{"id":282,"date":"2025-11-27T11:32:53","date_gmt":"2025-11-27T03:32:53","guid":{"rendered":"https:\/\/yuzikimikage.top\/?p=282"},"modified":"2025-12-01T15:55:22","modified_gmt":"2025-12-01T07:55:22","slug":"database_paramater_optimize","status":"publish","type":"post","link":"https:\/\/yuzikimikage.top\/index.php\/2025\/11\/27\/database_paramater_optimize\/","title":{"rendered":"\u6570\u636e\u5e93\u53c2\u6570\u4f18\u5316"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">1 \u64cd\u4f5c\u7cfb\u7edf\u53c2\u6570<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">1.1 \u78c1\u76d8\u9884\u8bfb\u53c2\u6570<\/h2>\n\n\n\n<p>\u5728\u5185\u5b58\u4e2d\u8bfb\u53d6\u6570\u636e\u6bd4\u4ece\u78c1\u76d8\u4e2d\u8bfb\u53d6\u6570\u636e\u8981\u5feb\u5f88\u591a\uff0c\u589e\u52a0linux\u5185\u6838\u9884\u8bfb\uff0c\u5bf9\u4e8e\u5927\u91cf\u987a\u5e8f\u8bfb\u53d6\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u6709\u6548\u51cf\u5c11I\/O\u7684\u7b49\u5f85\u65f6\u95f4\u3002<\/p>\n\n\n\n<p>kernel \u5728\u987a\u5e8f I\/O \u65f6\uff0c\u4f1a\u63d0\u524d\u628a\u5f53\u524d\u5757\u4e4b\u540e\u7684 N \u4e2a\u6247\u533a\u8bfb\u8fdb\u9875\u7f13\u5b58\uff0c\u51cf\u5c11\u540e\u7eed read() \u7cfb\u7edf\u8c03\u7528\u771f\u6b63\u843d\u76d8\u3002<\/p>\n\n\n\n<p>\u4ec5\u5bf9\u88f8\u8bbe\u5907\u3001\u76f4\u63a5 I\/O \u672a\u7ed5\u8fc7\u9875\u7f13\u5b58\u7684\u573a\u666f\u751f\u6548\uff1bPostgreSQL \u9ed8\u8ba4\u4f7f\u7528 buffered I\/O\uff0c\u56e0\u6b64\u4f1a\u88ab\u9884\u8bfb\u7b56\u7565\u5f71\u54cd\u3002<\/p>\n\n\n\n<p>\u67e5\u770b\u9884\u8bfb\u53c2\u6570<\/p>\n\n\n\n<p>\u6ce8\uff1a\u4f20\u7edf\u786c\u76d8\u6247\u533a\u7684\u5927\u5c0f\u662f512\u5b57\u8282\u3002\u4f46\u5728\u9ad8\u7ea7\u683c\u5f0f\u5316\u786c\u76d8\u4e2d\uff0c\u7269\u7406\u6247\u533a\u5927\u5c0f\u662f4096\u5b57\u8282\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u67e5\u770b\u9884\u8bfb\u591a\u5c11\u4e2a\u6247\u533a\nblockdev --getra \/dev\/sda\n# \u67e5\u770b\u9884\u8bfb\u5927\u5c0f\ncat \/sys\/class\/block\/sda\/queue\/read_ahead_kb\n# \u67e5\u770b\u6240\u6709\u78c1\u76d8\u7684\u9884\u8bfb\u8bbe\u7f6e\nblockdev -report<\/code><\/pre>\n\n\n\n<p>\u8bbe\u7f6e\u9884\u8bfb\u53c2\u6570<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u52a8\u6001\u8bbe\u7f6e\u9884\u8bfb\u591a\u5c11\u4e2a\u6247\u533a\nblockdev --setra&nbsp; 4096&nbsp; \/dev\/sda&nbsp;&nbsp; # 2 MB\nblockdev --setra 16384&nbsp; \/dev\/sda&nbsp;&nbsp; # 8 MB\n# \u67e5\u770b\u9884\u8bfb\u591a\u5c11\u4e2a\u6247\u533a\nblockdev --getra \/dev\/sda<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1.2 \u78c1\u76d8\u8c03\u5ea6\u7b97\u6cd5<\/h2>\n\n\n\n<p>\u78c1\u76d8\u8c03\u5ea6\u7b97\u6cd5\u51b3\u5b9a\u4e86 I\/O \u8bf7\u6c42\uff08\u8bfb\/\u5199\uff09\u5728\u673a\u68b0\u786c\u76d8\u4e0a\u7684\u6392\u961f\u3001\u5408\u5e76\u3001\u5bfb\u9053\u987a\u5e8f\uff0c\u76f4\u63a5\u5f71\u54cd\u6570\u636e\u5e93\u7684\u541e\u5410\u91cf\u3001\u5ef6\u8fdf\u3001\u7a33\u5b9a\u6027\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>\u7b97\u6cd5<\/strong><strong><\/strong><\/td><td><strong>\u6838\u5fc3\u601d\u60f3<\/strong><strong><\/strong><\/td><td><strong>\u6570\u636e\u5e93\u5178\u578b\u8868\u73b0<\/strong><strong><\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>noop<\/strong><\/td><td>\u7b80\u5355 FIFO\uff0c\u53ea\u5408\u5e76\u76f8\u90bb\u5757<\/td><td>\u987a\u5e8f\u626b\u63cf\u5feb\uff1b\u9ad8\u5e76\u53d1\u968f\u673a\u5199 \u2192 \u957f\u5c3e\u5ef6\u8fdf\u9ad8<\/td><\/tr><tr><td><strong>deadline<\/strong><\/td><td>\u8bfb\u4f18\u5148 + \u5199\u671f\u9650\uff0c\u9632\u6b62\u9965\u997f<\/td><td>\u4f4e\u5ef6\u8fdf OLTP \u6700\u4f18\uff1bPostgreSQL \u5b98\u65b9\u63a8\u8350<\/td><\/tr><tr><td><strong>cfq<\/strong><\/td><td>\u6309\u8fdb\u7a0b\u5206\u65f6\u95f4\u7247\uff0c\u516c\u5e73\u5e26\u5bbd<\/td><td>\u591a\u7528\u6237\u684c\u9762\u6d41\u7545\uff1bDB \u541e\u5410\u4e0b\u964d 10-30%<\/td><\/tr><tr><td><strong>bfq<\/strong><\/td><td>\u6bd4\u4f8b\u516c\u5e73 + \u7a7a\u95f2\u6279\u5904\u7406<\/td><td>\u684c\u9762\u591a\u5a92\u4f53\u597d\uff1bDB \u65e0\u4f18\u52bf<\/td><\/tr><tr><td><strong>kyber<\/strong><\/td><td>\u6700\u65b0\u5185\u6838\u9ed8\u8ba4\uff0c\u81ea\u9002\u5e94<\/td><td>\u63a5\u8fd1 deadline\uff0c\u968f\u673a\u5199\u66f4\u7a33<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u5982\u4f55\u9009\u62e9<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>\u573a\u666f<\/strong><\/td><td><strong>\u63a8\u8350\u7b97\u6cd5<\/strong><\/td><td><strong>\u8bbe\u7f6e\u547d\u4ee4<\/strong><\/td><\/tr><\/thead><tbody><tr><td>\u7eaf HDD\u3001OLTP \u4e3b\u529b<\/td><td>deadline<\/td><td>echo deadline &gt; \/sys\/block\/sdX\/queue\/scheduler<\/td><\/tr><tr><td>SSD\/NVMe<\/td><td>noop \/ kyber<\/td><td>\u9ed8\u8ba4\u5373\u53ef<\/td><\/tr><tr><td>\u6df7\u5408\u9635\u5217<\/td><td>deadline<\/td><td>\u540c HDD<\/td><\/tr><tr><td>\u684c\u9762\/\u591a\u5a92\u4f53<\/td><td>bfq<\/td><td>\u7cfb\u7edf\u9ed8\u8ba4<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">1.3 \u64cd\u4f5c\u7cfb\u7edf\u5927\u9875<\/h2>\n\n\n\n<p>\u5b98\u65b9\u4e0e\u5b9e\u6d4b\u7ecf\u9a8c\u7ed9\u51fa\u4e24\u6761\u786c\u6307\u6807\uff1a<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>shared_buffers \u2265 8 GB<br>\u5c0f\u4e8e 8 GB \u65f6\uff0c\u9875\u8868\u5360\u7528\u4e0d\u8fc7\u51e0\u767e MB\uff0c\u5f00\u4e0d\u5f00 Huge Pages \u5dee\u522b\u51e0\u4e4e\u6d4b\u4e0d\u5230\uff1b\u2265 8 GB \u540e\uff0c\u666e\u901a 4 kB \u9875\u8868\u5f00\u59cb\u81a8\u80c0\u5230 GB \u7ea7\uff0cHuge Pages \u6536\u76ca\u660e\u663e\u3002<\/li>\n\n\n\n<li>\u6216 \u8fde\u63a5\u6570 \u2265 500 \u4e14 shared_buffers \u2265 4 GB<br>\u6bcf\u6761\u540e\u7aef\u8fdb\u7a0b\u5bf9 shared_buffers \u505a\u7b2c\u4e00\u6b21 touch \u4f1a\u6d88\u8017\u9875\u8868\u9879\uff0c\u5927\u5e76\u53d1\u4e0b\u9875\u8868\u603b\u548c\u53ef\u80fd &gt; \u7269\u7406\u5185\u5b58 5 %\uff0c\u6b64\u65f6\u5373\u4f7f shared_buffers \u53ea\u6709 4 GB \u4e5f\u5efa\u8bae\u5f00\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u2014\u2014 \u56e0\u6b64\u5b9e\u52a1\u53e3\u8bc0\uff1a<\/p>\n\n\n\n<p>\u201cshared_buffers \u4e00\u5230 8 GB \u5c31\u5f00 Huge Pages\uff1b\u8fde\u63a5\u7834 500\uff0c4 GB \u5c31\u53ef\u4ee5\u5f00\u3002\u201d<\/p>\n\n\n\n<p>\u989d\u5916\u6ce8\u610f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5fc5\u987b <strong>\u5148\u8bbe\u7f6e\u597d vm.nr_hugepages<\/strong>\uff08\u8986\u76d6 shared_buffers \u00d7 110 %\uff09\u518d\u542f\u52a8 PG\uff0c\u5426\u5219 huge_pages=on \u4f1a\u542f\u52a8\u5931\u8d25\u3002<\/li>\n\n\n\n<li>\u53ea\u7b97 shared_buffers\uff0c<strong>\u4e0d\u8981<\/strong>\u628a OS cache\u3001work_mem \u7b97\u8fdb Huge Pages\uff0c\u90a3\u4e9b\u4ecd\u8d70\u666e\u901a 4 kB \u9875\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u914d\u7f6e\u65b9\u6cd5\u89c1\u6587\u7ae0\uff1a<a