{"id":78098,"date":"2026-02-26T07:35:23","date_gmt":"2026-02-25T23:35:23","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/78098.html"},"modified":"2026-02-26T07:35:23","modified_gmt":"2026-02-25T23:35:23","slug":"%e4%bb%8emysql%e6%85%a2%e6%9f%a5%e8%af%a2%e5%88%b0%e7%bc%93%e5%ad%98%e4%bc%98%e5%8c%96%ef%bc%9a%e4%b8%80%e6%ac%a1%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%8e%8b%e5%8a%9b%e6%b5%8b%e8%af%95%e6%9a%b4%e9%9c%b2","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/78098.html","title":{"rendered":"\u4eceMySQL\u6162\u67e5\u8be2\u5230\u7f13\u5b58\u4f18\u5316\uff1a\u4e00\u6b21\u670d\u52a1\u5668\u538b\u529b\u6d4b\u8bd5\u66b4\u9732\u7684\u6570\u636e\u5e93\u6027\u80fd\u95ee\u9898\u590d\u76d8"},"content":{"rendered":"<h2>\u4eceMySQL\u6162\u67e5\u8be2\u5230\u7f13\u5b58\u4f18\u5316&#xff1a;\u4e00\u6b21\u7535\u5546\u5927\u4fc3\u524d\u7684\u6570\u636e\u5e93\u6027\u80fd\u7a81\u56f4\u6218<\/h2>\n<p>\u51cc\u6668\u4e09\u70b9\u7684\u544a\u8b66\u77ed\u4fe1\u60ca\u9192\u6574\u4e2a\u6280\u672f\u56e2\u961f\u2014\u2014\u538b\u529b\u6d4b\u8bd5\u4e2d\u6570\u636e\u5e93\u670d\u52a1\u5668CPU\u98d9\u5347\u81f398%&#xff0c;\u54cd\u5e94\u65f6\u95f4\u7a81\u78345\u79d2\u7ea2\u7ebf\u3002\u8fd9\u573a\u610f\u5916\u66b4\u9732\u7684\u6027\u80fd\u5371\u673a&#xff0c;\u53cd\u800c\u6210\u4e3a\u6211\u4eec\u7cfb\u7edf\u4f18\u5316\u7684\u8f6c\u6298\u70b9\u3002\u672c\u6587\u5c06\u8fd8\u539f\u4ece\u6162\u67e5\u8be2\u5b9a\u4f4d\u5230\u7f13\u5b58\u67b6\u6784\u5347\u7ea7\u7684\u5168\u94fe\u8def\u5b9e\u6218&#xff0c;\u7279\u522b\u63ed\u793aORM\u6846\u67b6\u4e2d\u9690\u85cf\u7684&#034;N&#043;1\u67e5\u8be2&#034;\u9677\u9631\u53ca\u5176\u7834\u89e3\u4e4b\u9053\u3002<\/p>\n<h3>1. \u538b\u529b\u6d4b\u8bd5\u4e2d\u7684\u6027\u80fd\u5371\u673a&#xff1a;\u73b0\u8c61\u4e0e\u5b9a\u4f4d<\/h3>\n<p>\u5f53\u6a21\u62df5000\u5e76\u53d1\u7528\u6237\u51b2\u51fb\u7535\u5546\u7cfb\u7edf\u65f6&#xff0c;\u76d1\u63a7\u5927\u5c4f\u7a81\u7136\u4eae\u8d77\u7ea2\u8272\u8b66\u62a5\u3002\u6570\u636e\u5e93\u670d\u52a1\u5668\u6307\u6807\u5168\u7ebf\u98d8\u7ea2&#xff1a;<\/p>\n<ul>\n<li>CPU\u5229\u7528\u7387\u4ece30%\u98d9\u5347\u81f398%\u5e76\u6301\u7eed\u9ad8\u4f4d\u9707\u8361<\/li>\n<li>\u5185\u5b58\u4f7f\u7528\u7387\u7a81\u783485%\u8b66\u6212\u7ebf<\/li>\n<li>\u78c1\u76d8I\/O\u7b49\u5f85\u65f6\u95f4\u8d85\u8fc7200ms<\/li>\n<\/ul>\n<p>\u901a\u8fc7show processlist\u6293\u53d6\u5b9e\u65f6\u67e5\u8be2&#xff0c;\u53d1\u73b0\u5927\u91cf\u76f8\u4f3cSQL\u8bed\u53e5\u5806\u79ef&#xff1a;<\/p>\n<p>SELECT * FROM order_items WHERE order_id &#061; 12345;<br \/>\nSELECT * FROM order_items WHERE order_id &#061; 