{"id":26185,"date":"2025-10-20T14:40:40","date_gmt":"2025-10-20T06:40:40","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-tw\/how-to-fix-mysql-connection-issues-on-tokyo-servers\/"},"modified":"2025-10-20T14:46:48","modified_gmt":"2025-10-20T06:46:48","slug":"how-to-fix-mysql-connection-issues-on-tokyo-servers","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/how-to-fix-mysql-connection-issues-on-tokyo-servers\/","title":{"rendered":"\u5982\u4f55\u89e3\u6c7a\u6771\u4eac\u4f3a\u670d\u5668\u4e0a\u7684MySQL\u9023\u63a5\u554f\u984c"},"content":{"rendered":"<p>\u8655\u7406<a href=\"https:\/\/www.varidata.com\/zh-tw\/server\/hk\/cn2\/\" target=\"_blank\">\u6771\u4eac\u4f3a\u670d\u5668<\/a>\u4e0a\u7684<a href=\"https:\/\/www.varidata.com\/zh-tw\/blog-tc\/connect-japan-server-to-hong-kong-database-a-tech-guide\/\" target=\"_blank\">MySQL<\/a>\u9023\u63a5\u554f\u984c\u662f\u7ba1\u7406\u65e5\u672c\u4f3a\u670d\u5668\u79df\u7528\u57fa\u790e\u8a2d\u65bd\u4e2d\u7279\u5225\u5177\u6709\u6311\u6230\u6027\u7684\u4e00\u500b\u65b9\u9762\u3002\u7121\u8ad6\u60a8\u662f\u7d93\u71df\u9ad8\u6d41\u91cf\u96fb\u5546\u5e73\u53f0\u3001\u7ba1\u7406\u5167\u5bb9\u5206\u767c\u7db2\u8def\uff0c\u9084\u662f\u7dad\u8b77\u4f01\u696d\u61c9\u7528\u7a0b\u5f0f\uff0c\u7a69\u5b9a\u7684\u8cc7\u6599\u5eab\u9023\u63a5\u5c0d\u696d\u52d9\u71df\u904b\u90fd\u81f3\u95dc\u91cd\u8981\u3002\u672c\u7d9c\u5408\u6307\u5357\u6e90\u81ea\u591a\u5e74\u5728\u65e5\u672c\u6578\u64da\u4e2d\u5fc3\u7684\u5be6\u8e10\u7d93\u9a57\uff0c\u65e8\u5728\u5e6b\u52a9\u60a8\u6709\u6548\u8a3a\u65b7\u3001\u89e3\u6c7a\u548c\u9810\u9632MySQL\u9023\u63a5\u554f\u984c\u3002\u6211\u5011\u5c07\u63a2\u8a0e\u5e38\u898b\u548c\u6771\u4eac\u7279\u6709\u7684\u6311\u6230\uff0c\u70ba\u60a8\u63d0\u4f9b\u5728\u5be6\u969b\u5834\u666f\u4e2d\u884c\u4e4b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2><strong>\u5e38\u898bMySQL\u9023\u63a5\u932f\u8aa4\u6a21\u5f0f<\/strong><\/h2>\n<p>\u4e86\u89e3\u932f\u8aa4\u6a21\u5f0f\u5c0d\u65bc\u9ad8\u6548\u6545\u969c\u6392\u67e5\u81f3\u95dc\u91cd\u8981\u3002\u5728\u6771\u4eac\u4f3a\u670d\u5668\u74b0\u5883\u4e2d\uff0c\u6211\u5011\u7d93\u5e38\u9047\u5230\u5e7e\u7a2e\u4e0d\u540c\u985e\u578b\u7684\u9023\u63a5\u554f\u984c\uff0c\u6bcf\u7a2e\u90fd\u9700\u8981\u7279\u5b9a\u7684\u89e3\u6c7a\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li>\u932f\u8aa42013\uff1a\u67e5\u8a62\u671f\u9593\u8207MySQL\u4f3a\u670d\u5668\u65b7\u958b\u9023\u63a5 &#8211; \u901a\u5e38\u7531\u7db2\u8def\u4e0d\u7a69\u5b9a\u6216\u8d85\u6642\u8a2d\u5b9a\u672a\u8003\u616e\u8de8\u5340\u57df\u8a2d\u7f6e\u4e2d\u5178\u578b\u7684\u9ad8\u5ef6\u9072\u9023\u63a5\u5c0e\u81f4<\/li>\n<li>\u932f\u8aa41045\uff1a\u62d2\u7d55\u4f7f\u7528\u8005\u5b58\u53d6 &#8211; \u5728\u5b89\u5168\u66f4\u65b0\u5f8c\u6216\u4e3b\u6a5f\u540d\u7a31\u89e3\u6790\u672a\u6b63\u78ba\u914d\u7f6e\u65e5\u6587\u5b57\u5143\u7de8\u78bc\u6642\u7d93\u5e38\u51fa\u73fe<\/li>\n<li>\u932f\u8aa41129\uff1a\u7531\u65bc\u591a\u6b21\u9023\u63a5\u932f\u8aa4\u4e3b\u6a5f\u88ab\u963b\u6b62 &#8211; \u5728DDoS\u4e8b\u4ef6\u671f\u9593\u6216\u61c9\u7528\u7a0b\u5f0f\u672a\u80fd\u9ad8\u6548\u8655\u7406\u9023\u63a5\u6c60\u6642\u5e38\u898b<\/li>\n<li>\u932f\u8aa41226\uff1a\u4f7f\u7528\u8005\u8d85\u904emax_user_connections\u9650\u5236 &#8211; \u901a\u5e38\u5728\u6d41\u91cf\u9ad8\u5cf0\u671f\u6216\u9023\u63a5\u9650\u5236\u672a\u91dd\u5c0d\u4e9e\u6d32\u9ad8\u5cf0\u4f7f\u7528\u6a21\u5f0f\u6700\u4f73\u5316\u6642\u767c\u751f<\/li>\n<li>\u932f\u8aa42003\uff1a\u7121\u6cd5\u9023\u63a5\u5230MySQL\u4f3a\u670d\u5668 &#8211; \u901a\u5e38\u8207\u9632\u706b\u7246\u914d\u7f6e\u6216\u65e5\u672cISP\u7279\u6709\u7684\u7db2\u8def\u8def\u7531\u554f\u984c\u6709\u95dc<\/li>\n<\/ul>\n<h2><strong>\u521d\u59cb\u8a3a\u65b7\u6b65\u9a5f<\/strong><\/h2>\n<p>\u5728\u6392\u67e5\u6771\u4eac\u4f3a\u670d\u5668\u7684MySQL\u9023\u63a5\u554f\u984c\u6642\uff0c\u5fc5\u9808\u9075\u5faa\u8003\u616e\u5230\u672c\u5730\u57fa\u790e\u8a2d\u65bd\u7279\u9ede\u7684\u7cfb\u7d71\u65b9\u6cd5\uff1a<\/p>\n<ol>\n<li>\u9a57\u8b49\u7db2\u8def\u9023\u63a5\uff1a\n<pre>ping your-mysql-host\r\ntelnet your-mysql-host 3306\r\ntraceroute your-mysql-host\r\nnetstat -tupln | grep mysql<\/pre>\n<p>\u7279\u5225\u6ce8\u610f\u65e5\u672c\u5de5\u4f5c\u6642\u9593\uff089:00-18:00 JST\uff09\u7684\u5ef6\u9072\u6a21\u5f0f<\/p>\n<\/li>\n<li>\u6aa2\u67e5MySQL\u670d\u52d9\u72c0\u614b\uff1a\n<pre>systemctl status mysql\r\njournalctl -u mysql --since \"1 hour ago\"\r\nmysql -V\r\nshow global status like '%connect%';<\/pre>\n<\/li>\n<li>\u76e3\u63a7\u7cfb\u7d71\u8cc7\u6e90\uff1a\n<pre>top -c\r\niostat -xz 1\r\nvmstat 1\r\nfree -m<\/pre>\n<p>\u67e5\u627e\u8207\u4e9e\u592a\u5730\u5340\u9ad8\u5cf0\u6642\u6bb5\u76f8\u95dc\u7684\u6a21\u5f0f<\/p>\n<\/li>\n<\/ol>\n<h2><strong>\u7db2\u8def\u5c64\u8abf\u67e5<\/strong><\/h2>\n<p>\u65e5\u672c\u6578\u64da\u4e2d\u5fc3\u901a\u5e38\u5177\u6709\u7368\u7279\u7684\u7db2\u8def\u67b6\u69cb\u548c\u5b89\u5168\u5be6\u65bd\u65b9\u6848\uff0c\u9700\u8981\u7279\u5225\u95dc\u6ce8\u3002\u4ee5\u4e0b\u662f\u7db2\u8def\u5c64\u9762\u6545\u969c\u6392\u67e5\u7684\u8a73\u7d30\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li>\u9632\u706b\u7246\u914d\u7f6e\u7a3d\u6838\uff1a\n<pre>sudo