{"id":34013,"date":"2026-11-10T10:00:00","date_gmt":"2026-11-10T02:00:00","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=34013"},"modified":"2026-10-29T21:44:50","modified_gmt":"2026-10-29T13:44:50","slug":"mysql-replication-delay-parallel-replication","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/guides\/mysql-replication-delay-parallel-replication\/","title":{"rendered":"MySQL \u4e3b\u4ece\u590d\u5236\u5ef6\u8fdf\u6392\u67e5\uff1a Seconds_Behind_Master \u4e0e\u5e76\u884c\u590d\u5236\u914d\u7f6e"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/10\/mysql-replication-delay-cover.webp\" alt=\"MySQL \u4e3b\u4ece\u590d\u5236\u5ef6\u8fdf\u76d1\u63a7\u573a\u666f\uff1a\u673a\u67dc\u95f4\u7684\u6570\u636e\u540c\u6b65\" loading=\"lazy\" \/><\/p>\n<p>\u5982\u679c\u4f60\u5728\u76d1\u63a7\u91cc\u770b\u5230\u4ece\u5e93\u7684 <code>Seconds_Behind_Master<\/code> \u4e00\u8def\u6da8\u5230\u51e0\u767e\u79d2\uff0c\u4e1a\u52a1\u8bfb\u5230\u7684\u6570\u636e\u5374\u505c\u5728\u51e0\u5206\u949f\u524d\uff0c\u8fd9\u7bc7\u6587\u7ae0\u53ef\u4ee5\u5e2e\u52a9\u4f60\u628a\u5ef6\u8fdf\u7684\u771f\u5b9e\u6765\u6e90\u627e\u51fa\u6765\uff0c\u5e76\u89e3\u51b3\u6389\u5927\u90e8\u5206\u7531\u5355\u7ebf\u7a0b\u56de\u653e\u5f15\u8d77\u7684\u5806\u79ef\u95ee\u9898\u3002\u4e3b\u4ece\u590d\u5236\u5ef6\u8fdf\uff08Replication Lag\uff09\u662f MySQL \u9ad8\u53ef\u7528\u67b6\u6784\u91cc\u6700\u5e38\u89c1\u7684\u6545\u969c\u4fe1\u53f7\u4e4b\u4e00\uff1a\u4e3b\u5e93\u5199\u5165\u6b63\u5e38\uff0c\u4ece\u5e93\u5374\u8d8a\u843d\u8d8a\u8fdc\uff0c\u8bfb\u5199\u5206\u79bb\u573a\u666f\u4e0b\u7528\u6237\u4f1a\u76f4\u63a5\u8bfb\u5230\u65e7\u6570\u636e\u3002\u5f88\u591a\u4eba\u7b2c\u4e00\u53cd\u5e94\u662f\u7f51\u7edc\u6162\u6216\u4ece\u5e93\u914d\u7f6e\u4f4e\uff0c\u4f46\u5b9e\u9645\u6392\u969c\u65f6\uff0c\u771f\u6b63\u7684\u74f6\u9888\u66f4\u591a\u51fa\u5728 SQL \u7ebf\u7a0b\u7684\u56de\u653e\u80fd\u529b\u4e0a\u3002\u4e0b\u9762\u6211\u4eec\u6309\u7167\u5148\u770b\u61c2\u6307\u6807\u3001\u518d\u5b9a\u4f4d\u539f\u56e0\u3001\u6700\u540e\u8c03\u6574\u914d\u7f6e\u7684\u987a\u5e8f\u8d70\u5b8c\u6574\u4e2a\u6392\u67e5\u8def\u5f84\u3002\u5982\u679c\u4f60\u8fd8\u6ca1\u6709\u642d\u5efa\u8fc7\u4e3b\u4ece\u590d\u5236\uff0c\u5efa\u8bae\u5148\u9605\u8bfb <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/mysql-master-slave-replication-setup\/\">MySQL \u4e3b\u4ece\u590d\u5236\u642d\u5efa\u6559\u7a0b<\/a>\uff0c\u8dd1\u901a\u57fa\u7840\u73af\u5883\u540e\u518d\u56de\u6765\u5904\u7406\u5ef6\u8fdf\u95ee\u9898\u3002<\/p>\n<h2>\u4e00\u3001Seconds_Behind_Master \u5230\u5e95\u5728\u6d4b\u91cf\u4ec0\u4e48<\/h2>\n<p>\u6392\u67e5\u5ef6\u8fdf\u7684\u7b2c\u4e00\u6b65\uff0c\u662f\u641e\u6e05\u695a\u8fd9\u4e2a\u6570\u5b57\u7684\u771f\u5b9e\u542b\u4e49\u3002<code>Seconds_Behind_Master<\/code> \u5e76\u4e0d\u662f&#8221;\u4ece\u5e93\u6570\u636e\u6bd4\u4e3b\u5e93\u65e7\u4e86\u591a\u5c11\u79d2&#8221;\uff0c\u800c\u662f\u4ece\u5e93 SQL \u7ebf\u7a0b\u6b63\u5728\u56de\u653e\u7684\u4e8b\u4ef6\u7684\u65f6\u95f4\u6233\u4e0e\u4ece\u5e93\u5f53\u524d\u65f6\u95f4\u7684\u5dee\u503c\u3002\u7406\u89e3\u8fd9\u4e00\u70b9\uff0c\u76f4\u63a5\u51b3\u5b9a\u4f60\u4f1a\u5728\u54ea\u4e9b\u573a\u666f\u4e0b\u88ab\u8fd9\u4e2a\u6307\u6807\u8bef\u5bfc\u3002<\/p>\n<p>\u4e3e\u4e09\u4e2a\u5b9e\u9645\u4f1a\u9047\u5230\u7684\u4f8b\u5b50\uff1a<\/p>\n<ul>\n<li>\u4ece\u5e93\u6ca1\u6709\u65b0\u4e8b\u4ef6\u53ef\u56de\u653e\u65f6\uff0c\u8fd9\u4e2a\u503c\u663e\u793a\u4e3a 0\uff0c\u4f46\u4e3b\u5e93\u6b64\u65f6\u53ef\u80fd\u5df2\u7ecf\u6302\u4e86\u2014\u2014\u6ca1\u6709\u4e8b\u4ef6\u5230\u8fbe\uff0c\u4e0d\u4ee3\u8868\u6570\u636e\u662f\u65b0\u7684\u3002<\/li>\n<li>\u4e00\u6761\u5728\u4e3b\u5e93\u4e0a\u8dd1\u4e86 40 \u5206\u949f\u7684\u5927\u6279\u91cf <code>UPDATE<\/code> \u5199\u8fdb binlog \u540e\uff0c\u4ece\u5e93\u4e0a\u5bf9\u5e94\u7684\u4e8b\u4ef6\u540c\u6837\u5e26\u7740 40 \u5206\u949f\u524d\u7684\u65f6\u95f4\u6233\uff0c<code>Seconds_Behind_Master<\/code> \u4f1a\u77ac\u95f4\u8df3\u5230 2400 \u5de6\u53f3\uff0c\u4f46\u8fd9\u53ea\u662f\u56de\u653e\u8fdb\u884c\u4e2d\u7684\u6b63\u5e38\u8868\u73b0\u3002<\/li>\n<li>\u4e3b\u4ece\u670d\u52a1\u5668\u65f6\u949f\u4e0d\u4e00\u81f4\u65f6\uff0c\u8fd9\u4e2a\u503c\u4f1a\u6574\u4f53\u504f\u79fb\uff0c\u751a\u81f3\u51fa\u73b0\u8d1f\u6570\u3002<\/li>\n<\/ul>\n<p>\u6240\u4ee5\u6b63\u786e\u7684\u7528\u6cd5\u662f\u628a <code>SHOW SLAVE STATUS\\G<\/code> \u91cc\u7684\u591a\u4e2a\u5b57\u6bb5\u7ec4\u5408\u8d77\u6765\u770b\uff0c\u91cd\u70b9\u6838\u5bf9\uff1a<\/p>\n<ul>\n<li><code>Slave_IO_Running<\/code> \u548c <code>Slave_SQL_Running<\/code>\uff1a\u4e24\u4e2a\u7ebf\u7a0b\u5fc5\u987b\u90fd\u662f <code>Yes<\/code>\uff0c\u4efb\u4f55\u4e00\u4e2a\u4e0d\u662f <code>Yes<\/code> \u90fd\u8bf4\u660e\u590d\u5236\u5df2\u7ecf\u4e2d\u65ad\uff0c\u800c\u4e0d\u662f&#8221;\u5ef6\u8fdf&#8221;\u3002<\/li>\n<li><code>Master_Log_File<\/code> \u4e0e <code>Relay_Master_Log_File<\/code>\uff1a\u5982\u679c\u524d\u8005\u660e\u663e\u9886\u5148\uff0c\u8bf4\u660e IO \u7ebf\u7a0b\u62c9\u53d6\u6b63\u5e38\uff0c\u74f6\u9888\u5728 SQL \u7ebf\u7a0b\u56de\u653e\u4fa7\u3002<\/li>\n<li><code>Read_Master_Log_Pos<\/code> \u4e0e <code>Exec_Master_Log_Pos<\/code>\uff1a\u4e24\u4e2a\u4f4d\u7f6e\u70b9\u7684\u5dee\u503c\u5c31\u662f\u5c1a\u672a\u56de\u653e\u7684\u4e8b\u4ef6\u4f53\u91cf\uff0c\u5dee\u503c\u6301\u7eed\u6269\u5927\u5c31\u662f\u5ef6\u8fdf\u5728\u7d2f\u79ef\u3002<\/li>\n<\/ul>\n<p>\u4e00\u4e2a\u7b80\u5355\u7684\u5224\u65ad\u89c4\u5219\uff1aIO \u7ebf\u7a0b\u4f4d\u7f6e\u9886\u5148\u3001SQL \u7ebf\u7a0b\u4f4d\u7f6e\u843d\u540e\uff0c\u95ee\u9898\u51e0\u4e4e\u90fd\u5728\u4ece\u5e93\u56de\u653e\u4fa7\uff1b\u53cd\u8fc7\u6765\u624d\u9700\u8981\u53bb\u67e5\u4e3b\u5e93 binlog \u6216\u7f51\u7edc\u3002\u4e0b\u9762\u8fd9\u5f20\u56fe\u6982\u62ec\u4e86\u4e8b\u4ef6\u4ece\u4e3b\u5e93\u5230\u4ece\u5e93\u56de\u653e\u7684\u5b8c\u6574\u8def\u5f84\uff0c\u5ef6\u8fdf\u53ef\u80fd\u51fa\u73b0\u5728\u5176\u4e2d\u4efb\u4f55\u4e00\u6bb5\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/10\/mysql-replication-flow.webp\" alt=\"\u4e3b\u4ece\u590d\u5236\u4e8b\u4ef6\u6d41\u8f6c\u793a\u610f\uff1a\u4e3b\u5e93\u3001\u65e5\u5fd7\u4e0e\u56de\u653e\u7ebf\u7a0b\" loading=\"lazy\" \/><\/p>\n<h2>\u4e8c\u3001\u5b9a\u4f4d\u5ef6\u8fdf\u6765\u6e90\uff1a\u5927\u4e8b\u52a1\u8fd8\u662f\u5355\u7ebf\u7a0b\u56de\u653e<\/h2>\n<p>\u770b\u61c2\u6307\u6807\u4e4b\u540e\uff0c\u4e0b\u4e00\u6b65\u662f\u628a\u5ef6\u8fdf\u5f52\u56e0\u3002\u751f\u4ea7\u73af\u5883\u91cc\u4e5d\u6210\u4ee5\u4e0a\u7684\u5ef6\u8fdf\u6765\u81ea\u4e24\u7c7b\u95ee\u9898\uff1a\u4e3b\u5e93\u4ea7\u751f\u7684\u5927\u4e8b\u52a1\uff0c\u4ee5\u53ca\u4ece\u5e93\u9ed8\u8ba4\u7684\u5355\u7ebf\u7a0b\u56de\u653e\u3002\u4e24\u8005\u5904\u7406\u65b9\u5f0f\u5b8c\u5168\u4e0d\u540c\uff0c\u5148\u533a\u5206\u6e05\u695a\u518d\u52a8\u624b\u3002<\/p>\n<p>\u5148\u770b\u5927\u4e8b\u52a1\u3002\u5728\u4ece\u5e93\u4e0a\u6267\u884c\u4f1a\u8bdd\u5217\u8868\u67e5\u8be2\u5e76\u89c2\u5bdf Info \u5217\uff0c\u82e5\u56de\u653e\u7ebf\u7a0b\u957f\u65f6\u95f4\u505c\u5728\uff0c\u5927\u6982\u7387\u5c31\u662f\u4e3b\u5e93\u4e0a\u4e00\u6761\u5de8\u5927\u7684 <code>UPDATE<\/code> \u6216 <code>DELETE<\/code>\u2014\u2014\u8fd9\u7c7b\u4e8b\u4ef6\u5728\u4e3b\u5e93\u6267\u884c\u4e86\u591a\u4e45\uff0c\u4ece\u5e93\u5c31\u8981\u539f\u6837\u518d\u6267\u884c\u591a\u4e45\u3002\u5904\u7406\u601d\u8def\u662f\u5728\u6e90\u5934\u62c6\u5206\uff1a\u628a\u4e00\u6b21\u6027\u66f4\u65b0 500 \u4e07\u884c\u7684\u4efb\u52a1\u6539\u6210\u6bcf\u6279 5000 \u884c\u3001\u5faa\u73af\u6267\u884c\uff0c\u4e3b\u5e93\u6267\u884c\u65f6\u95f4\u4ece\u51e0\u5341\u5206\u949f\u964d\u5230\u51e0\u79d2\uff0c\u4ece\u5e93\u56de\u653e\u81ea\u7136\u8ddf\u5f97\u4e0a\u3002\u6162 SQL \u4e0d\u4ec5\u62d6\u57ae\u4e3b\u5e93\uff0c\u8fd8\u4f1a\u901a\u8fc7\u590d\u5236\u94fe\u6761\u653e\u5927\u6210\u4ece\u5e93\u5ef6\u8fdf\uff0c\u5177\u4f53\u5206\u6790\u89c1\u524d\u9762\u7684 <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/mysql-slow-query-analysis\/\">MySQL \u6162\u67e5\u8be2\u4f18\u5316\u5b9e\u6218<\/a>\u3002<\/p>\n<p>\u518d\u786e\u8ba4\u662f\u4e0d\u662f\u5355\u7ebf\u7a0b\u74f6\u9888\u3002MySQL 5.7 \u53ca\u4ee5\u524d\uff0c\u4ece\u5e93\u56de\u653e\u9ed8\u8ba4\u53ea\u6709\u4e00\u4e2a SQL \u7ebf\u7a0b\uff0c\u5373\u4f7f\u4e3b\u5e93\u662f 64 \u4e2a\u8fde\u63a5\u5e76\u53d1\u5199\u5165\uff0c\u4ece\u5e93\u4e5f\u53ea\u80fd\u9010\u6761\u4e32\u884c\u56de\u653e\u3002\u53ef\u4ee5\u7528\u4e0b\u9762\u8fd9\u6761\u547d\u4ee4\u5feb\u901f\u786e\u8ba4\u5f53\u524d\u72b6\u6001\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">\nSHOW VARIABLES LIKE 'slave_parallel_workers';\n<\/pre>\n<p>\u5982\u679c\u8fd4\u56de\u503c\u4e3a 0\uff0c\u800c\u4f60\u7684\u4e1a\u52a1\u9ad8\u5cf0\u671f\u4e3b\u5e93\u5199\u5165\u5e76\u53d1\u660e\u663e\u8f83\u9ad8\uff0c\u90a3\u4e48\u5355\u7ebf\u7a0b\u56de\u653e\u51e0\u4e4e\u53ef\u4ee5\u786e\u5b9a\u5c31\u662f\u5ef6\u8fdf\u6301\u7eed\u7d2f\u79ef\u7684\u4e3b\u56e0\u3002\u5224\u65ad\u4f9d\u636e\u53ef\u4ee5\u518d\u53e0\u52a0\u4e00\u6761\uff1a\u6267\u884c <code>SHOW ENGINE INNODB STATUS\\G<\/code> \u89c2\u5bdf\u56de\u653e\u4e8b\u52a1\u662f\u5426\u957f\u671f\u5355\u6761\u63a8\u8fdb\uff0c\u540c\u65f6\u4e3b\u5e93\u4fa7 <code>SHOW GLOBAL STATUS LIKE 'Com_commit'<\/code> \u663e\u793a\u6bcf\u79d2\u51e0\u5341\u6b21\u63d0\u4ea4\u2014\u2014\u8fd9\u79cd&#8221;\u4e3b\u5e93\u9ad8\u5e76\u53d1\u3001\u4ece\u5e93\u5355\u7ebf\u7a0b\u56de\u653e&#8221;\u7684\u526a\u5200\u5dee\uff0c\u6b63\u662f\u5e76\u884c\u590d\u5236\u8981\u89e3\u51b3\u7684\u95ee\u9898\u3002<\/p>\n<p>\u533a\u5206\u4e24\u7c7b\u95ee\u9898\u8fd8\u6709\u4e00\u4e2a\u6280\u5de7\uff1a\u5927\u4e8b\u52a1\u5bfc\u81f4\u7684\u5ef6\u8fdf\u662f\u9636\u8dc3\u5f0f\u7684\uff0c\u7a81\u7136\u98d9\u9ad8\u518d\u7f13\u6162\u6062\u590d\uff1b\u56de\u653e\u80fd\u529b\u4e0d\u8db3\u5bfc\u81f4\u7684\u5ef6\u8fdf\u662f\u659c\u5761\u5f0f\u7684\uff0c\u9ad8\u5cf0\u671f\u6301\u7eed\u4e0a\u6da8\u3001\u4f4e\u8c37\u671f\u7f13\u6162\u56de\u843d\u3002\u753b\u51fa\u76d1\u63a7\u66f2\u7ebf\u5c31\u80fd\u5206\u8fa8\u3002<\/p>\n<h2>\u4e09\u3001\u5e76\u884c\u590d\u5236\u914d\u7f6e\uff1a\u4ece\u5e93\u56de\u653e\u63d0\u901f\u7684\u5b8c\u6574\u6b65\u9aa4<\/h2>\n<p>\u786e\u8ba4\u74f6\u9888\u5728\u56de\u653e\u4fa7\u4e4b\u540e\uff0c\u5e76\u884c\u590d\u5236\u5c31\u662f\u6700\u76f4\u63a5\u7684\u89e3\u6cd5\u3002\u6309\u4e0b\u9762\u7684\u6b65\u9aa4\u914d\u7f6e\uff0c\u53ef\u4ee5\u62ff\u5230\u6bd4\u8f83\u7406\u60f3\u7684\u56de\u653e\u541e\u5410\u3002<\/p>\n<p>\u7b2c\u4e00\u6b65\uff0c\u5728\u4ece\u5e93\u7684 <code>my.cnf<\/code> \u4e2d\u52a0\u5165\u6838\u5fc3\u53c2\u6570\u3002<code>slave_parallel_workers<\/code> \u662f\u56de\u653e\u7ebf\u7a0b\u6570\u91cf\uff0c\u7ecf\u9a8c\u503c\u4e3a CPU \u6838\u6570\u7684\u4e00\u534a\uff0c16 \u6838\u4ece\u5e93\u5148\u8bbe 8\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">\n[mysqld]\nslave_parallel_workers = 8\nslave_parallel_type = LOGICAL_CLOCK\nslave_preserve_commit_order = 1\n<\/pre>\n<p><code>slave_parallel_type = LOGICAL_CLOCK<\/code> \u8ba9\u540c\u4e00\u7ec4\u63d0\u4ea4\u7684\u4e8b\u52a1\u5e76\u884c\u56de\u653e\uff1b<code>slave_preserve_commit_order = 1<\/code> \u4fdd\u8bc1\u4ece\u5e93\u63d0\u4ea4\u987a\u5e8f\u4e0e\u4e3b\u5e93\u4e00\u81f4\uff0c\u907f\u514d\u53ea\u8bfb\u4e1a\u52a1\u8bfb\u5230\u4e71\u5e8f\u6570\u636e\u3002MySQL 8.0 \u4e0b\u518d\u5728\u4e3b\u4ece\u4e24\u4fa7\u540c\u65f6\u6253\u5f00 WRITESET\uff0c\u5e76\u884c\u5ea6\u8fd8\u80fd\u8fdb\u4e00\u6b65\u63d0\u5347\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">\ntransaction_write_set_extraction = XXHASH64\nbinlog_transaction_dependency_tracking = WRITESET\n<\/pre>\n<p>\u7b2c\u4e8c\u6b65\uff0c\u5728\u7ebf\u751f\u6548\u5e76\u9a8c\u8bc1\u3002\u4e0d\u91cd\u542f\u5b9e\u4f8b\u65f6\u53ef\u7528 <code>SET GLOBAL<\/code> \u52a8\u6001\u8c03\u6574\u2014\u2014\u6ce8\u610f\u5fc5\u987b\u5148\u505c\u6389 SQL \u7ebf\u7a0b\u518d\u4fee\u6539 worker \u6570\u91cf\uff0c\u5426\u5219\u4f1a\u62a5\u9519\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">\nSTOP SLAVE SQL_THREAD;\nSET GLOBAL slave_parallel_workers = 8;\nSET GLOBAL slave_parallel_type = 'LOGICAL_CLOCK';\nSET GLOBAL slave_preserve_commit_order = 1;\nSTART SLAVE SQL_THREAD;\n<\/pre>\n<p>\u7b2c\u4e09\u6b65\uff0c\u786e\u8ba4\u5e76\u884c\u771f\u6b63\u8d77\u6548\u3002\u91cd\u542f\u590d\u5236\u540e\u89c2\u5bdf <code>SHOW SLAVE STATUS\\G<\/code> \u4e2d <code>Exec_Master_Log_Pos<\/code> \u7684\u63a8\u8fdb\u901f\u5ea6\uff0c\u6216\u67e5\u8be2 <code>performance_schema.replication_applier_status_by_worker<\/code> \u786e\u8ba4\u591a\u4e2a worker \u90fd\u5206\u5230\u4e86\u4e8b\u4ef6\u3002\u53c2\u8003\u91cf\u7ea7\uff1a8 \u6838\u4ece\u5e93\u5355\u7ebf\u7a0b\u56de\u653e\u6bcf\u79d2\u63a8\u8fdb\u51e0\u767e\u4e2a\u4e8b\u52a1\uff0c\u5f00 8 \u4e2a\u5e76\u884c worker \u540e\u901a\u5e38\u80fd\u5230\u6570\u5343\u4e2a\uff0c\u9ad8\u5cf0\u671f\u5806\u79ef\u7684\u5ef6\u8fdf\u4ece\u5341\u51e0\u5206\u949f\u7f29\u77ed\u5230\u51e0\u5341\u79d2\u5185\u8ffd\u5e73\u3002\u5e76\u884c\u5ea6\u4e5f\u4e0d\u662f\u8d8a\u5927\u8d8a\u597d\u2014\u2014worker \u8d85\u8fc7 CPU \u6838\u6570\u540e\u4e0a\u4e0b\u6587\u5207\u6362\u53cd\u800c\u62c9\u4f4e\u541e\u5410\uff0c\u52a1\u5fc5\u7528\u771f\u5b9e\u6d41\u91cf\u89c2\u5bdf\u540e\u518d\u5fae\u8c03\u3002<\/p>\n<p>\u5f00\u542f\u524d\u540e\u7684\u5dee\u5f02\u89c1\u4e0b\u9762\u7684\u5bf9\u6bd4\u56fe\uff1a\u540c\u6837\u7684\u5199\u5165\u6d41\u91cf\uff0c\u5355\u7ebf\u7a0b\u56de\u653e\u4fa7\u6301\u7eed\u5806\u79ef\uff0c\u5e76\u884c\u590d\u5236\u4fa7\u5feb\u901f\u6d88\u5316\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/10\/mysql-replication-lag-comparison.webp\" alt=\"\u5355\u7ebf\u7a0b\u56de\u653e\u4e0e\u5e76\u884c\u590d\u5236\u7684\u56de\u653e\u6548\u679c\u5bf9\u6bd4\" loading=\"lazy\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/10\/mysql-parallel-worker-applier.webp\" alt=\"\u4ece\u5e93\u5e76\u884c\u56de\u653e\uff1a\u591a\u4e2a\u5de5\u4f5c\u7ebf\u7a0b\u540c\u65f6\u5904\u7406\u4e8b\u52a1\" loading=\"lazy\" \/><\/p>\n<h2>\u56db\u3001\u5e76\u884c\u590d\u5236\u89e3\u51b3\u4e0d\u4e86\u7684\u5ef6\u8fdf\uff1a\u53e6\u5916\u4e09\u4e2a\u5e38\u89c1\u539f\u56e0<\/h2>\n<p>\u5e76\u884c\u590d\u5236\u8c03\u6574\u5230\u4f4d\u540e\uff0c\u4ecd\u6709\u4e09\u7c7b\u5ef6\u8fdf\u9700\u8981\u5355\u72ec\u5904\u7406\u3002<\/p>\n<p>\u7b2c\u4e00\u7c7b\u662f\u4ece\u5e93\u786c\u4ef6\u8d44\u6e90\u4e0d\u8db3\u3002\u56de\u653e\u4e5f\u662f\u771f\u5b9e\u7684\u5199\u64cd\u4f5c\uff1a\u6bcf\u4e2a\u4e8b\u52a1\u90fd\u8981\u5728\u4ece\u5e93\u4e0a\u91cd\u65b0\u6267\u884c\u3001\u5199 redo log\u3001\u5237\u810f\u9875\uff0c\u5982\u679c\u4ece\u5e93\u7684\u78c1\u76d8\u5199\u5165\u80fd\u529b\u660e\u663e\u5f31\u4e8e\u4e3b\u5e93\uff0cworker \u52a0\u5f97\u518d\u591a\u4e5f\u8ffd\u4e0d\u4e0a\u3002\u5224\u65ad\u65b9\u6cd5\u662f\u5728\u5ef6\u8fdf\u51fa\u73b0\u65f6\u6267\u884c <code>iostat -x 1<\/code>\uff0c\u82e5 <code>%util<\/code> \u957f\u671f\u63a5\u8fd1 100%\uff0c\u74f6\u9888\u5c31\u5728\u78c1\u76d8\uff0c\u6700\u6709\u6548\u7684\u624b\u6bb5\u662f\u628a\u4ece\u5e93\u8fc1\u79fb\u5230 IOPS \u66f4\u9ad8\u7684\u670d\u52a1\u5668\uff0c\u6211\u4eec\u5728 <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/dedicated-server-stable-workload-return\/\">\u72ec\u7acb\u670d\u52a1\u5668\u627f\u8f7d\u9ad8\u8d1f\u8f7d\u6570\u636e\u5e93\u7684\u5b9e\u8df5<\/a> \u4e2d\u5bf9\u6bd4\u8fc7\u4e0d\u540c\u78c1\u76d8\u914d\u7f6e\u7684\u5dee\u5f02\u3002<\/p>\n<p>\u7b2c\u4e8c\u7c7b\u662f\u8868\u7f3a\u5c11\u4e3b\u952e\u6216\u552f\u4e00\u7d22\u5f15\u3002\u57fa\u4e8e\u884c\u683c\u5f0f\uff08ROW\uff09\u7684 binlog \u56de\u653e\u65f6\uff0c\u6ca1\u6709\u4e3b\u952e\u610f\u5473\u7740\u4ece\u5e93\u6bcf\u540c\u6b65\u4e00\u884c\u90fd\u8981\u505a\u5168\u8868\u626b\u63cf\uff0c\u4e00\u6761\u5927\u8868\u4e0a\u7684 <code>UPDATE<\/code> \u53ef\u80fd\u628a\u56de\u653e\u62d6\u6162\u4e0a\u5343\u500d\u3002\u7528\u4e0b\u9762\u7684\u8bed\u53e5\u627e\u51fa\u65e0\u4e3b\u952e\u7684\u8868\u5e76\u8865\u4e0a\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">\nSELECT TABLE_SCHEMA, TABLE_NAME\nFROM information_schema.TABLES t\nWHERE TABLE_SCHEMA NOT IN ('mysql','information_schema','performance_schema','sys')\nAND NOT EXISTS (SELECT 1 FROM information_schema.TABLE_CONSTRAINTS c\nWHERE c.TABLE_SCHEMA = t.TABLE_SCHEMA AND c.TABLE_NAME = t.TABLE_NAME\nAND c.CONSTRAINT_TYPE IN ('PRIMARY KEY','UNIQUE'));\n<\/pre>\n<p>\u7b2c\u4e09\u7c7b\u662f\u4ece\u5e93\u4e0a\u7684\u67e5\u8be2\u4e89\u62a2\u3002\u8bfb\u5199\u5206\u79bb\u67b6\u6784\u4e0b\uff0c\u4ece\u5e93\u540c\u65f6\u627f\u62c5\u56de\u653e\u548c\u5bf9\u5916\u67e5\u8be2\uff0c\u4e00\u6761\u5931\u63a7\u7684\u6162\u67e5\u8be2\u53ef\u80fd\u628a CPU \u548c\u7f13\u51b2\u6c60\u5403\u6ee1\uff0c\u56de\u653e\u7ebf\u7a0b\u53ea\u80fd\u6392\u961f\u3002\u89e3\u51b3\u529e\u6cd5\u662f\u7ed9\u4ece\u5e93\u7684\u4e1a\u52a1\u8d26\u53f7\u8bbe\u7f6e\u67e5\u8be2\u8d85\u65f6\uff08<code>max_execution_time<\/code>\uff09\uff0c\u5e76\u628a\u5206\u6790\u7c7b\u67e5\u8be2\u653e\u5230\u5355\u72ec\u7684\u62a5\u8868\u4ece\u5e93\u4e0a\uff0c\u6162\u67e5\u8be2\u5b9a\u4f4d\u65b9\u6cd5\u53ef\u4ee5\u53c2\u8003 <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/mysql-slow-query-analysis\/\">MySQL \u6162\u67e5\u8be2\u4f18\u5316\u5b9e\u6218<\/a>\u3002<\/p>\n<h2>\u4e94\u3001\u603b\u7ed3\u4e0e\u884c\u52a8\u5efa\u8bae<\/h2>\n<p>\u6700\u540e\u628a\u6392\u67e5\u8def\u5f84\u6536\u62e2\u6210\u53ef\u843d\u5730\u7684\u6e05\u5355\uff0c\u5efa\u8bae\u6309\u987a\u5e8f\u6267\u884c\uff1a<\/p>\n<ul>\n<li>\u5148\u7ec4\u5408\u67e5\u770b <code>SHOW SLAVE STATUS\\G<\/code> \u7684\u7ebf\u7a0b\u72b6\u6001\u548c\u65e5\u5fd7\u4f4d\u7f6e\u5dee\u503c\uff0c\u533a\u5206\u590d\u5236\u4e2d\u65ad\u4e0e\u5ef6\u8fdf\u7d2f\u79ef\u3002<\/li>\n<li>\u7528\u76d1\u63a7\u66f2\u7ebf\u5224\u65ad\u5ef6\u8fdf\u5f62\u6001\uff1a\u9636\u8dc3\u5f0f\u5c16\u5cf0\u67e5\u5927\u4e8b\u52a1\uff0c\u659c\u5761\u5f0f\u4e0a\u6da8\u68c0\u67e5 <code>slave_parallel_workers<\/code> \u662f\u5426\u4e3a 0\u3002<\/li>\n<li>\u6309&#8221;8 worker + LOGICAL_CLOCK + preserve_commit_order&#8221;\u7ec4\u5408\u5f00\u542f\u5e76\u884c\u590d\u5236\uff0cMySQL 8.0 \u518d\u53e0\u52a0 WRITESET\u3002<\/li>\n<li>\u4ecd\u6709\u6b8b\u4f59\u5ef6\u8fdf\u65f6\uff0c\u4f9d\u6b21\u6392\u67e5\u4ece\u5e93\u78c1\u76d8 