67890;<br \/>\n&#8230;<\/p>\n<p>\u66f4\u53ef\u7591\u7684\u662f\u8fd9\u4e9b\u67e5\u8be2\u5e73\u5747\u6267\u884c\u65f6\u95f4\u8fbe800ms&#xff0c;\u800c\u8ba2\u5355\u8868\u6570\u636e\u91cf\u4e0d\u8fc7\u767e\u4e07\u7ea7\u522b\u3002\u6211\u4eec\u7acb\u5373\u9501\u5b9a\u4e24\u4e2a\u5173\u952e\u95ee\u9898&#xff1a;<\/p>\n<li>\u5faa\u73af\u67e5\u8be2\u9677\u9631&#xff1a;\u5e94\u7528\u5c42\u5728\u904d\u5386\u8ba2\u5355\u5217\u8868\u65f6&#xff0c;\u5bf9\u6bcf\u4e2a\u8ba2\u5355\u5355\u72ec\u67e5\u8be2\u5173\u8054\u5546\u54c1<\/li>\n<li>\u7d22\u5f15\u7f3a\u5931&#xff1a;order_items\u8868\u7684order_id\u5b57\u6bb5\u672a\u5efa\u7acb\u5916\u952e\u7d22\u5f15<\/li>\n<p>\u5b9e\u6218\u6280\u5de7&#xff1a;show engine innodb status\u53ef\u83b7\u53d6\u66f4\u8be6\u7ec6\u7684\u9501\u7ade\u4e89\u548c\u7ebf\u7a0b\u72b6\u6001\u4fe1\u606f&#xff0c;\u6bd4\u5e38\u89c4processlist\u66f4\u6df1\u5165<\/p>\n<h3>2. \u6162\u67e5\u8be2\u6df1\u5ea6\u89e3\u6790&#xff1a;\u4ece\u75c7\u72b6\u5230\u75c5\u56e0<\/h3>\n<p>\u4f7f\u7528EXPLAIN\u89e3\u5256\u5178\u578b\u6162\u67e5\u8be2&#xff0c;\u66b4\u9732\u6267\u884c\u8ba1\u5212\u7684\u81f4\u547d\u7f3a\u9677&#xff1a;<\/p>\n<p>EXPLAIN SELECT * FROM orders WHERE user_id &#061; 100 AND status &#061; &#039;PAID&#039;;<\/p>\n<p>\u5206\u6790\u7ed3\u679c\u5448\u73b0\u5168\u8868\u626b\u63cf&#xff08;type&#061;ALL&#xff09;&#xff1a;<\/p>\n<table>\n<tr>idselect_typetabletypepossible_keyskeykey_lenrowsExtra<\/tr>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>SIMPLE<\/td>\n<td>orders<\/td>\n<td>ALL<\/td>\n<td>NULL<\/td>\n<td>NULL<\/td>\n<td>NULL<\/td>\n<td>120000<\/td>\n<td>Using where<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u95ee\u9898\u6839\u56e0\u9010\u6e10\u6e05\u6670&#xff1a;<\/p>\n<ul>\n<li>\u590d\u5408\u7d22\u5f15\u7f3a\u5931&#xff1a;user_id\u548cstatus\u7684\u8054\u5408\u67e5\u8be2\u6761\u4ef6\u7f3a\u4e4f\u5bf9\u5e94\u7d22\u5f15<\/li>\n<li>ORM\u6846\u67b6\u6ee5\u7528&#xff1a;Java\u5e94\u7528\u4e2d\u4f7f\u7528Hibernate\u7684&#034;\u61d2\u52a0\u8f7d&#034;\u7279\u6027\u5bfc\u81f4N&#043;1\u67e5\u8be2\u7206\u70b8<\/li>\n<li>\u8fde\u63a5\u6c60\u8017\u5c3d&#xff1a;\u9ad8\u9891\u67e5\u8be2\u8017\u5c3d\u8fde\u63a5\u6c60&#xff0c;\u5f15\u53d1\u7ebf\u7a0b\u963b\u585e\u96ea\u5d29<\/li>\n<\/ul>\n<p>\u6211\u4eec\u7279\u522b\u8bbe\u8ba1\u4e86\u4e00\u4e2a\u8bca\u65ad\u811a\u672c\u7edf\u8ba1\u67e5\u8be2\u6a21\u5f0f&#xff1a;<\/p>\n<p># \u6293\u53d6\u5178\u578b\u67e5\u8be2\u6a21\u5f0f<br \/>\npt-query-digest \/var\/log\/mysql\/mysql-slow.log \\\\<br \/>\n  &#8211;group-by fingerprint \\\\<br \/>\n  &#8211;order-by Query_time:sum \\\\<br \/>\n  &#8211;limit 