{"id":54338,"date":"2025-08-13T02:50:15","date_gmt":"2025-08-12T18:50:15","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/54338.html"},"modified":"2025-08-13T02:50:15","modified_gmt":"2025-08-12T18:50:15","slug":"redis-%e5%86%85%e5%ad%98%e5%a4%a7%e9%a1%b5%ef%bc%88thp%ef%bc%89%e4%b8%8e%e5%86%99%e6%97%b6%e5%a4%8d%e5%88%b6%e6%80%a7%e8%83%bd%e5%88%86%e6%9e%90%ef%bc%9a%e5%8e%9f%e7%90%86%e3%80%81%e6%bc%8f%e6%b4%9e","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/54338.html","title":{"rendered":"Redis \u5185\u5b58\u5927\u9875\uff08THP\uff09\u4e0e\u5199\u65f6\u590d\u5236\u6027\u80fd\u5206\u6790\uff1a\u539f\u7406\u3001\u6f0f\u6d1e\u3001\u4f18\u5316\u5b9e\u8df5"},"content":{"rendered":"<h2>Redis \u5185\u5b58\u5927\u9875&#xff08;THP&#xff09;\u4e0e\u5199\u65f6\u590d\u5236\u6027\u80fd\u5206\u6790&#xff1a;\u539f\u7406\u3001\u6f0f\u6d1e\u3001\u4f18\u5316\u5b9e\u8df5<\/h2>\n<p>\u5728 Redis \u6027\u80fd\u4f18\u5316\u4e0e\u6545\u969c\u6392\u67e5\u4e2d&#xff0c;\u5185\u5b58\u5927\u9875&#xff08;Transparent Huge Pages, THP&#xff09;\u673a\u5236\u5e38\u88ab\u5ffd\u7565&#xff0c;\u5374\u53ef\u80fd\u6210\u4e3a\u6301\u4e45\u5316\u548c\u5199\u5165\u5ef6\u8fdf\u7684\u7f6a\u9b41\u7978\u9996\u3002\u672c\u6587\u7cfb\u7edf\u9610\u91ca THP \u7684\u539f\u7406\u3001\u5bf9 Redis \u7684\u5f71\u54cd\u3001COW \u7684\u5e95\u5c42\u673a\u5236\u3001\u4f18\u5316\u4e0e\u5173\u95ed\u6d41\u7a0b&#xff0c;\u5e2e\u52a9\u4f60\u4ece\u6839\u672c\u4e0a\u89c4\u907f\u5927\u9875\u5f15\u53d1\u7684\u7a81\u53d1\u5ef6\u8fdf\u3002<\/p>\n<hr \/>\n<h3>\u4e00\u3001\u4ec0\u4e48\u662f\u5185\u5b58\u5927\u9875&#xff08;THP&#xff09;&#xff1f;<\/h3>\n<ul>\n<li>\u5e38\u89c4\u5185\u5b58\u9875&#xff1a;\u6bcf\u9875 4KB&#xff0c;Linux \u9ed8\u8ba4\u5206\u914d\u5355\u4f4d\u3002<\/li>\n<li>\u5185\u5b58\u5927\u9875&#xff08;THP&#xff09;&#xff1a;\u6bcf\u9875 2MB&#xff0c;\u51cf\u5c11\u9875\u8868\u6570\u91cf&#xff0c;\u63d0\u5347\u67d0\u4e9b\u573a\u666f\u4e0b\u7684\u7cfb\u7edf\u6027\u80fd&#xff08;\u5982\u5927\u6570\u636e\u5206\u6790&#xff09;\u3002<\/li>\n<li>\u4f18\u52bf&#xff1a;\u51cf\u5c11\u9875\u8868\u6570\u91cf&#xff0c;\u964d\u4f4e\u9875\u8868\u7ba1\u7406\u5f00\u9500\u3002<\/li>\n<li>\u52a3\u52bf&#xff1a;\u5185\u5b58\u5206\u914d\u7c92\u5ea6\u53d8\u5927&#xff0c;\u5bfc\u81f4\u67d0\u4e9b\u9ad8\u9891\u5199\u573a\u666f&#xff08;\u5982 Redis&#xff09;\u5ef6\u8fdf\u5267\u589e\u3002<\/li>\n<\/ul>\n<h4>\u3010\u539f\u7406\u56fe\u793a\u3011<\/h4>\n<p>graph TD<br \/>\n    A[Redis\u4e3b\u8fdb\u7a0b\u5185\u5b58\u5206\u914d] &#8211;&gt; B{4KB\u9875 or 2MB\u9875}<br \/>\n    B &#8211;&gt;|\u9ed8\u8ba4| C[4KB\u9875]<br \/>\n    B &#8211;&gt;|THP\u5f00\u542f| D[2MB\u9875]<br \/>\n    C &#8211;&gt; E[\u9875\u8868\u9879\u6570\u91cf\u591a&#xff0c;\u7ba1\u7406\u7075\u6d3b]<br \/>\n    D &#8211;&gt; F[\u9875\u8868\u9879\u6570\u91cf\u5c11&#xff0c;\u5206\u914d\u7c92\u5ea6\u5927]<\/p>\n<hr \/>\n<h3>\u4e8c\u3001THP \u5982\u4f55\u62d6\u7d2f Redis \u6027\u80fd&#xff1f;<\/h3>\n<h4>2.1 \u6301\u4e45\u5316\u573a\u666f\u4e0b\u7684 COW \u653e\u5927\u6548\u5e94<\/h4>\n<ul>\n<li>Redis RDB\u5feb\u7167\/AOF\u91cd\u5199\u65f6&#xff0c;\u4e3b\u8fdb\u7a0b fork \u5b50\u8fdb\u7a0b\u3002<\/li>\n<li>fork \u540e&#xff0c;\u4e3b\u5b50\u8fdb\u7a0b\u901a\u8fc7 \u5199\u65f6\u590d\u5236&#xff08;Copy On Write, COW&#xff09; \u5171\u4eab\u5185\u5b58\u3002<\/li>\n<li>\u4e3b\u8fdb\u7a0b\u5199\u6570\u636e\u65f6&#xff0c;\u9700\u5148\u62f7\u8d1d\u6574\u4e2a\u5185\u5b58\u9875\u518d\u5199\u5165\u3002<\/li>\n<\/ul>\n<h5>\u3010COW\u8fc7\u7a0b\u7b80\u6790\u3011<\/h5>\n<li>\u5b50\u8fdb\u7a0b\u8bfb\u53d6 fork \u65f6\u5185\u5b58\u5feb\u7167\u3002<\/li>\n<li>\u4e3b\u8fdb\u7a0b\u5199\u6570\u636e \u2192 MMU \u68c0\u6d4b\u53ea\u8bfb\u9875 \u2192 \u89e6\u53d1\u5f02\u5e38 \u2192 \u5185\u6838\u5206\u914d\u65b0\u7269\u7406\u9875\u5e76\u590d\u5236\u65e7\u6570\u636e\u3002<\/li>\n<li>\u82e5\u662f\u5927\u9875&#xff08;2MB&#xff09;&#xff0c;\u5373\u4f7f\u53ea\u5199 10B&#xff0c;\u4e5f\u9700\u590d\u5236\u6574\u9875 2MB\u3002<\/li>\n<p>\u5927\u9875\u4e0b\u6bcf\u6b21 COW \u7684\u8017\u65f6\u662f\u666e\u901a\u9875\u7684 512 \u500d&#xff01;<\/p>\n<h4>2.2 bigkey \u653e\u5927\u6548\u5e94<\/h4>\n<ul>\n<li>bigkey \u5360\u7528\u591a\u4e2a\u5927\u9875&#xff0c;COW \u65f6\u9700\u8981\u53cd\u590d\u590d\u5236\u591a\u4e2a 2MB \u5185\u5b58\u5757&#xff0c;\u5ef6\u8fdf\u66f4\u4e25\u91cd\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e09\u3001\u5982\u4f55\u68c0\u6d4b\u4e0e\u5173\u95ed\u5185\u5b58\u5927\u9875<\/h3>\n<h4>3.1 \u68c0\u67e5\u5f53\u524d THP \u72b6\u6001<\/h4>\n<p><span class=\"token function\">cat<\/span> \/sys\/kernel\/mm\/transparent_hugepage\/enabled<br \/>\n<span class=\"token comment\"># \u8f93\u51fa\u793a\u4f8b&#xff1a;[always] madvise never<\/span><br \/>\n<span class=\"token comment\"># \u89e3\u91ca&#xff1a;[] \u9009\u4e2d\u7684\u4e3a\u5f53\u524d\u7b56\u7565&#xff0c;always&#061;\u5f00\u542f&#xff0c;never&#061;\u5173\u95ed<\/span><\/p>\n<h4>3.2 \u4e34\u65f6\u5173\u95ed THP<\/h4>\n<p><span class=\"token builtin class-name\">echo<\/span> never <span class=\"token operator\">&gt;<\/span> \/sys\/kernel\/mm\/transparent_hugepage\/enabled<br \/>\n<span class=\"token comment\"># \u7acb\u5373\u751f\u6548&#xff0c;\u91cd\u542f\u5931\u6548<\/span><\/p>\n<h4>3.3 \u6c38\u4e45\u5173\u95ed THP<\/h4>\n<li>\u7f16\u8f91 \/etc\/rc.local&#xff0c;\u6dfb\u52a0\u5173\u95ed\u547d\u4ee4<span class=\"token builtin class-name\">echo<\/span> <span class=\"token string\">&#039;echo never &gt; \/sys\/kernel\/mm\/transparent_hugepage\/enabled&#039;<\/span> <span class=\"token operator\">&gt;&gt;<\/span> \/etc\/rc.local<br \/>\n<span class=\"token function\">chmod<\/span> &#043;x \/etc\/rc.local\n <\/li>\n<li>\u6216\u5728\u542f\u52a8\u811a\u672c\/\u4e91\u4e3b\u673a\u81ea\u5b9a\u4e49\u542f\u52a8\u9879\u5199\u5165\u5173\u95ed\u547d\u4ee4<\/li>\n<hr \/>\n<h3>\u56db\u3001\u5e95\u5c42\u539f\u7406&#xff1a;Copy On Write (COW)<\/h3>\n<ul>\n<li>\u57fa\u4e8e\u865a\u62df\u5185\u5b58\u4e0e MMU \u786c\u4ef6\u652f\u6301\u3002<\/li>\n<li>\u9875\u6807\u8bb0\u4e3a\u53ea\u8bfb&#xff0c;\u5199\u5165\u65f6 MMU \u629b\u5f02\u5e38&#xff0c;\u64cd\u4f5c\u7cfb\u7edf\u5206\u914d\u65b0\u7269\u7406\u9875\u5e76\u590d\u5236\u6570\u636e\u3002<\/li>\n<li>\u5927\u9875\u5bfc\u81f4\u6bcf\u6b21\u5199\u5165\u65f6\u590d\u5236\u7684\u6570\u636e\u91cf\u5927\u5e45\u63d0\u5347\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>\u4e94\u3001\u4f18\u5316\u65b9\u6848\u4e0e\u5b9e\u6218\u5efa\u8bae<\/h3>\n<table>\n<tr>\u4f18\u5316\u63aa\u65bd\u6548\u679c\/\u98ce\u9669\u9002\u7528\u573a\u666f<\/tr>\n<tbody>\n<tr>\n<td>\u5f7b\u5e95\u5173\u95ed THP<\/td>\n<td>\u6301\u4e45\u5316\u5ef6\u8fdf\u663e\u8457\u964d\u4f4e&#xff0c;\u65e0\u526f\u4f5c\u7528<\/td>\n<td>\u6240\u6709 Redis \u670d\u52a1<\/td>\n<\/tr>\n<tr>\n<td>\u5b9a\u671f\u68c0\u67e5 THP \u72b6\u6001<\/td>\n<td>\u9632\u6b62\u4e91\u4e3b\u673a\/\u81ea\u52a8\u5316\u811a\u672c\u8bef\u5f00\u542f<\/td>\n<td>\u81ea\u52a8\u8fd0\u7ef4<\/td>\n<\/tr>\n<tr>\n<td>\u62c6\u5206 bigkey<\/td>\n<td>\u51cf\u5c11\u5927\u9875\u9891\u7e41 COW<\/td>\n<td>\u5927\u6570\u636e\u7ed3\u6784\u573a\u666f<\/td>\n<\/tr>\n<tr>\n<td>\u4f4e\u5ef6\u8fdf SSD<\/td>\n<td>\u8f85\u52a9\u89e3\u51b3\u6301\u4e45\u5316 I\/O \u74f6\u9888<\/td>\n<td>\u9ad8\u6027\u80fd\u4e1a\u52a1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3>\u516d\u3001\u9ad8\u9636\u67b6\u6784\u4e0e\u96c6\u6210\u5efa\u8bae<\/h3>\n<table>\n<tr>\u6280\u672f\u6808\u96c6\u6210\u65b9\u5f0f\u9ad8\u9636\u4f18\u5316\u5efa\u8bae<\/tr>\n<tbody>\n<tr>\n<td>K8s\/Docker<\/td>\n<td>\u5bb9\u5668\u542f\u52a8\u65f6\u6267\u884c\u5173\u95edTHP\u547d\u4ee4<\/td>\n<td>\u955c\u50cf\u5185\u5d4c\u5173\u95ed\u811a\u672c<\/td>\n<\/tr>\n<tr>\n<td>\u4e91 Redis<\/td>\n<td>\u4e91\u5382\u5546\u6587\u6863\u786e\u8ba4 THP \u914d\u7f6e<\/td>\n<td>\u81ea\u52a8\u5316\u68c0\u67e5\u4e0e\u62a5\u8b66<\/td>\n<\/tr>\n<tr>\n<td>DevOps<\/td>\n<td>\u8fd0\u7ef4\u5e73\u53f0\u5b9a\u671f\u626b\u63cf\u5e76\u81ea\u52a8\u4fee\u590d