iptables -L -n | grep 3306\r\nsudo ufw status verbose\r\nsudo csf -l<\/pre>\n<p>\u78ba\u4fdd\u898f\u5247\u540c\u6642\u652f\u63f4IPv4\u548cIPv6\u6d41\u91cf\uff0c\u56e0\u70ba\u65e5\u672c\u7db2\u8def\u5927\u91cf\u4f7f\u7528IPv6<\/p>\n<\/li>\n<li>\u7db2\u8def\u6548\u80fd\u5206\u6790\uff1a\n<pre>mtr -n your-mysql-host\r\niperf3 -c your-mysql-host\r\ntcpdump -i any port 3306 -w mysql_traffic.pcap<\/pre>\n<\/li>\n<li>DNS\u89e3\u6790\u9a57\u8b49\uff1a\n<pre>dig +short your-mysql-host\r\nhost your-mysql-host\r\nnslookup your-mysql-host<\/pre>\n<p>\u6aa2\u67e5\u900f\u904e\u65e5\u672cDNS\u4f3a\u670d\u5668\u7684\u6b63\u78ba\u89e3\u6790<\/p>\n<\/li>\n<\/ul>\n<h2><strong>\u914d\u7f6e\u6700\u4f73\u5316<\/strong><\/h2>\n<p>\u70ba\u4e86\u5728\u6771\u4eac\u4f3a\u670d\u5668\u74b0\u5883\u4e2d\u7372\u5f97\u6700\u4f73\u6548\u80fd\uff0c\u60a8\u7684MySQL\u914d\u7f6e\u9700\u8981\u4ed4\u7d30\u8abf\u512a\u3002\u4ee5\u4e0b\u662f\u95dc\u9375\u53c3\u6578\u7684\u8a73\u7d30\u8aaa\u660e\uff1a<\/p>\n<pre>\r\n# \u9023\u63a5\u7ba1\u7406\r\nmax_connections = 1000\r\nmax_user_connections = 500\r\nwait_timeout = 600\r\ninteractive_timeout = 600\r\nconnect_timeout = 10\r\n\r\n# \u7de9\u885d\u5340\u8a2d\u7f6e\r\ninnodb_buffer_pool_size = 12G\r\ninnodb_buffer_pool_instances = 8\r\nkey_buffer_size = 256M\r\nmax_allowed_packet = 16M\r\n\r\n# \u57f7\u884c\u7dd2\u7ba1\u7406\r\nthread_cache_size = 100\r\nthread_stack = 256K\r\ninnodb_thread_concurrency = 16\r\n\r\n# \u7db2\u8def\u8a2d\u7f6e\r\nbind-address = 0.0.0.0\r\nmax_connect_errors = 100000\r\nskip-name-resolve\r\n<\/pre>\n<p>\u9019\u4e9b\u8a2d\u7f6e\u5c08\u9580\u91dd\u5c0d\u65e5\u672c\u4f3a\u670d\u5668\u79df\u7528\u4e2d\u5fc3\u5e38\u898b\u7684\u9ad8\u541e\u5410\u91cf\u74b0\u5883\u9032\u884c\u4e86\u6700\u4f73\u5316\u3002\u60a8\u61c9\u8a72\u6839\u64da\u4f3a\u670d\u5668\u53ef\u7528\u8cc7\u6e90\u8abf\u6574\u6578\u503c\uff1a<\/p>\n<ul>\n<li>\u5c0d\u65bc32GB RAM\u4f3a\u670d\u5668\uff1a\u5c0760-70%\u5206\u914d\u7d66innodb_buffer_pool_size<\/li>\n<li>\u5c0d\u65bc\u9ad8\u4f75\u767c\u61c9\u7528\uff1a\u589e\u52a0thread_cache_size<\/li>\n<li>\u5c0d\u65bc\u7db2\u8def\u7a69\u5b9a\u6027\uff1a\u6839\u64da\u7db2\u8def\u5ef6\u9072\u8abf\u6574connect_timeout<\/li>\n<\/ul>\n<h2><strong>\u6548\u80fd\u8abf\u512a<\/strong><\/h2>\n<p>\u6700\u4f73\u5316\u6771\u4eac\u4f3a\u670d\u5668MySQL\u6548\u80fd\u9700\u8981\u8003\u616e\u672c\u5730\u6d41\u91cf\u6a21\u5f0f\u548c\u57fa\u790e\u8a2d\u65bd\u7279\u9ede\u7684\u591a\u65b9\u9762\u65b9\u6cd5\uff1a<\/p>\n<ol>\n<li>\u9023\u63a5\u6c60\u5be6\u4f5c\uff1a\n<ul>\n<li>ProxySQL\u914d\u7f6e\uff1a\n<pre>\r\nmysql_servers:\r\n{\r\n    