href=\"https:\/\/yuzikimikage.top\/index.php\/2025\/07\/14\/hugepages\/\" data-type=\"post\" data-id=\"244\">PG\u5f00\u542f\u5927\u9875<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1.4 \u900f\u660e\u5927\u9875<\/h2>\n\n\n\n<p>\u900f\u660e\u5927\u9875\uff08Transparent Huge Pages, THP\uff09\u5bf9 PostgreSQL <strong>\u51e0\u4e4e\u53ea\u6709\u8d1f\u9762\u4f5c\u7528<\/strong>\uff0c\u5b98\u65b9\u6587\u6863\u4e0e\u5927\u91cf\u5b9e\u6d4b\u90fd\u5efa\u8bae<strong>\u663e\u5f0f\u5173\u95ed<\/strong>\uff0c\u539f\u56e0\u5982\u4e0b\uff1a<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>1. <\/strong><strong>\u5185\u5b58\u81a8\u80c0 &amp; OOM <\/strong><strong>\u98ce\u9669<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>THP \u9ed8\u8ba4 2 MB \u9875\uff0c<strong>\u4efb\u610f<\/strong><strong> 4 kB <\/strong><strong>\u9875<\/strong>\u53ea\u8981\u88ab\u8fde\u7eed\u8bbf\u95ee\u5c31\u53ef\u80fd\u88ab<strong>\u81ea\u52a8\u5408\u5e76<\/strong>\u6210 2 MB\u3002<\/li>\n\n\n\n<li>PostgreSQL \u7684 work_mem\u3001maintenance_work_mem\u3001\u4e34\u65f6\u7f13\u51b2\u533a\u3001\u5185\u6838\u9875\u7f13\u5b58\u90fd\u662f<strong>\u5206\u6563\u7684\u5c0f\u5757<\/strong>\uff0c\u5408\u5e76\u540e\u5355\u8fdb\u7a0b\u53ef\u80fd\u77ac\u95f4\u5403\u6389 <strong>\u6570\u767e MB <\/strong><strong>\u7269\u7406\u5185\u5b58<\/strong>\uff0c\u89e6\u53d1\u7cfb\u7edf OOM-killer \u628a PG \u540e\u7aef\u6740\u6389\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>2. <\/strong><strong>\u5199\u653e\u5927 &amp; <\/strong><strong>\u5ef6\u8fdf\u6296\u52a8<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Copy-on-Write<\/strong> \u673a\u5236\uff1aTHP \u53ea\u8981\u6709\u4e00\u4e2a\u5b57\u8282\u4fee\u6539\uff0c\u6574\u9875\uff082 MB\uff09\u590d\u5236\u4e00\u6b21\u3002<\/li>\n\n\n\n<li>\u5927\u6279\u91cf UPDATE\/VACUUM\/CREATE INDEX \u4f1a\u4ea7\u751f <strong>\u5de8\u91cf\u7ea7 2 MB <\/strong><strong>\u5199<\/strong>\uff0c\u5bfc\u81f4<ul><li>\u78c1\u76d8\u77ac\u65f6 I\/O \u98d9\u5347<\/li><\/ul><ul><li>\u5e73\u5747\u5ef6\u8fdf\u4ece 5 ms \u2192 50-100 ms \u6296\u52a8<\/li><\/ul>\n<ul class=\"wp-block-list\">\n<li>WAL \u91cf\u95f4\u63a5\u589e\u52a0\uff08\u810f\u9875\u53d8\u591a\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>3. <\/strong><strong>\u7f3a\u9875\u5f02\u5e38\u653e\u5927<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>THP \u5408\u5e76\u5931\u8d25\u65f6\u4f1a\u9000\u56de\u5230 <strong>khugepaged <\/strong><strong>\u5185\u6838\u7ebf\u7a0b\u540e\u53f0\u91cd\u8bd5<\/strong>\uff0c\u5360\u7528 CPU\uff1b<\/li>\n\n\n\n<li>PostgreSQL \u7684\u9ad8\u5e76\u53d1\u77ed\u67e5\u8be2\uff08&lt;10 ms\uff09\u4f1a\u88ab <strong>khugepaged <\/strong><strong>\u62a2\u5360<\/strong>\uff0cTPS \u4e0b\u964d 10-30%\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>4. <\/strong><strong>\u4e0e Huge Pages <\/strong><strong>\u6b63\u4ea4\u51b2\u7a81<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u900f\u660e\u5927\u9875<\/strong> \u2260 <strong>\u6807\u51c6 Huge Pages<\/strong>\uff1b\u540e\u8005\u9700\u8981\u9884\u5148\u5206\u914d\u3001\u56fa\u5b9a\u5927\u5c0f\uff0cTHP \u662f<strong>\u8fd0\u884c\u65f6\u81ea\u52a8\u62c6\u5206<\/strong><strong>\/<\/strong><strong>\u5408\u5e76<\/strong>\uff0c\u4e24\u8005\u673a\u5236\u72ec\u7acb\u3002<\/li>\n\n\n\n<li>\u82e5\u5df2\u914d\u7f6e vm.nr_hugepages \u7ed9 PG \u4e13\u7528\uff0cTHP \u4ecd\u4f1a\u5bf9<strong>\u5176\u4f59\u5185\u5b58<\/strong>\uff08work_mem\u3001\u9875\u7f13\u5b58\uff09\u505a\u5408\u5e76\uff0c\u7ee7\u7eed\u5e26\u6765\u4e0a\u8ff0\u526f\u4f5c\u7528\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4e00\u952e\u5173\u95ed\u65b9\u6cd5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u4e34\u65f6\necho never &gt; \/sys\/kernel\/mm\/transparent_hugepage\/enabled\necho never &gt; \/sys\/kernel\/mm\/transparent_hugepage\/defrag\n# \u6c38\u4e45\uff1agrub \u5185\u6838\u53c2\u6570\ngrubby --update-kernel=ALL --args=\"transparent_hugepage=never\"\nreboot<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u6216\u8005\u914d\u7f6e\u7cfb\u7edf\u670d\u52a1\uff0c\u53ef\u5b9e\u73b0\u6c38\u4e45\u5173\u95ed\u900f\u660e\u5927\u9875\uff0croot\u7528\u6237\u6267\u884c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>vi \/etc\/systemd\/system\/disable-thp.service\n&#91;Unit]\nDescription=Disable Transparent Huge Pages (THP)\n\n&#91;Service]\nType=simple\nExecStart=\/bin\/sh -c \"echo 'never' &gt; \/sys\/kernel\/mm\/transparent_hugepage\/enabled &amp;&amp; echo 'never' &gt; \/sys\/kernel\/mm\/transparent_hugepage\/defrag\"\n\n&#91;Install]\nWantedBy=multi-user.target<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<p>\u52a0\u8f7d\u670d\u52a1\uff0c\u542f\u52a8\u670d\u52a1\u5e76\u8bbe\u7f6e\u5f00\u673a\u542f\u52a8\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>systemctl daemon-reload\nsystemctl start disable-thp\nsystemctl enable disable-thp<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">1.5 SHMMAX\u3001SHMALL\u3001SHMMNI<\/h2>\n\n\n\n<p>\u8ba1\u7b97\u5185\u6838\u53c2\u6570\u7684\u503c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>echo \"kernel.sem= `cat \/proc\/sys\/kernel\/sem`\" &amp;&amp; cat \/proc\/meminfo|grep MemTotal|awk {'print $2'*1024*0.8\/$(getconf PAGE_SIZE)}|awk '{printf \"kernel.shmall=%d\\n\",$1}' &amp;&amp; cat \/proc\/meminfo|grep MemTotal| awk '{printf \"kernel.shmmax=%d\\n\",$2*1024*0.8}' &amp;&amp; echo \"kernel.shmmni =`cat \/proc\/sys\/kernel\/shmmni`\"<\/code><\/pre>\n\n\n\n<p>\u7f16\u8f91 \/etc\/sysctl.conf \uff0c\u6dfb\u52a0\u5982\u4e0b\u4fe1\u606f\u3002shmall\u3001shmmax\u3001shmmni\u76f4\u63a5\u53d6\u4e0a\u4e00\u6b65\u8ba1\u7b97\u7684\u503c\u3002<\/p>\n\n\n\n<p>\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff0c\u4f7f\u914d\u7f6e\u751f\u6548\uff08\u6ce8\u610f\u82e5\u90e8\u5206\u53c2\u6570\u62a5\u9519\uff0c\u53ef\u914c\u60c5\u4fee\u6539\u53c2\u6570\u914d\u7f6e\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl -p<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SHMMAX\u662f\u4e00\u4e2a\u5185\u6838\u53c2\u6570\uff0c\u7528\u4e8e\u5b9a\u4e49\u4e00\u4e2aLinux\u8fdb\u7a0b\u53ef\u4ee5\u5206\u914d\u7684\u5355\u4e2a\u5171\u4eab\u5185\u5b58\u6bb5\u7684\u6700\u5927\u5927\u5c0f\u3002SHMMAX\u7684\u503c\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d\uff0c\u8bbe\u7f6e\u592a\u5c0f\u4f1a\u5bfc\u81f4\u5b9e\u4f8b\u542f\u52a8\u5931\u8d25\u3002<\/li>\n\n\n\n<li>SHMALL\u662f\u53e6\u4e00\u4e2a\u7528\u4e8e\u5b9a\u4e49\u7cfb\u7edf\u8303\u56f4\u7684\u5171\u4eab\u5185\u5b58\u9875\u603b\u9875\u6570\u7684\u5185\u6838\u53c2\u6570\u3002<\/li>\n\n\n\n<li>SHMMNI\u5b9a\u4e49\u4e86\u7cfb\u7edf\u7ea7\u522b\u7684\u5171\u4eab\u5185\u5b58\u6bb5\u7684\u6700\u5927\u6570\u91cf\uff0c\u91c7\u7528\u9ed8\u8ba4\u503c4096\u5373\u53ef\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">1.6 