THP<\/td>\n<td>\u6301\u4e45\u5316\u524d\u7f6e\u5065\u5eb7\u68c0\u67e5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3>\u4e03\u3001\u6743\u5a01\u8d44\u6599\u4e0e\u53c2\u8003\u6587\u732e<\/h3>\n<li>Redis \u5b98\u65b9 FAQ &#8211; THP \u95ee\u9898<\/li>\n<li>Linux THP \u5b98\u65b9\u6587\u6863<\/li>\n<li>Redis \u6027\u80fd\u4f18\u5316\u5b9e\u8df5<\/li>\n<li>Redis \u6e90\u7801 github<\/li>\n<hr \/>\n<h3>\u516b\u3001\u603b\u7ed3\u4e0e\u7cfb\u7edf\u6027\u8ba4\u77e5<\/h3>\n<p>Redis \u6301\u4e45\u5316\u4e0e\u9ad8\u53ef\u7528\u573a\u666f\u4e0b&#xff0c;THP \u4f1a\u6781\u5927\u653e\u5927 COW \u7684\u5185\u5b58\u590d\u5236\u6210\u672c&#xff0c;\u5bfc\u81f4\u5199\u5165\u5ef6\u8fdf\u7a81\u53d1\u98d9\u5347\u3002\u5f7b\u5e95\u5173\u95ed THP&#xff0c;\u7528 4KB \u5e38\u89c4\u9875&#xff0c;\u662f\u6240\u6709 Redis \u670d\u52a1\u5668\u7684\u57fa\u7840\u4f18\u5316\u9879\u3002\u7406\u89e3 THP \u4e0e COW \u7684\u5e95\u5c42\u4ea4\u4e92&#xff0c;\u662f\u4fdd\u969c Redis \u6027\u80fd\u7684\u5fc5\u5907\u529f\u8bfe\u3002<\/p>\n<hr \/>\n<p>\u901f\u8bb0\u603b\u7ed3&#xff1a;<\/p>\n<p>\u201cTHP\u5927\u9875\u62d6\u6162COW&#xff0c;\u6301\u4e45\u5316\u5ef6\u8fdf\u9ad8&#xff1b;\u5173\u95edTHP\u4fdd\u4f4e\u5ef6\u8fdf&#xff0c;4KB\u9875\u6700\u4f18\u9009&#xff1b;\u5b9a\u671f\u68c0\u67e5\u9632\u8bef\u5f00&#xff0c;bigkey\u62c6\u5206\u66f4\u9ad8\u6548\u3002\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb895\u6b21\uff0c\u70b9\u8d5e45\u6b21\uff0c\u6536\u85cf10\u6b21\u3002\u5e38\u89c4\u5185\u5b58\u9875\uff1a\u6bcf\u9875 4KB\uff0cLinux \u9ed8\u8ba4\u5206\u914d\u5355\u4f4d\u3002\u5185\u5b58\u5927\u9875\uff08THP\uff09\uff1a\u6bcf\u9875 2MB\uff0c\u51cf\u5c11\u9875\u8868\u6570\u91cf\uff0c\u63d0\u5347\u67d0\u4e9b\u573a\u666f\u4e0b\u7684\u7cfb\u7edf\u6027\u80fd\uff08\u5982\u5927\u6570\u636e\u5206\u6790\uff09\u3002\u4f18\u52bf\uff1a\u51cf\u5c11\u9875\u8868\u6570\u91cf\uff0c\u964d\u4f4e\u9875\u8868\u7ba1\u7406\u5f00\u9500\u3002\u52a3\u52bf\uff1a\u5185\u5b58\u5206\u914d\u7c92\u5ea6\u53d8\u5927\uff0c\u5bfc\u81f4\u67d0\u4e9b\u9ad8\u9891\u5199\u573a\u666f\uff08\u5982 Redis\uff09\u5ef6\u8fdf\u5267\u589e\u3002Redis \u6301\u4e45\u5316\u4e0e\u9ad8\u53ef\u7528\u573a\u666f\u4e0b\uff0cTHP \u4f1a\u6781\u5927\u653e\u5927 COW \u7684\u5185\u5b58\u590d\u5236\u6210\u672c\uff0c\u5bfc\u81f4\u5199\u5165\u5ef6\u8fdf\u7a81\u53d1\u98d9\u5347\u3002\u5f7b\u5e95\u5173\u95ed THP\uff0c\u7528 4KB \u5e38\u89c4\u9875\uff0c\u662f\u6240\u6709 Redis \u670d\u52a1\u5668\u7684\u57fa\u7840\u4f18\u5316\u9879\u3002\u7406\u89e3 THP \u4e0e COW \u7684\u5e95\u5c42\u4ea4\u4e92\uff0c\u662f\u4fdd\u969c Redis 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