10<\/p>\n<h3>3. \u6570\u636e\u5e93\u5c42\u4f18\u5316&#xff1a;\u7d22\u5f15\u4e0e\u67e5\u8be2\u91cd\u6784<\/h3>\n<h4>3.1 \u7cbe\u51c6\u7d22\u5f15\u624b\u672f<\/h4>\n<p>\u9488\u5bf9\u66b4\u9732\u7684\u95ee\u9898&#xff0c;\u6211\u4eec\u5b9e\u65bd\u4e86\u4e09\u5c42\u7d22\u5f15\u4f18\u5316&#xff1a;<\/p>\n<li>\n<p>\u5916\u952e\u7d22\u5f15\u52a0\u56fa&#xff1a;<\/p>\n<p>ALTER TABLE order_items ADD INDEX idx_order_id (order_id);<\/p>\n<\/li>\n<li>\n<p>\u590d\u5408\u7d22\u5f15\u8986\u76d6&#xff1a;<\/p>\n<p>ALTER TABLE orders ADD INDEX idx_user_status (user_id, status);<\/p>\n<\/li>\n<li>\n<p>\u524d\u7f00\u7d22\u5f15\u4f18\u5316&#xff1a;<\/p>\n<p>ALTER TABLE products ADD INDEX idx_title_prefix (title(20));<\/p>\n<\/li>\n<p>\u4f18\u5316\u540e\u6267\u884c\u8ba1\u5212\u5bf9\u6bd4&#xff1a;<\/p>\n<table>\n<tr>\u6307\u6807\u4f18\u5316\u524d\u4f18\u5316\u540e<\/tr>\n<tbody>\n<tr>\n<td>\u626b\u63cf\u884c\u6570(rows)<\/td>\n<td>120000<\/td>\n<td>15<\/td>\n<\/tr>\n<tr>\n<td>\u6267\u884c\u65f6\u95f4(ms)<\/td>\n<td>800<\/td>\n<td>3<\/td>\n<\/tr>\n<tr>\n<td>\u8fd4\u56de\u6570\u636e\u91cf(KB)<\/td>\n<td>1024<\/td>\n<td>8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>3.2 \u67e5\u8be2\u8bed\u53e5\u91cd\u6784<\/h4>\n<p>\u6539\u9020ORM\u751f\u6210\u7684SQL\u6a21\u5f0f&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u6279\u91cf\u67e5\u8be2\u66ff\u4ee3\u5faa\u73af\u67e5\u8be2&#xff1a;<\/p>\n<p>\/\/ \u53cd\u6a21\u5f0f&#xff1a;N&#043;1\u67e5\u8be2<br \/>\nList&lt;Order&gt; orders &#061; orderRepository.findByUserId(userId);<br \/>\norders.forEach(order -&gt; {<br \/>\n    List&lt;Item&gt; items &#061; itemRepository.findByOrderId(order.getId());<br \/>\n});<\/p>\n<p>\/\/ \u4f18\u5316\u65b9\u6848&#xff1a;JOIN\u67e5\u8be2<br \/>\n&#064;Query(&#034;SELECT o FROM Order o LEFT JOIN FETCH o.items WHERE o.userId &#061; :userId&#034;)<br \/>\nList&lt;Order&gt; findOrdersWithItems(&#064;Param(&#034;userId&#034;) Long userId);<\/p>\n<\/li>\n<li>\n<p>\u5206\u9875\u4f18\u5316\u6280\u5de7&#xff1a;<\/p>\n<p>\/* \u4f4e\u6548\u5199\u6cd5 *\/<br \/>\nSELECT * FROM orders LIMIT 10000, 20;<\/p>\n<p>\/* \u4f18\u5316\u65b9\u6848 *\/<br \/>\nSELECT * FROM orders WHERE id &gt; 10000 LIMIT 20;<\/p>\n<\/li>\n<\/ul>\n<h3>4. \u7f13\u5b58\u4f53\u7cfb\u5347\u7ea7&#xff1a;\u4ece\u6570\u636e\u5e93\u5230\u591a\u7ea7\u7f13\u5b58<\/h3>\n<h4>4.1 Redis\u7f13\u5b58\u7b56\u7565\u8bbe\u8ba1<\/h4>\n<p>\u6784\u5efa\u4e09\u7ea7\u7f13\u5b58\u9632\u5fa1\u4f53\u7cfb&#xff1a;<\/p>\n<li>\n<p>\u5bf9\u8c61\u7f13\u5b58&#xff1a;\u9ad8\u9891\u8bbf\u95ee\u7684\u5b8c\u6574\u4e1a\u52a1\u5bf9\u8c61<\/p>\n<p>\/\/ \u5546\u54c1\u8be6\u60c5\u7f13\u5b58\u793a\u4f8b<br \/>\npublic Product getProduct(Long id) {<br \/>\n    String key &#061; &#034;product:&#034; &#043; id;<br \/>\n    Product product &#061; redisTemplate.opsForValue().get(key);<br \/>\n    if (product &#061;&#061; null) {<br \/>\n        product &#061; productRepository.findById(id);<br \/>\n        redisTemplate.opsForValue().set(key, product, 1, TimeUnit.HOURS);<br \/>\n    }<br \/>\n    return product;<br \/>\n}<\/p>\n<\/li>\n<li>\n<p>\u67e5\u8be2\u7f13\u5b58&#xff1a;\u590d\u6742\u67e5\u8be2\u7ed3\u679c\u96c6<\/p>\n<p># Django\u67e5\u8be2\u7f13\u5b58\u793a\u4f8b<br \/>\nfrom django.core.cache import cache<\/p>\n<p>def get_user_orders(user_id):<br \/>\n    cache_key &#061; f&#039;user_orders:{user_id}&#039;<br \/>\n    orders &#061; cache.get(cache_key)<br \/>\n    if not orders:<br \/>\n        orders &#061; Order.objects.filter(user_id&#061;user_id).prefetch_related(&#039;items&#039;)<br \/>\n        cache.set(cache_key, orders, timeout&#061;300)<br \/>\n    return orders<\/p>\n<\/li>\n<li>\n<p>\u9875\u9762\u7247\u6bb5\u7f13\u5b58&#xff1a;\u52a8\u6001\u751f\u6210\u7684HTML\u7247\u6bb5<\/p>\n<p># Nginx\u914d\u7f6e\u7247\u6bb5<br \/>\nproxy_cache_path \/data\/nginx\/cache levels&#061;1:2 keys_zone&#061;my_cache:10m inactive&#061;60m;<\/p>\n<p>location ~* \\\\.(html|css|js)$ {<br \/>\n    proxy_cache my_cache;<br \/>\n    proxy_cache_valid 200 304 12h;<br \/>\n}<\/p>\n<\/li>\n<h4>4.2 \u7f13\u5b58\u4e00\u81f4\u6027\u4fdd\u969c<\/h4>\n<p>\u91c7\u7528\u53cc\u5220\u7b56\u7565\u89e3\u51b3\u7f13\u5b58\u4e0e\u6570\u636e\u5e93\u4e00\u81f4\u6027\u95ee\u9898&#xff1a;<\/p>\n<p>\/\/ \u66f4\u65b0\u64cd\u4f5c\u793a\u4f8b<br \/>\npublic void updateProduct(Product product) {<br \/>\n    \/\/ 1. \u5148\u5220\u7f13\u5b58<br \/>\n    redisTemplate.delete(&#034;product:&#034; &#043; product.getId());<\/p>\n<p>    \/\/ 2. \u66f4\u65b0\u6570\u636e\u5e93<br \/>\n    productRepository.save(product);<\/p>\n<p>    \/\/ 3. \u5ef6\u8fdf\u518d\u5220\u4e00\u6b21&#xff08;\u5e94\u5bf9\u5e76\u53d1\u573a\u666f&#xff09;<br \/>\n    executor.schedule(() -&gt; {<br \/>\n        redisTemplate.delete(&#034;product:&#034; &#043; product.getId());<br \/>\n    }, 500, TimeUnit.MILLISECONDS);<br \/>\n}<\/p>\n<h3>5. \u67b6\u6784\u7ea7\u4f18\u5316&#xff1a;\u8bfb\u5199\u5206\u79bb\u4e0e\u8fde\u63a5\u6c60\u8c03\u4f18<\/h3>\n<h4>5.1 \u6570\u636e\u5e93\u4ee3\u7406\u914d\u7f6e<\/h4>\n<p>\u901a\u8fc7ProxySQL\u5b9e\u73b0\u8bfb\u5199\u5206\u79bb&#xff1a;<\/p>\n<p># ProxySQL\u914d\u7f6e\u793a\u4f8b<br \/>\nINSERT INTO mysql_servers(hostgroup_id,hostname,port) VALUES<br \/>\n(10,&#039;master-db&#039;,3306),<br \/>\n(20,&#039;replica1-db&#039;,3306),<br \/>\n(20,&#039;replica2-db&#039;,3306);<\/p>\n<p>INSERT INTO mysql_query_rules (rule_id,active,match_pattern,destination_hostgroup,apply) VALUES<br \/>\n(1,1,&#039;^SELECT.