vm.swappiness<\/h2>\n\n\n\n<p>vm.swappiness\u662f\u53e6\u4e00\u4e2a\u53ef\u80fd\u5f71\u54cd\u6570\u636e\u5e93\u6027\u80fd\u7684\u5185\u6838\u53c2\u6570\u3002<\/p>\n\n\n\n<p>\u6b64\u53c2\u6570\u7528\u4e8e\u63a7\u5236Linux\u7cfb\u7edf\u4e0a\u5c06\u9875\u9762\u5728swap\u5206\u533a\u548c\u5185\u5b58\u95f4\u8fdb\u884c\u4ea4\u6362\u7684\u884c\u4e3a\u3002<\/p>\n\n\n\n<p>\u6b64\u53c2\u6570\u503c\u503c\u7684\u8303\u56f4\u4e3a0\u5230100\u3002<\/p>\n\n\n\n<p>0\u8868\u793a\u7981\u7528\u4ea4\u6362\uff0c\u6700\u5927\u9650\u5ea6\u4f7f\u7528\u7269\u7406\u5185\u5b58\uff0c\u7136\u540e\u624d\u4f7f\u7528swap\u5206\u533a\uff0c100\u8868\u793a\u79ef\u6781\u4f7f\u7528swap\u5206\u533a\u8fdb\u884c\u4ea4\u6362\u3002\u6709\u4e9b\u6570\u636e\u5e93\u5efa\u8bae\u4e0d\u4f7f\u7528\u4ea4\u6362\u533a\uff0c\u4ee5\u83b7\u5f97\u66f4\u597d\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n<p>\u2014\u67e5\u770b\u5f53\u524d\u8bbe\u7f6e\u7684\u503c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># cat \/proc\/sys\/vm\/swappiness\n30#\u8868\u793a\u5f53\u7269\u7406\u5185\u5b58\u4f7f\u7528\u7387\u8fbe\u523070%\u65f6\uff0c\u624d\u4f7f\u7528swap\u5206\u533a<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">2 \u6570\u636e\u5e93\u53c2\u6570<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">2.1 shared_buffer<\/h2>\n\n\n\n<p>PostgreSQL\u4f7f\u7528\u81ea\u5df1\u7684\u7f13\u51b2\u533a\uff0c\u4e5f\u4f7f\u7528\u5185\u6838\u7f13\u51b2IO\u3002<\/p>\n\n\n\n<p>\u8fd9\u610f\u5473\u7740\u6570\u636e\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\u4e24\u6b21\uff0c\u9996\u5148\u662fPostgreSQL\u7f13\u51b2\u533a\uff0c\u7136\u540e\u662f\u5185\u6838\u7f13\u51b2\u533a\u3002<\/p>\n\n\n\n<p>\u4e0e\u5176\u4ed6\u6570\u636e\u5e93\u4e0d\u540c\uff0cPostgreSQL\u4e0d\u63d0\u4f9b\u76f4\u63a5IO\u3002\u8fd9\u79f0\u4e3a\u53cc\u7f13\u51b2\u3002<\/p>\n\n\n\n<p>PostgreSQL\u7f13\u51b2\u533a\u79f0\u4e3ashared_buffers\uff0c\u5b83\u662f\u5927\u591a\u6570\u64cd\u4f5c\u7cfb\u7edf\u6700\u6709\u6548\u7684\u53ef\u8c03\u53c2\u6570\u3002<\/p>\n\n\n\n<p>PostgreSQL\u5c06\u7528shared_buffers\u53c2\u6570\u7f13\u5b58\u5982\u4e0b\u6570\u636e\uff1a\u8868\u6570\u636e\u3001\u7d22\u5f15\u3001\u6267\u884c\u8ba1\u5212<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.2 wal_buffer<\/h2>\n\n\n\n<p>PostgreSQL\u5c06\u5176WAL\uff08\u9884\u5199\u65e5\u5fd7\uff09\u8bb0\u5f55\u5199\u5165\u7f13\u51b2\u533a\uff0c\u7136\u540e\u5c06\u8fd9\u4e9b\u7f13\u51b2\u533a\u5237\u65b0\u5230\u78c1\u76d8\u3002<\/p>\n\n\n\n<p>\u7f13\u51b2\u533a\u7684\u9ed8\u8ba4\u5927\u5c0f\uff0c\u7531wal_buffers\u5b9a\u4e49\uff0c\u4f46\u5982\u679c\u60a8\u6709\u5927\u91cf\u5e76\u53d1\u8fde\u63a5\uff0c\u5219\u8f83\u9ad8\u7684\u503c\u53ef\u4ee5\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.3 effective_cache_size<\/h2>\n\n\n\n<p>\u8be5effective_cache_size\u63d0\u4f9b\u4e86\u53ef\u4ee5\u7528\u4e8e\u78c1\u76d8\u7f13\u5b58\u5b58\u50a8\u5668\u7684\u4f30\u8ba1\u3002<\/p>\n\n\n\n<p>\u5b83\u53ea\u662f\u4e00\u4e2a\u6307\u5bfc\u539f\u5219\uff0c\u800c\u4e0d\u662f\u786e\u5207\u5206\u914d\u7684\u5185\u5b58\u6216\u7f13\u5b58\u5927\u5c0f\u3002<\/p>\n\n\n\n<p>\u5b83\u4e0d\u5206\u914d\u5b9e\u9645\u5185\u5b58\uff0c\u800c\u662f\u544a\u8bc9\u4f18\u5316\u5668\u5185\u6838\u4e2d\u53ef\u7528\u7684\u7f13\u5b58\u91cf\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u5c06\u6b64\u503c\u8bbe\u7f6e\u5f97\u592a\u4f4e\uff0c\u67e5\u8be2\u8ba1\u5212\u7a0b\u5e8f\u53ef\u4ee5\u51b3\u5b9a\u4e0d\u4f7f\u7528\u67d0\u4e9b\u7d22\u5f15\uff0c\u5373\u4f7f\u5b83\u4eec\u6709\u7528\u3002<\/p>\n\n\n\n<p>\u56e0\u6b64\uff0c\u8bbe\u7f6e\u8f83\u5927\u7684\u503c\u603b\u662f\u6709\u76ca\u7684\u3002<\/p>\n\n\n\n<p>\u5efa\u8bae\u4f7f\u7528\u9ed8\u8ba4\u503c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.4 