hostname: \"backend-mysql\"\r\n    port: 3306\r\n    hostgroup: 1\r\n    max_connections: 2000\r\n    max_replication_lag: 5\r\n}\r\n                <\/pre>\n<\/li>\n<li>\u9023\u63a5\u6c60\u5927\u5c0f\u8a2d\u7f6e\uff1a\n<pre>\r\nthread_pool_size = 16\r\nthread_pool_max_threads = 1000\r\nthread_pool_idle_timeout = 60\r\n                <\/pre>\n<\/li>\n<li>\u76e3\u63a7\u6307\u6a19\uff1a\n<pre>\r\nSHOW STATUS LIKE 'Threads_%';\r\nSHOW PROCESSLIST;\r\nSHOW STATUS LIKE 'Connection%';\r\n                <\/pre>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u67e5\u8a62\u6700\u4f73\u5316\u7b56\u7565\uff1a\n<ul>\n<li>\u5be6\u4f5c\u5e36\u6709\u9069\u7576\u5931\u6548\u8655\u7406\u7684\u67e5\u8a62\u5feb\u53d6<\/li>\n<li>\u4f7f\u7528EXPLAIN ANALYZE\u9032\u884c\u67e5\u8a62\u6548\u80fd\u5206\u6790<\/li>\n<li>\u5b9a\u671f\u9032\u884c\u7d22\u5f15\u7dad\u8b77\u548c\u6700\u4f73\u5316<\/li>\n<li>\u6839\u64da\u5b58\u53d6\u6a21\u5f0f\u5c0d\u5927\u578b\u8868\u9032\u884c\u5206\u5272<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><strong>\u76e3\u63a7\u548c\u9810\u9632<\/strong><\/h2>\n<p>\u5728\u6771\u4eac\u6578\u64da\u4e2d\u5fc3\u5be6\u65bd\u5f37\u5927\u7684\u76e3\u63a7\u7cfb\u7d71\u5c0d\u7dad\u6301MySQL\u7a69\u5b9a\u904b\u884c\u81f3\u95dc\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u5168\u9762\u7684\u76e3\u63a7\u7b56\u7565\uff1a<\/p>\n<ul>\n<li>\u6307\u6a19\u6536\u96c6\u548c\u8996\u89ba\u5316\uff1a\n<pre>\r\n# Prometheus MySQL\u532f\u51fa\u5668\u914d\u7f6e\r\nglobal:\r\n  scrape_interval: 15s\r\nscrape_configs:\r\n  - job_name: 'mysql'\r\n    static_configs:\r\n      - targets: ['localhost:9104']\r\n\r\n# Grafana\u5100\u8868\u677f\u6307\u6a19\r\n- MySQL\u9023\u63a5\u6578\uff08\u7576\u524d\u3001\u6700\u5927\u3001\u5931\u6557\uff09\r\n- \u67e5\u8a62\u56de\u61c9\u6642\u9593\r\n- \u7de9\u885d\u6c60\u5229\u7528\u7387\r\n- InnoDB\u6307\u6a19\r\n- \u7db2\u8def\u6d41\u91cf\u6a21\u5f0f\r\n        <\/pre>\n<\/li>\n<li>\u8b66\u5831\u914d\u7f6e\uff1a\n<pre>\r\n# \u8b66\u5831\u898f\u5247\u793a\u4f8b\r\ngroups:\r\n- name: MySQLAlerts\r\n  rules:\r\n  - alert: HighConnectionCount\r\n    expr: mysql_global_status_threads_connected > 800\r\n    for: 5m\r\n    labels:\r\n      severity: warning\r\n    annotations:\r\n      description: \"\u9023\u63a5\u6578\u8d85\u904emax_connections\u768480%\"\r\n        <\/pre>\n<\/li>\n<li>\u6548\u80fd\u8da8\u52e2\u5206\u6790\uff1a\n<ul>\n<li>\u6bcf\u65e5\u9ad8\u5cf0\u4f7f\u7528\u6a21\u5f0f\uff08\u901a\u5e38\u572810:00-16:00 