IO\u3001\u65e0\u4e3b\u952e\u8868\u548c\u67e5\u8be2\u4e89\u62a2\u3002<\/li>\n<\/ul>\n<p>\u603b\u7ed3\u4e00\u4e0b\uff1a<code>Seconds_Behind_Master<\/code> \u544a\u8bc9\u4f60\u5ef6\u8fdf\u4e86\u591a\u4e45\uff0c\u8981\u89e3\u51b3\u5ef6\u8fdf\u5219\u5fc5\u987b\u627e\u5230\u5361\u5728\u54ea\u4e00\u6bb5\u2014\u2014\u628a\u4ece\u5e93\u4ece\u5355\u7ebf\u7a0b\u56de\u653e\u5347\u7ea7\u4e3a\u5e76\u884c\u590d\u5236\uff0c\u914d\u5408\u6e90\u5934\u62c6\u5206\u5927\u4e8b\u52a1\uff0c\u7edd\u5927\u591a\u6570\u573a\u666f\u90fd\u80fd\u628a\u5ef6\u8fdf\u7a33\u5b9a\u5728\u79d2\u7ea7\u3002\u5982\u679c\u4f60\u6b63\u5728\u4e3a\u4ece\u5e93\u786c\u4ef6\u6027\u80fd\u4e0d\u8db3\u5bfc\u81f4\u7684\u5ef6\u8fdf\u53d1\u6101\uff0c\u53ef\u4ee5\u8003\u8651\u628a\u6570\u636e\u5e93\u8fc1\u79fb\u5230 <a href=\"https:\/\/cn.hostease.com\/dedicated-server\/\">Hostease \u72ec\u7acb\u670d\u52a1\u5668<\/a>\uff0c\u6216\u7528 <a href=\"https:\/\/cn.hostease.com\/vps\/\">VPS\uff08\u865a\u62df\u4e13\u7528\u670d\u52a1\u5668\uff09<\/a> \u627f\u8f7d\u53ea\u8bfb\u526f\u672c\uff1b\u6bcf\u6b21\u53d8\u66f4\u524d\u4e5f\u522b\u5fd8\u4e86\u53c2\u8003 <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/database-backup-strategy-guide\/\">\u6570\u636e\u5e93\u5907\u4efd\u7b56\u7565\u6307\u5357<\/a> \u505a\u597d\u5feb\u7167\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8bb2\u89e3\u5982\u4f55\u901a\u8fc7 Seconds_Behind_Master \u5b9a\u4f4d MySQL \u4e3b\u4ece\u590d\u5236\u5ef6\u8fdf\u7684\u771f\u5b9e\u6765\u6e90\uff0c\u5e76\u7ed9\u51fa\u4ece\u5e93\u5e76\u884c\u590d\u5236\uff08slave_parallel_workers\uff09\u7684\u5b8c\u6574\u914d\u7f6e\u4e0e\u9a8c\u8bc1\u6b65\u9aa4\u3002<\/p>\n","protected":false},"author":2,"featured_media":34009,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3822],"tags":[545,5088,5385,5386,5384],"class_list":["post-34013","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides","tag-mysql","tag-secondsbehindmaster","tag-slaveparallelworkers","tag-5386","tag-5384"],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/10\/mysql-replication-delay-cover.webp","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/34013","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/comments?post=34013"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/34013\/revisions"}],"predecessor-version":[{"id":34374,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/34013\/revisions\/34374"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media\/34009"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media?parent=34013"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/categories?post=34013"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/tags?post=34013"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}