*FOR UPDATE&#039;,10,1),<br \/>\n(2,1,&#039;^SELECT&#039;,20,1),<br \/>\n(3,1,&#039;^INSERT&#039;,10,1);<\/p>\n<h4>5.2 \u8fde\u63a5\u6c60\u53c2\u6570\u4f18\u5316<\/h4>\n<p>HikariCP\u5173\u952e\u914d\u7f6e\u9879&#xff1a;<\/p>\n<p>spring:<br \/>\n  datasource:<br \/>\n    hikari:<br \/>\n      maximum-pool-size: 20           # \u6839\u636eCPU\u6838\u5fc3\u6570\u8c03\u6574<br \/>\n      minimum-idle: 5                 # \u6700\u5c0f\u7a7a\u95f2\u8fde\u63a5<br \/>\n      idle-timeout: 600000            # \u7a7a\u95f2\u8fde\u63a5\u8d85\u65f6(ms)<br \/>\n      max-lifetime: 1800000           # \u8fde\u63a5\u6700\u5927\u5b58\u6d3b\u65f6\u95f4<br \/>\n      connection-timeout: 30000       # \u8fde\u63a5\u83b7\u53d6\u8d85\u65f6<br \/>\n      leak-detection-threshold: 60000 # \u6cc4\u6f0f\u68c0\u6d4b\u9608\u503c<\/p>\n<p>\u4f18\u5316\u540e\u7684\u6027\u80fd\u5bf9\u6bd4\u6570\u636e&#xff1a;<\/p>\n<table>\n<tr>\u573a\u666fQPS\u5e73\u5747\u54cd\u5e94\u65f6\u95f4\u9519\u8bef\u7387<\/tr>\n<tbody>\n<tr>\n<td>\u4f18\u5316\u524d<\/td>\n<td>1200<\/td>\n<td>850ms<\/td>\n<td>8.7%<\/td>\n<\/tr>\n<tr>\n<td>\u4ec5\u7d22\u5f15\u4f18\u5316<\/td>\n<td>3500<\/td>\n<td>230ms<\/td>\n<td>1.2%<\/td>\n<\/tr>\n<tr>\n<td>\u7d22\u5f15&#043;\u7f13\u5b58<\/td>\n<td>9800<\/td>\n<td>45ms<\/td>\n<td>0.3%<\/td>\n<\/tr>\n<tr>\n<td>\u5168\u94fe\u8def\u4f18\u5316<\/td>\n<td>15000<\/td>\n<td>28ms<\/td>\n<td>0.1%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5728\u6700\u7ec8\u7684\u5927\u4fc3\u4e2d&#xff0c;\u7cfb\u7edf\u5e73\u7a33\u652f\u6491\u4e86\u5e73\u65f615\u500d\u7684\u6d41\u91cf\u9ad8\u5cf0\u3002\u8fd9\u6b21\u5371\u673a\u7ed9\u6211\u4eec\u7684\u542f\u793a\u662f&#xff1a;\u6027\u80fd\u4f18\u5316\u4e0d\u662f\u4e00\u6b21\u6027\u5de5\u7a0b&#xff0c;\u800c\u9700\u8981\u5efa\u7acb\u6301\u7eed\u76d1\u63a7-\u5206\u6790-\u4f18\u5316\u7684\u95ed\u73af\u4f53\u7cfb\u3002\u7279\u522b\u5bf9\u4e8e\u4f7f\u7528ORM\u6846\u67b6\u7684\u56e2\u961f&#xff0c;\u66f4\u9700\u8981\u8b66\u60d5&#034;\u4fbf\u6377\u6027&#034;\u80cc\u540e\u9690\u85cf\u7684\u67e5\u8be2\u9677\u9631\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4eceMySQL\u6162\u67e5\u8be2\u5230\u7f13\u5b58\u4f18\u5316&#xff1a;\u4e00\u6b21\u7535\u5546\u5927\u4fc3\u524d\u7684\u6570\u636e\u5e93\u6027\u80fd\u7a81\u56f4\u6218<br 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