JST\uff09<\/li>\n<li>\u7528\u65bc\u5bb9\u91cf\u898f\u5283\u7684\u9031\u8da8\u52e2<\/li>\n<li>\u7528\u65bc\u64f4\u5c55\u6c7a\u7b56\u7684\u6708\u589e\u9577\u6a21\u5f0f<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2><strong>\u6771\u4eac\u4f3a\u670d\u5668\u74b0\u5883\u6700\u4f73\u5be6\u52d9<\/strong><\/h2>\n<p>\u5728\u65e5\u672c\u6578\u64da\u4e2d\u5fc3\u71df\u904bMySQL\u9700\u8981\u7279\u5b9a\u7684\u8003\u616e\u548c\u6700\u4f73\u5316\uff1a<\/p>\n<ol>\n<li>\u5730\u7406\u5206\u5e03\u7b56\u7565\uff1a\n<ul>\n<li>\u4e3b\u4f3a\u670d\u5668\u914d\u7f6e\uff1a\n<pre>\r\nserver-id = 1\r\nlog_bin = \/var\/log\/mysql\/mysql-bin.log\r\nbinlog_format = ROW\r\nsync_binlog = 1\r\ninnodb_flush_log_at_trx_commit = 1\r\n                <\/pre>\n<\/li>\n<li>\u552f\u8b80\u526f\u672c\u8a2d\u7f6e\uff1a\n<pre>\r\nserver-id = 2\r\nrelay_log = \/var\/log\/mysql\/mysql-relay-bin\r\nread_only = 1\r\nsuper_read_only = 1\r\n                <\/pre>\n<\/li>\n<li>\u8ca0\u8f09\u5e73\u8861\u5668\u914d\u7f6e\uff1a\n<pre>\r\nbackend mysql-cluster\r\n    mode tcp\r\n    balance roundrobin\r\n    server mysql-1 10.0.0.1:3306 check\r\n    server mysql-2 10.0.0.2:3306 check backup\r\n                <\/pre>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u5099\u4efd\u548c\u5fa9\u539f\uff1a\n<ul>\n<li>\u81ea\u52d5\u5099\u4efd\u6307\u4ee4\u78bc\uff1a\n<pre>\r\n#!\/bin\/bash\r\nDATE=$(date +%Y%m%d)\r\nmysqldump --single-transaction \\\r\n    --master-data=2 \\\r\n    --all-databases \\\r\n    | gzip > \/backup\/mysql-${DATE}.sql.gz\r\n                <\/pre>\n<\/li>\n<li>\u6642\u9593\u9ede\u5fa9\u539f\u8a2d\u7f6e\uff1a\n<pre>\r\nbinlog_expire_logs_seconds = 604800\r\nmax_binlog_size = 100M\r\nbinlog_row_image = MINIMAL\r\n                <\/pre>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><strong>\u6545\u969c\u6392\u67e5\u6e05\u55ae<\/strong><\/h2>\n<p>\u5be6\u65bd\u9019\u500b\u5168\u9762\u7684\u6e05\u55ae\u4ee5\u7cfb\u7d71\u5730\u89e3\u6c7a\u554f\u984c\uff1a<\/p>\n<ul>\n<li>\u2713 \u7db2\u8def\u8a3a\u65b7\uff1a\n<ul>\n<li>\u8cc7\u6599\u5c01\u5305\u907a\u5931\u8abf\u67e5<\/li>\n<li>\u8de8\u5340\u57df\u5ef6\u9072\u6e2c\u91cf<\/li>\n<li>DNS\u89e3\u6790\u9a57\u8b49<\/li>\n<li>SSL\/TLS\u6191\u8b49\u9a57\u8b49<\/li>\n<\/ul>\n<\/li>\n<li>\u2713 \u8cc7\u6e90\u76e3\u63a7\uff1a\n<ul>\n<li>CPU\u4f7f\u7528\u7387\u6a21\u5f0f<\/li>\n<li>\u8a18\u61b6\u9ad4\u4f7f\u7528\u548c\u4ea4\u63db\u6d3b\u52d5<\/li>\n<li>\u78c1\u789fI\/O\u6548\u80fd<\/li>\n<li>\u7db2\u8def\u983b\u5bec\u6d88\u8017<\/li>\n<\/ul>\n<\/li>\n<li>\u2713 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