work_mem<\/h2>\n\n\n\n<p>\u6307\u5b9a\u5728\u5199\u5165\u78c1\u76d8\u4e0a\u7684\u4e34\u65f6\u6587\u4ef6\u4e4b\u524d\uff0cORDERBY\uff0cDISTINCT\uff0cJOIN\u548c\u54c8\u5e0c\u8868\u7684\u5185\u90e8\u64cd\u4f5c\u5c06\u4f7f\u7528\u7684\u5185\u5b58\u91cf\u3002<\/p>\n\n\n\n<p>\u6b64\u914d\u7f6e\u7528\u4e8e\u590d\u6742\u6392\u5e8f\uff0c\u5982\u679c\u5fc5\u987b\u8fdb\u884c\u590d\u6742\u6392\u5e8f\uff0c\u5219\u589e\u52a0work_mem\u7684\u503c\u4ee5\u83b7\u5f97\u826f\u597d\u7ed3\u679c\u3002\u5185\u5b58\u4e2d\u7684\u6392\u5e8f\u6bd4\u6ea2\u51fa\u5230\u78c1\u76d8\u7684\u6392\u5e8f\u5feb\u5f97\u591a\u3002<\/p>\n\n\n\n<p>\u8bbe\u7f6e\u975e\u5e38\u9ad8\u7684\u503c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u90e8\u7f72\u73af\u5883\u51fa\u73b0\u5185\u5b58\u74f6\u9888\uff0c\u56e0\u4e3a\u6b64\u53c2\u6570\u662f\u6309\u7528\u6237\u6392\u5e8f\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u60a8\u6709\u8bb8\u591a\u7528\u6237\u5c1d\u8bd5\u6267\u884c\u6392\u5e8f\u64cd\u4f5c\uff0c\u7cfb\u7edf\u5c06\u4e3a\u6240\u6709\u7528\u6237\u5206\u914dwork_mem*\u603b\u6392\u5e8f\u64cd\u4f5c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.5 maintenance_work_mem<\/h2>\n\n\n\n<p>maintenance_work_mem\u662f\u7528\u4e8e\u7ef4\u62a4\u4efb\u52a1\u7684\u5185\u5b58\u8bbe\u7f6e\u3002\u9ed8\u8ba4\u503c\u4e3a64MB\u3002<\/p>\n\n\n\n<p>\u8bbe\u7f6e\u8f83\u5927\u7684\u503c\u6709\u52a9\u4e8e\u6267\u884cVACUUM\uff0cRESTORE\uff0cCREATEINDEX\uff0cADD FOREIGN KEY\u548cALTERTABLE\u7b49\u4efb\u52a1\u3002<\/p>\n\n\n\n<p>\u7531\u4e8e\u4f1a\u8bdd\u4e2d\u53ea\u80fd\u540c\u65f6\u6267\u884c\u5176\u4e2d\u4e00\u4e2a\u64cd\u4f5c\uff0c\u5e76\u4e14\u901a\u5e38\u6ca1\u6709\u591a\u4e2a\u540c\u65f6\u8fd0\u884c\uff0c\u56e0\u6b64\u5b83\u53ef\u80fd\u6bd4work_mem\u5927\u3002<\/p>\n\n\n\n<p>\u8f83\u5927\u7684\u914d\u7f6e\u53ef\u4ee5\u63d0\u9ad8VACUUM\u548c\u6570\u636e\u5e93\u8fd8\u539f\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.6 fsync<\/h2>\n\n\n\n<p>fsync \u662f PostgreSQL \u91cc\u6700\u5e95\u5c42\u3001\u4e5f\u6700\u91cd\u8981\u7684<strong>\u6301\u4e45\u5316\u5f00\u5173<\/strong>\u3002\u5b83\u63a7\u5236<strong>\u4e8b\u52a1\u63d0\u4ea4\u65f6\u662f\u5426\u628a<\/strong><strong> WAL <\/strong><strong>\u7f13\u51b2\u5f3a\u5236\u5237\u5230\u78c1\u76d8<\/strong>\uff0c\u76f4\u63a5\u51b3\u5b9a\u201c\u65ad\u7535\u540e\u6570\u636e\u4e22\u8fd8\u662f\u4e0d\u4e22\u201d\u3002<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>\u53c2\u6570\u542b\u4e49<\/li>\n<\/ol>\n\n\n\n<p>fsync = on | off<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>on<\/strong>\uff08\u9ed8\u8ba4\uff09<br>\u6bcf\u6b21 commit \u90fd\u53d1 fsync()\/fdatasync()\uff0c\u7b49\u5f85\u78c1\u76d8\u8fd4\u56de\u201c\u5df2\u843d\u76d8\u201d\u624d\u5411\u5ba2\u6237\u7aef\u56de OK\u3002<br>\u2192 \u6700\u6162\uff0c\u6700\u5b89\u5168\uff0c<strong>\u751f\u4ea7\u5fc5\u987b<\/strong><strong> on<\/strong>\u3002<\/li>\n\n\n\n<li><strong>off<\/strong><br>\u53ea\u628a WAL \u5199\u5230\u5185\u6838\u9875\u7f13\u5b58\u5c31\u8fd4\u56de\u6210\u529f\uff0c\u7531 OS \u81ea\u5df1\u51b3\u5b9a\u4ec0\u4e48\u65f6\u5019\u5237\u76d8\u3002<br>\u2192 \u5feb 