5f0f\uff0c\u9069\u7576\u8a2d\u7f6e\u6b64\u53c3\u6578\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p>\u8abf\u6574\u9019\u4e9b\u53c3\u6578\u5f8c\uff0c\u5efa\u8b70\u4f7f\u7528 <code>SHOW VARIABLES<\/code> \u547d\u4ee4\u4f86\u6aa2\u67e5\u7576\u524d\u7684\u914d\u7f6e\uff0c\u4e26\u4f7f\u7528 <code>SHOW STATUS<\/code> \u4f86\u76e3\u63a7\u6027\u80fd\u6307\u6a19\u3002<\/p>\n<h2 id=\"2-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-rEcmBdUFvM\">2. \u512a\u5316\u67e5\u8a62\u6027\u80fd<\/h2>\n<p>\u67e5\u8a62\u6027\u80fd\u7684\u512a\u5316\u662f\u63d0\u5347 MySQL \u6574\u9ad4\u6027\u80fd\u7684\u53e6\u4e00\u500b\u91cd\u8981\u65b9\u9762\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u67e5\u8a62\u7684\u7b56\u7565\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u7d22\u5f15<\/strong>: \u70ba\u5e38\u7528\u7684\u67e5\u8a62\u5b57\u6bb5\u5275\u5efa\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002\u4f7f\u7528 <code>EXPLAIN<\/code> \u547d\u4ee4\u4f86\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0c\u78ba\u4fdd\u7d22\u5f15\u7684\u6709\u6548\u6027\u3002<\/li>\n<li><strong>\u907f\u514d SELECT *<\/strong>: \u53ea\u9078\u64c7\u9700\u8981\u7684\u5b57\u6bb5\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u7684\u8ca0\u64d4\u3002<\/li>\n<li><strong>\u4f7f\u7528 JOIN \u800c\u975e\u5b50\u67e5\u8a62<\/strong>: \u5728\u8a31\u591a\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528 JOIN \u4f86\u9023\u63a5\u8868\u6bd4\u4f7f\u7528\u5b50\u67e5\u8a62\u66f4\u9ad8\u6548\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u662f\u4f7f\u7528 JOIN \u7684\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT a.name, b.order_date \nFROM customers a \nJOIN orders b ON a.id = b.customer_id \nWHERE b.status = 'shipped';<\/code><\/pre>\n<h2 id=\"3-%e5%ae%9a%e6%9c%9f%e7%b6%ad%e8%ad%b7%e6%95%b8%e6%93%9a%e5%ba%ab-rEcmBdUFvM\">3. \u5b9a\u671f\u7dad\u8b77\u6578\u64da\u5eab<\/h2>\n<p>\u5b9a\u671f\u7684\u6578\u64da\u5eab\u7dad\u8b77\u5c0d\u65bc\u4fdd\u6301 MySQL \u7684\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\u7684\u7dad\u8b77\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li><strong>\u6e05\u7406\u904e\u671f\u6578\u64da<\/strong>: \u5b9a\u671f\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u6578\u64da\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u5eab\u7684\u5927\u5c0f\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u91cd\u5efa\u7d22\u5f15<\/strong>: \u96a8\u8457\u6578\u64da\u7684\u589e\u9577\uff0c\u7d22\u5f15\u53ef\u80fd\u6703\u8b8a\u5f97\u4e0d\u518d\u9ad8\u6548\u3002\u5b9a\u671f\u91cd\u5efa\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u4f7f\u7528 <code>OPTIMIZE TABLE<\/code><\/strong>: \u6b64\u547d\u4ee4\u53ef\u4ee5\u56de\u6536\u672a\u4f7f\u7528\u7684\u7a7a\u9593\uff0c\u4e26\u91cd\u65b0\u7d44\u7e54\u8868\u7684\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u512a\u5316\u4e00\u500b\u8868\uff1a<\/p>\n<pre><code>OPTIMIZE TABLE orders;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-rEcmBdUFvM\">\u7e3d\u7d50<\/h2>\n<p>\u901a\u904e\u8abf\u6574\u914d\u7f6e\u53c3\u6578\u3001\u512a\u5316\u67e5\u8a62\u6027\u80fd\u548c\u5b9a\u671f\u7dad\u8b77\u6578\u64da\u5eab\uff0c\u60a8\u53ef\u4ee5\u986f\u8457\u63d0\u5347 MySQL \u4f3a\u670d\u5668\u7684\u6027\u80fd\u3002\u9019\u4e9b\u65b9\u6848\u4e0d\u50c5\u80fd\u5e6b\u52a9\u60a8\u89e3\u6c7a\u7576\u524d\u7684\u6027\u80fd\u74f6\u9838\uff0c\u9084\u80fd\u70ba\u672a\u4f86\u7684\u64f4\u5c55\u6253\u4e0b\u826f\u597d\u7684\u57fa\u790e\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\uff0c\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u548c\u512a\u5316\u60a8\u7684 MySQL \u4f3a\u670d\u5668\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u4e09\u7a2e\u6709\u6548\u7684MySQL\u4f3a\u670d\u5668\u5be6\u65bd\u8abf\u512a\u65b9\u6848\uff0c\u63d0\u5347\u6027\u80fd\u3001\u52a0\u901f\u67e5\u8a62\u4e26\u512a\u5316\u8cc7\u6e90\u4f7f\u7528\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-75274","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75274","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=75274"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75274\/revisions"}],"predecessor-version":[{"id":75275,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75274\/revisions\/75275"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75274"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}