{"id":321,"date":"2023-12-13T16:26:53","date_gmt":"2023-12-13T08:26:53","guid":{"rendered":"https:\/\/www.liaoxinghui.com\/?p=321"},"modified":"2023-12-13T16:26:55","modified_gmt":"2023-12-13T08:26:55","slug":"%e8%a7%a3%e5%86%b3mysql%e5%8d%a1%e9%a1%bf%e7%9a%84%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.liaoxinghui.com\/?p=321","title":{"rendered":"\u89e3\u51b3\u4e00\u4e2amysql\u7684\u95ee\u9898"},"content":{"rendered":"<p class=\"wp-block-paragraph\"> \u4eca\u5929\u540c\u4e8b\u53cd\u5e94\u7cfb\u7edf\u54cd\u5e94\u7f13\u6162\uff0c\u770b\u4e86\u4e00\u4e0b\u9875\u9762\u52a0\u8f7d\u65f6\u95f4\u786e\u5b9e\u6bd4\u8f83\u957f\uff0c\u5728\u6392\u67e5\u4e863\u5c42\u7684\u7f51\u7edc\u540e\uff0c\u786e\u5b9a\u7f51\u7edc\u6ca1\u6709\u95ee\u9898\uff0c\u90a3\u4e48\u5927\u6982\u7387\u662f\u6570\u636e\u5e93\u7684\u95ee\u9898\uff0c\u56e0\u4e3a\u5e94\u7528\u5e76\u6ca1\u6709\u8fdb\u884c\u66f4\u65b0\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u8fdb\u5165mysql\u6240\u5728\u7684\u670d\u52a1\u5668\u53d1\u73b0CPU\u5168\u90e8\u6253\u6ee1\uff0c\u505c\u6389\u670d\u52a1\u540e\u6b63\u5e38\uff0c\u4e8e\u662f\u5f00\u59cb\u505c\u673a\u7ef4\u62a4\u3002<\/p>\n<p class=\"wp-block-paragraph\">\u8bca\u65ad\u8fc7\u7a0b\uff1a<\/p>\n<p class=\"wp-block-paragraph\">1.\u68c0\u67e5\u6570\u636e\u8868\u6570\u91cf\uff0c\u53d1\u73b0\u5e76\u4e0d\u591a\uff0c\u4e3b\u8868\u624d\u51e0\u5341\u4e07\u6761\u8bb0\u5f55\u3002<\/p>\n<p class=\"wp-block-paragraph\">2.\u4f7f\u7528<code>SHOW FULL PROCESSLIST<\/code>\u547d\u4ee4\u67e5\u770b\u4e86\u4e00\u4e0b\uff0c\u662f\u6b63\u5e38\u7684\u67e5\u8be2\u8bed\u53e5\u3002<\/p>\n<p class=\"wp-block-paragraph\">3.\u770b\u4e86\u4e0b\u67e5\u8be2\u8bed\u53e5\uff0c<code>IN<\/code>\u5b50\u53e5\u4e2d\u7684\u5b50\u67e5\u8be2\uff0c\u5982\u679c\u5b50\u67e5\u8be2\u8fd4\u56de\u7684\u7ed3\u679c\u96c6\u5f88\u5927\uff0c\u5b83\u53ef\u80fd\u4f1a\u5f71\u54cd\u6027\u80fd\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u8fde\u63a5\uff08JOIN\uff09\u6765\u4ee3\u66ff\u5b50\u67e5\u8be2\uff0c\u4f46\u662f\u7ed3\u679c\u96c6\u5e76\u4e0d\u591a\uff0c\u4e5f\u4e0d\u662f\u5173\u952e\u3002<\/p>\n<p class=\"wp-block-paragraph\">4.\u4f7f\u7528EXPLAIN\u67e5\u4e86\u4e0b\u8bed\u53e5\uff0c\u8be5\u8bed\u53e5\u662f2\u5f20\u8868\u7684\u8054\u67e5\uff0cA\u8868\u6ca1\u6709\u7528\u5230\u7d22\u5f15\uff0cB\u8868\u6709\u4e00\u4e2a\u552f\u4e00\u7d22\u5f15\uff0c\u611f\u89c9\u4e5f\u4e0d\u662f\u95ee\u9898\u6240\u5728\u3002<\/p>\n<p class=\"wp-block-paragraph\">5.\u6700\u540e\u95ee\u9898\u5728\u914d\u7f6e\u6587\u4ef6\u4e0a\uff0c\u540c\u4e8b\u4f7f\u7528\u519b\u54e5\u7684LNMP\u5b89\u88c5\u7684\u5957\u4ef6\uff0c\u6ca1\u6709\u4fee\u6539my.cnf\uff0c\u9ed8\u8ba4\u7684\u914d\u7f6e\u662f\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#password   = your_password\nport        = 3306\nsocket      = \/tmp\/mysql.sock\n\n[mysqld]\nport        = 3306\nsocket      = \/tmp\/mysql.sock\ndatadir = \/usr\/local\/mysql\/var\nskip-external-locking\nkey_buffer_size = 16M\nmax_allowed_packet = 1M\ntable_open_cache = 64\nsort_buffer_size = 512K\nnet_buffer_length = 8K\nread_buffer_size = 256K\nread_rnd_buffer_size = 512K\nmyisam_sort_buffer_size = 8M\nthread_cache_size = 8\nquery_cache_size = 8M\ntmp_table_size = 16M\nperformance_schema_max_table_instances = 500\n\nexplicit_defaults_for_timestamp = true\n#skip-networking\nmax_connections = 500\nmax_connect_errors = 100\nopen_files_limit = 65535\n\nlog-bin=mysql-bin\nbinlog_format=ROW\nserver-id   = 3\nbinlog-do-db = case_manage\nexpire_logs_days = 10\nearly-plugin-load = \"\"\n\ndefault_storage_engine = InnoDB\ninnodb_file_per_table = 1\ninnodb_data_home_dir = \/usr\/local\/mysql\/var\ninnodb_data_file_path = ibdata1:10M:autoextend\ninnodb_log_group_home_dir = \/usr\/local\/mysql\/var\ninnodb_buffer_pool_size = 16M\ninnodb_log_file_size = 5M\ninnodb_log_buffer_size = 8M\ninnodb_flush_log_at_trx_commit = 1\ninnodb_lock_wait_timeout = 50\n\n[mysqldump]\nquick\nmax_allowed_packet = 16M\n\n[mysql]\nno-auto-rehash\n\n[myisamchk]\nkey_buffer_size = 20M\nsort_buffer_size = 20M\nread_buffer_size = 2M\nwrite_buffer_size = 2M\n\n[mysqlhotcopy]\ninteractive-timeout<\/pre>\n<p class=\"wp-block-paragraph\">\u53d1\u73b0\u53c2\u6570\u90fd\u662f\u9ed8\u8ba4\u7684\uff0c\u592a\u5c0f\u4e86\uff0c\u6539\u4e86\u4e00\u4e0b\u53c2\u6570\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">innodb_buffer_pool_size = 20G\ninnodb_log_file_size = 1G\ninnodb_buffer_pool_instances = 10\nmax_heap_table_size = 256M\ntable_open_cache = 2000\nthread_cache_size = 50\ntmp_table_size = 256M\ninnodb_log_buffer_size = 128M<\/pre>\n<p class=\"wp-block-paragraph\">\u90e8\u5206\u4fee\u6539\uff0c\u90e8\u5206\u65b0\u589e\uff0c\u4fee\u6539\u5b8c\u91cd\u542f\u670d\u52a1\uff0c\u4f7f\u7528\u547d\u4ee4\u68c0\u67e5\u662f\u5426\u751f\u6548\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">HOW VARIABLES LIKE 'innodb_buffer_pool_size';<\/pre>\n<p class=\"wp-block-paragraph\">\u7f13\u51b2\u6c60\u7684\u914d\u7f6e\u5df2\u7ecf\u4fee\u6539\u4e86\uff0c\u6ca1\u95ee\u9898\u3002<\/p>\n<p class=\"wp-block-paragraph\"> \u670d\u52a1\u8dd1\u8d77\u6765\u540e\u53cd\u9988\u826f\u597d\uff0c\u95ee\u9898\u89e3\u51b3\uff0c\u4e0b\u9762\u9644\u4e00\u4e0b\u8fd9\u4e9b\u53c2\u6570\u7684\u610f\u601d\u3002<\/p>\n<ol class=\"wp-block-list\">\n<li><strong>innodb_buffer_pool_size<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u662f\u6700\u5173\u952e\u7684\u8bbe\u7f6e\u4e4b\u4e00\u3002\u5bf9\u4e8e32GB\u5185\u5b58\uff0c\u5efa\u8bae\u8bbe\u7f6e\u4e3a\u5185\u5b58\u768450%\u523070%\uff0c\u537316GB\u523022GB\u3002\u4f8b\u5982\uff1a<code>innodb_buffer_pool_size = 20G<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n<li><strong>innodb_log_file_size<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u53d6\u51b3\u4e8e\u4e8b\u52a1\u5927\u5c0f\uff0c\u4f46\u901a\u5e38\u8bbe\u7f6e\u4e3a1GB\u5de6\u53f3\u662f\u4e2a\u5408\u9002\u7684\u8d77\u59cb\u503c\u3002\u4f8b\u5982\uff1a<code>innodb_log_file_size = 1G<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n<li><strong>innodb_buffer_pool_instances<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u4f60\u7684 <code>innodb_buffer_pool_size<\/code> \u5927\u4e8e1GB\uff0c\u90a3\u6211\u4eec\u53ef\u4ee5\u8003\u8651\u8bbe\u7f6e\u591a\u4e2a\u7f13\u51b2\u6c60\u5b9e\u4f8b\u3002\u6bcf\u4e2a\u5b9e\u4f8b\u5927\u7ea61GB\u52302GB\u3002\u4f8b\u5982\uff1a<code>innodb_buffer_pool_instances = 10<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n<li><strong>key_buffer_size<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u4e3b\u8981\u4f7f\u7528InnoDB\uff0c\u5e76\u4e14\u5f88\u5c11\u4f7f\u7528MyISAM\u8868\uff0c\u90a3\u4e48\u4f60\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u503c\u8bbe\u7f6e\u5f97\u8f83\u5c0f\uff0c\u6bd4\u5982\uff1a<code>key_buffer_size = 32M<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n<li><strong>table_open_cache<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u53d6\u51b3\u4e8e\u4f60\u6253\u5f00\u8868\u7684\u6570\u91cf\u3002\u53ef\u4ee5\u5c1d\u8bd5\u66f4\u9ad8\u7684\u503c\uff0c\u59822000\u6216\u66f4\u591a\uff1a<code>table_open_cache = 2000<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n<li><strong>thread_cache_size<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u4e2a\u503c\u53d6\u51b3\u4e8e\u4f60\u7684\u8fde\u63a5\u6570\u3002\u5bf9\u4e8e\u9ad8\u8d1f\u8f7d\u7684\u670d\u52a1\u5668\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u4e3a50\u6216\u66f4\u9ad8\uff1a<code>thread_cache_size = 50<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n<li><strong>tmp_table_size<\/strong> \u548c <strong>max_heap_table_size<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u4e24\u4e2a\u53c2\u6570\u63a7\u5236\u4e34\u65f6\u8868\u7684\u5927\u5c0f\u3002\u8bbe\u7f6e\u4e3a\u8f83\u5927\u7684\u503c\uff0c\u4f8b\u5982256M\uff0c\u4ee5\u51cf\u5c11\u5c06\u4e34\u65f6\u8868\u5199\u5165\u78c1\u76d8\uff1a<code>tmp_table_size = 256M<\/code> \u548c <code>max_heap_table_size = 256M<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n<li><strong>query_cache_size<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>MySQL 5.7\u53ca\u4ee5\u4e0a\u7248\u672c\u5df2\u5f03\u7528\u67e5\u8be2\u7f13\u5b58\u3002\u4f46\u662f\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662f\u8f83\u65e7\u7248\u672c\uff0c\u8bf7\u6839\u636e\u4f60\u7684\u67e5\u8be2\u6a21\u5f0f\u8c03\u6574\u8fd9\u4e2a\u503c\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fc7\u5927\u7684\u67e5\u8be2\u7f13\u5b58\u53ef\u80fd\u4f1a\u964d\u4f4e\u6027\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n\n<li><strong>max_connections<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6839\u636e\u4f60\u7684\u5e94\u7528\u9700\u6c42\u8bbe\u7f6e\u3002\u4f60\u7684\u670d\u52a1\u5668\u53ef\u80fd\u53ef\u4ee5\u5904\u7406\u66f4\u591a\u8fde\u63a5\uff0c\u4f46\u9700\u8981\u76d1\u63a7\u6027\u80fd\u548c\u8d44\u6e90\u4f7f\u7528\u60c5\u51b5\u6765\u51b3\u5b9a\u5408\u9002\u7684\u503c\u3002<\/li>\n<\/ul>\n<\/li>\n\n<li><strong>innodb_log_buffer_size<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5bf9\u4e8e\u9ad8\u8d1f\u8f7d\u7684\u5199\u64cd\u4f5c\uff0c\u53ef\u4ee5\u589e\u52a0\u81f3128M\u6216\u66f4\u9ad8\uff1a<code>innodb_log_buffer_size = 128M<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n<li><strong>innodb_flush_log_at_trx_commit<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u8fd9\u4e2a\u53c2\u6570\u5f71\u54cd\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002\u503c\u4e3a1\u8868\u793a\u6bcf\u6b21\u4e8b\u52a1\u63d0\u4ea4\u90fd\u4f1a\u5199\u5165\u65e5\u5fd7\uff0c\u503c\u4e3a2\u62160\u4f1a\u589e\u52a0\u6027\u80fd\u4f46\u964d\u4f4e\u53ef\u9760\u6027\u3002\u6839\u636e\u4f60\u7684\u9700\u6c42\u8c03\u6574\uff0c\u666e\u901a\u9879\u76ee\u5efa\u8bae\u4e0d\u52a8\u3002<\/li>\n<\/ul>\n<\/li>\n\n<li><strong>open_files_limit<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6211\u4eec\u4fdd\u6301\u73b0\u6709\u8bbe\u7f6e\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\u8981\u786e\u4fdd\u8fd9\u4e2a\u503c\u9ad8\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u5141\u8bb8\u6253\u5f00\u7684\u6587\u4ef6\u6570\u9650\u5236\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"<p>\u4eca\u5929\u540c\u4e8b\u53cd\u5e94\u7cfb\u7edf\u54cd\u5e94\u7f13\u6162\uff0c\u770b\u4e86\u4e00\u4e0b\u9875\u9762\u52a0\u8f7d\u65f6\u95f4\u786e\u5b9e\u6bd4\u8f83\u957f\uff0c\u5728\u6392\u67e5\u4e863\u5c42\u7684\u7f51\u7edc\u540e\uff0c\u786e\u5b9a\u7f51\u7edc\u6ca1\u6709\u95ee\u9898\uff0c\u90a3\u4e48\u5927\u6982\u7387\u662f\u6570\u636e\u5e93\u7684\u95ee\u9898\uff0c\u56e0\u4e3a\u5e94\u7528\u5e76\u6ca1\u6709 &hellip;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-321","post","type-post","status-publish","format-standard","hentry","category-10"],"views":674,"_links":{"self":[{"href":"https:\/\/www.liaoxinghui.com\/index.php?rest_route=\/wp\/v2\/posts\/321","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.liaoxinghui.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.liaoxinghui.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.liaoxinghui.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.liaoxinghui.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=321"}],"version-history":[{"count":2,"href":"https:\/\/www.liaoxinghui.com\/index.php?rest_route=\/wp\/v2\/posts\/321\/revisions"}],"predecessor-version":[{"id":323,"href":"https:\/\/www.liaoxinghui.com\/index.php?rest_route=\/wp\/v2\/posts\/321\/revisions\/323"}],"wp:attachment":[{"href":"https:\/\/www.liaoxinghui.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.liaoxinghui.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=321"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.liaoxinghui.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}