10-30%\uff0c\u4f46<strong>\u5b95\u673a<\/strong><strong>=<\/strong><strong>\u4e22\u6570\u636e<\/strong>\uff0c\u53ea\u7528\u4e8e<strong>\u538b\u6d4b\u3001\u53ef\u91cd\u5efa\u7684\u6570\u4ed3\u3001\u6f14\u793a\u73af\u5883<\/strong>\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li>\u91cf\u5316\u5bf9\u6bd4\uff08HDD RAID10\uff09<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>\u6a21\u5f0f<\/strong><\/td><td><strong>pgbench TPS<\/strong><\/td><td><strong>\u5b95\u673a\u4e22\u6570\u636e\u8303\u56f4<\/strong><\/td><\/tr><\/thead><tbody><tr><td>fsync=on<\/td><td>6,800<\/td><td>0\uff08\u5df2\u843d\u76d8\uff09<\/td><\/tr><tr><td>fsync=off<\/td><td>9,100<\/td><td>\u6700\u8fd1 0-30 \u79d2\u4e8b\u52a1\u5168\u90e8\u4e22\u5931<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">2.7 synchronous_commit<\/h2>\n\n\n\n<p>\u6307\u5b9a\u5728\u547d\u4ee4\u5411\u5ba2\u6237\u7aef\u8fd4\u56de\u201c\u6210\u529f\u201d\u6307\u793a\u4e4b\u524d\uff0c\u4e8b\u52a1\u63d0\u4ea4\u662f\u5426\u5c06\u7b49\u5f85WAL\u8bb0\u5f55\u5199\u5165\u78c1\u76d8\u3002\u8fd9\u662f\u6027\u80fd\u548c\u53ef\u9760\u6027\u4e4b\u95f4\u7684\u6743\u8861\u3002\u9ed8\u8ba4\u8bbe\u7f6e\u4e3a\u201con\u201d\u3002<\/p>\n\n\n\n<p>\u53ef\u80fd\u7684\u503c\u5305\u62ec\uff1a\u201con\u201d\uff0c\u201cremote_apply\u201d\uff0c\u201cremote_write\u201d\uff0c\u201clocal\u201d\u548c\u201coff\u201d\u3002<\/p>\n\n\n\n<p>\u4e0efsync\u4e0d\u540c\uff0c\u7981\u7528\u6b64\u53c2\u6570\u4e0d\u4f1a\u4ea7\u751f\u4efb\u4f55\u6570\u636e\u5e93\u4e0d\u4e00\u81f4\u7684\u98ce\u9669\uff1a\u64cd\u4f5c\u7cfb\u7edf\u6216\u6570\u636e\u5e93\u5d29\u6e83\u53ef\u80fd\u5bfc\u81f4\u4e22\u5931\u4e00\u4e9b\u6700\u8fd1\u53d1\u751f\u7684\u53ef\u80fd\u63d0\u4ea4\u7684\u4e8b\u52a1\uff0c\u4f46\u6570\u636e\u5e93\u7684\u72b6\u6001\u5c06\u4e0e\u8fd9\u4e9b\u4e8b\u52a1\u5b8c\u5168\u76f8\u540c\uff0c\u672a\u63d0\u4ea4\u7684\u5c06\u88ab\u629b\u5f03\u3002<\/p>\n\n\n\n<p>\u5f53\u6027\u80fd\u6bd4\u4e8b\u52a1\u6301\u4e45\u6027\u66f4\u91cd\u8981\u65f6\uff0c\u505c\u7528synchronous_commit\u53ef\u80fd\u662f\u4e00\u4e2a\u6709\u7528\u7684\u66ff\u4ee3\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u8fd9\u610f\u5473\u7740\u6210\u529f\u72b6\u6001\u4e0e\u4fdd\u8bc1\u5199\u5165\u78c1\u76d8\u4e4b\u95f4\u4f1a\u5b58\u5728\u65f6\u95f4\u5dee\u3002\u5728\u670d\u52a1\u5668\u5d29\u6e83\u7684\u60c5\u51b5\u4e0b\uff0c\u5373\u4f7f\u5ba2\u6237\u7aef\u5728\u63d0\u4ea4\u65f6\u6536\u5230\u6210\u529f\u6d88\u606f\uff0c\u6570\u636e\u4e5f\u53ef\u80fd\u4e22\u5931\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4e8b\u52a1\u63d0\u4ea4\u975e\u5e38\u5feb\uff0c\u56e0\u4e3a\u5b83\u4e0d\u4f1a\u7b49\u5f85\u5237\u65b0WAL\u6587\u4ef6\uff0c\u4f46\u53ef\u9760\u6027\u53d7\u5230\u635f\u5bb3\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.8 fillfactor<\/h2>\n\n\n\n<p>\u5b83\u544a\u8bc9\u6570\u636e\u5e93\uff1a\u201c\u5728\u63d2\u5165\u6570\u636e\u65f6\uff0c\u4e0d\u8981\u628a 8 KB \u9875\u9762\u4e00\u6b21\u6027\u586b\u6ee1\uff0c\u800c\u662f\u53ea\u586b\u5230 n %\uff0c\u5269\u4e0b\u7684 (100-n)% \u7a7a\u7740\uff0c\u7559\u7ed9<strong>\u5c06\u6765\u7684 UPDATE<\/strong> \u7528\u3002\u201d<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f5c\u7528\u8303\u56f4\uff1a\u5806\u8868\uff08\u666e\u901a\u8868\uff09\u3001B-tree \u7d22\u5f15\u3001GIN \u7d22\u5f15\uff08\u4e0d\u540c\u7d22\u5f15\u7c7b\u578b\u8bed\u4e49\u7565\u6709\u5dee\u5f02\uff09\u3002<\/li>\n\n\n\n<li>\u53d6\u503c\uff1a10\u2013100\uff0c\u9ed8\u8ba4 100\uff08\u5b8c\u5168\u586b\u6ee1\uff09\u3002<\/li>\n\n\n\n<li>\u8bbe\u7f6e\u65f6\u673a\uff1aCREATE \/ ALTER TABLE\u3001CREATE \/ REINDEX INDEX\u3002<\/li>\n\n\n\n<li>\u53ea\u5f71\u54cd<strong>\u540e\u7eed<\/strong>\u63d2\u5165\uff0c\u5df2\u6709\u6570\u636e\u9700 <code>VACUUM FULL<\/code> \/ <code>REINDEX<\/code> \u624d\u80fd\u6309\u65b0\u6bd4\u4f8b\u91cd\u6574<\/li>\n<\/ul>\n\n\n\n<p>PostgreSQL \u7684 MVCC \u673a\u5236\u4e0b\uff0cUPDATE = \u6807\u8bb0\u65e7\u5143\u7ec4 + \u63d2\u5165\u65b0\u5143\u7ec4\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u9875\u9762\u5df2\u6ee1\uff0c\u65b0\u5143\u7ec4\u5fc5\u987b\u653e\u5230\u522b\u7684\u9875 \u2192 \u4ea7\u751f<strong>\u9875\u5206\u88c2<\/strong>\u3001\u7d22\u5f15\u6307\u9488\u91cd\u5b9a\u5411 \u2192 \u66f4\u591a I\/O\u3001\u66f4\u591a\u788e\u7247\u3001\u66f4\u6162\u7684 VACUUM\u3002<\/li>\n\n\n\n<li>\u82e5\u63d0\u524d\u7559\u597d\u7a7a\u4f4d\uff0c\u65b0\u7248\u672c<strong>\u4ecd\u843d\u5728\u540c\u4e00\u9875<\/strong>\uff0c\u53ef\u5229\u7528 HOT\uff08Heap-Only Tuple\uff09\u673a\u5236\uff0c<strong>\u65e0\u9700\u66f4\u65b0\u7d22\u5f15<\/strong>\uff0c\u5927\u5e45\u51cf\u4f4e\u788e\u7247\u4e0e I\/O<\/li>\n<\/ul>\n\n\n\n<p>\u9891\u7e41\u7684\u66f4\u65b0\u4f1a\u4ea7\u751f\u5927\u91cf\u6b7b\u5143\u7ec4\uff0c\u5f71\u54cd\u67e5\u8be2\u6548\u7387\uff0c\u9891\u7e41\u66f4\u65b0\u5220\u9664\u7684\u8868\/\u7d22\u5f15\u53ef\u4ee5\u4fee\u6539\u586b\u5145\u56e0\u5b50<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>-- \u5efa\u8868\u65f6\nCREATE TABLE orders(\n    id   bigserial PRIMARY KEY,\n    status int\n) WITH (fillfactor = 80);\n\n-- \u6539\u8868\u73b0\u6709\u9ed8\u8ba4\nALTER TABLE orders SET (fillfactor = 70);\nVACUUM FULL orders;          -- \u60f3\u8ba9\u65e7\u6570\u636e\u4e5f\u751f\u6548\uff0c\u9700\u8981\u91cd\u6574\n\n-- \u5efa\/\u91cd\u5efa\u7d22\u5f15\nCREATE INDEX idx_orders_status ON orders(status) WITH (fillfactor = 75);\nREINDEX INDEX idx_orders_status;   -- \u65e7\u7d22\u5f15\u7acb\u5373\u6309\u65b0\u6bd4\u4f8b\u91cd\u5efa\n\n-- \u67e5\u770b\u8868\u7ea7\u8bbe\u7f6e\nSELECT relname, reloptions FROM pg_class WHERE relname = 'orders';\n\n-- \u67e5\u770b\u7d22\u5f15\u7ea7\u8bbe\u7f6e\nSELECT indexname, reloptions FROM pg_indexes\nWHERE indexname = 'idx_orders_status';<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1 \u64cd\u4f5c\u7cfb\u7edf\u53c2\u6570 1.1 \u78c1\u76d8\u9884\u8bfb\u53c2\u6570 \u5728\u5185\u5b58\u4e2d\u8bfb\u53d6\u6570\u636e\u6bd4\u4ece\u78c1\u76d8\u4e2d\u8bfb\u53d6\u6570\u636e\u8981\u5feb\u5f88\u591a\uff0c\u589e\u52a0linux\u5185\u6838\u9884\u8bfb\uff0c\u5bf9\u4e8e\u5927\u91cf\u987a\u5e8f\u8bfb\u53d6\u7684\u64cd\u4f5c &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[22],"tags":[],"class_list":["post-282","post","type-post","status-publish","format-standard","hentry","category-22"],"_links":{"self":[{"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/posts\/282","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/comments?post=282"}],"version-history":[{"count":6,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/posts\/282\/revisions"}],"predecessor-version":[{"id":349,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/posts\/282\/revisions\/349"}],"wp:attachment":[{"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/media?parent=282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/categories?post=282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/tags?post=282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}