{"id":324,"date":"2022-06-23T14:54:01","date_gmt":"2022-06-23T06:54:01","guid":{"rendered":"https:\/\/frogvps.com\/?p=324"},"modified":"2022-06-23T14:54:02","modified_gmt":"2022-06-23T06:54:02","slug":"mysql%e5%90%af%e5%8a%a8%e9%80%89%e9%a1%b9%e5%92%8c%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/frogvps.com\/?p=324","title":{"rendered":"MYSQL\u542f\u52a8\u9009\u9879\u548c\u53d8\u91cf"},"content":{"rendered":"\n<p>\u53ef\u4ee5\u901a\u8fc7mysqld\u9009\u9879\uff0c\u670d\u52a1\u5668\u7cfb\u7edf\u53d8\u91cf\u548c\u72b6\u6001\u53d8\u91cf\u8fdb\u884cMySQL\u7684\u914d\u7f6e\u548c\u67e5\u770b\u72b6\u6001\u3002mysqld\u9009\u9879\u548c\u53d8\u91cf\u672c\u8d28\u4e0a\u4e0d\u662f\u540c\u4e00\u4e2a\u4e1c\u897f\uff0c\u4f46\u662f\u5b83\u4eec\u6709\u65f6\u5019\u4f1a\u521a\u597d\u91cd\u540d\uff0c \u67d0\u4e2a\u4e1c\u897f\u5b83\u662fmysqld\u9009\u9879\u8fd8\u662f\u7cfb\u7edf\u53d8\u91cf\u53ef\u4ee5\u53c2\u8003\u4e0b\u9762\u7684\u5b98\u65b9\u7ed9\u7684\u8868\u683c\u3002<\/p>\n\n\n\n<p><strong>\u5b98\u65b9\u6587\u6863\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>https:&#47;&#47;dev.mysql.com\/doc\/refman\/8.0\/en\/server-option-variable-reference.html<\/code><\/pre>\n\n\n\n<p><strong>\u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5176\u4e2d\u6709\u4e9b\u53c2\u6570\u652f\u6301\u8fd0\u884c\u65f6\u4fee\u6539\uff0c\u4f1a\u7acb\u5373\u751f\u6548<\/li><li>\u6709\u4e9b\u53c2\u6570\u4e0d\u652f\u6301\u52a8\u6001\u4fee\u6539\uff0c\u53ea\u80fd\u901a\u8fc7\u4fee\u6539\u914d\u7f6e\u6587\u4ef6\uff0c\u5e76\u91cd\u542f\u670d\u52a1\u751f\u6548<\/li><li>\u6709\u4e9b\u53c2\u6570\u4f5c\u7528\u57df\u662f\u5168\u5c40\u7684\uff0c\u4e3a\u6240\u6709\u4f1a\u8bdd\u8bbe\u7f6e<\/li><li>\u6709\u4e9b\u53ef\u4ee5\u4e3a\u6bcf\u4e2a\u7528\u6237\u63d0\u4f9b\u5355\u72ec\uff08\u4f1a\u8bdd\uff09\u7684\u8bbe\u7f6e<\/li><\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">MYSQL\u670d\u52a1\u5668\u9009\u9879<\/h2>\n\n\n\n<p>\u670d\u52a1\u5668\u9009\u9879\u7528\u6a2a\u7ebf\uff0c\u4e0d\u7528\u4e0b\u5212\u7ebf\u3002<\/p>\n\n\n\n<p><strong>\u67e5\u770bmysqld\u53ef\u7528\u9009\u9879<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mysqld --verbose --help<\/code><\/pre>\n\n\n\n<p><strong>\u67e5\u770bmysqld\u5f53\u524d\u542f\u52a8\u9009\u9879<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mysqld --print-defaults<\/code><\/pre>\n\n\n\n<p>\u8bbe\u7f6e\u670d\u52a1\u5668\u9009\u9879\u7684\u65b9\u6cd5\u6709\u4e24\u79cd<\/p>\n\n\n\n<p>1.\u542f\u52a8\u65f6\u5728\u547d\u4ee4\u884c\u8bbe\u7f6e<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mysqld --basedir=\/usr<\/code><\/pre>\n\n\n\n<p>2.\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u8bbe\u7f6e\uff0c\u7136\u540e\u91cd\u542f\u670d\u52a1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;mysqld]\nbasedir=\/usr<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">MYSQL\u7cfb\u7edf\u53d8\u91cf<\/h2>\n\n\n\n<p>\u53ef\u4ee5\u5206\u5168\u5c40\u548c\u4f1a\u8bdd\u4e24\u79cd\uff0c\u7528\u4e0b\u5212\u7ebf\uff0c\u4e0d\u7528\u6a2a\u7ebf\u3002<\/p>\n\n\n\n<p><strong>\u67e5\u770b\u7cfb\u7edf\u53d8\u91cf\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#\u53ea\u67e5\u770b\u5168\u5c40\u7684\u53d8\u91cf\nSHOW GLOBAL VARIABLES;\n\n#\u67e5\u770b\u6240\u6709\u53d8\u91cf\uff08GLOBAL\u548cSESSION\uff09\nSHOW SESSION VARIABLES;\nSHOW VARIABLES;\n\n#\u67e5\u770b\u67d0\u4e2a\u6307\u5b9a\u7684\u7cfb\u7edf\u53d8\u91cf\nSHOW VARIABLES LIKE 'VAR_NAME';\nSELECT @@VAR_NAME;<\/code><\/pre>\n\n\n\n<p><strong>\u4fee\u6539\u5168\u5c40\u53d8\u91cf\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#\u4ec5\u5bf9\u4fee\u6539\u540e\u65b0\u521b\u5efa\u7684\u4f1a\u8bdd\u6709\u6548\uff0c\u5bf9\u5df2\u5efa\u7acb\u7684\u4f1a\u8bdd\u65e0\u6548\nSET GLOBAL system_var_name=value;\nSET @@global.system_var_name=value;<\/code><\/pre>\n\n\n\n<p><strong>\u4fee\u6539\u4f1a\u8bdd\u53d8\u91cf\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SET system_var_name=value;\nSET @@system_var_name=value;<\/code><\/pre>\n\n\n\n<p><strong>\u8303\u4f8b\uff1a\u4fee\u6539mysql\u6700\u5927\u5e76\u53d1\u8fde\u63a5\u6570<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#\u65b9\u6cd5\u4e00\uff1a\u4fee\u6539\u5168\u5c40\u53d8\u91cf\nSET GLOBAL max_connections=2000;\nSELECT @@max_connections;\n\n#\u65b9\u6cd5\u4e8c\uff1a\u5b83\u4e5f\u662f\u4e00\u4e2a\u670d\u52a1\u5668\u9009\u9879\uff0c\u53ef\u4ee5\u5199\u5165\u914d\u7f6e\u6587\u4ef6\u540e\u91cd\u542f\u670d\u52a1\n&#91;mysqld]\r\nmax_connections = 2000\r\n\r\n#\u4ee5\u4e0a\u4fee\u6539\u5b8c\u540e\uff0c\u9700\u8981\u786e\u4fddservice\u6587\u4ef6\u4e2d\u5bf9\u4e8e\u53ef\u4ee5\u540c\u65f6\u6253\u5f00\u7684\u6587\u4ef6\u6570\u91cf\u7684\u9650\u5236\u662f\u9ad8\u4e8e\u8fd9\u4e2a\u503c\u7684\r\nvim \/usr\/lib\/systemd\/system\/mysqld.service\r\n&#91;Service]\r\nLimitNOFILE=65535\r\n\r\n#\u91cd\u65b0\u52a0\u8f7dservice\u914d\u7f6e\uff0c\u7136\u540e\u91cd\u542fmysqld\uff08ubuntu\u662fmysql\uff09\r\nsystemctl daemon-reload\r\nsystemctl restart mysqld<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">MYSQL\u72b6\u6001\u53d8\u91cf<\/h2>\n\n\n\n<p>MYSQL\u8fd0\u884c\u4e2d\u7684\u7528\u6765\u7edf\u8ba1\u6570\u636e\u7684\u53d8\u91cf\uff0c\u4e0d\u53ef\u4fee\u6539\u3002<\/p>\n\n\n\n<p><strong>\u67e5\u770b\u670d\u52a1\u5668\u72b6\u6001\u53d8\u91cf\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#\u5168\u5c40\u53d8\u91cf\nSHOW GLOBAL STATUS;\n#\u6240\u6709\u53d8\u91cf\nSHOW STATUS;\n#\u67e5\u770b\u6307\u5b9a\u53d8\u91cf\nSHOW STATUS LIKE 'VAR_NAME';<\/code><\/pre>\n\n\n\n<p><strong>\u8303\u4f8b\uff1a\u7edf\u8ba1SELECT\u67e5\u8be2\u7684\u6b21\u6570<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SHOW STATUS LIKE \"com_select\";<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u53d8\u91cf SQL_MODE<\/h2>\n\n\n\n<p>sql\u65e2\u53ef\u4ee5\u4f5c\u4e3a\u5168\u5c40\u53d8\u91cf\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u4f1a\u8bdd\u53d8\u91cf\u3002<\/p>\n\n\n\n<p><strong>\u5e38\u89c1mode\uff1a<\/strong><\/p>\n\n\n\n<p>\u7981\u6b62GRANT\u521b\u5efa\u5bc6\u7801\u4e3a\u7a7a\u7684\u7528\u6237<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>NO_AUTO_CREATE_USER<\/code><\/pre>\n\n\n\n<p>\u5728\u4e25\u683c\u6a21\u5f0f\uff0c\u4e0d\u5141\u8bb8\u4f7f\u7528&#8217;0000-00-00&#8217;\u7684\u65f6\u95f4<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>NO_ZERO_DATE<\/code><\/pre>\n\n\n\n<p>\u5bf9\u4e8eGROUP BY\u805a\u5408\u64cd\u4f5c\uff0c\u5982\u679c\u5728SELECT\u4e2d\u7684\u5217\uff0c\u6ca1\u6709\u5728GROUP BY\u4e2d\u51fa\u73b0\uff0c\u90a3\u4e48\u7cfb\u7edf\u4f1a\u8ba4\u4e3a\u8fd9\u4e2aSQL\u662f\u4e0d\u5408\u6cd5\u7684<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ONLY_FULL_GROUP_BY<\/code><\/pre>\n\n\n\n<p>\u5c06\u53cd\u659c\u6760\u4f5c\u4e3a\u666e\u901a\u5b57\u7b26\u800c\u975e\u8f6c\u4e49\u5b57\u7b26<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>NO_BACKSLASH_ESCAPES<\/code><\/pre>\n\n\n\n<p>\u5c06&#8221;||&#8221;\u89c6\u4e3a\u8fde\u63a5\u64cd\u4f5c\u7b26\u800c\u975e&#8221;\u6216&#8221;\u8fd0\u7b97\u7b26<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>IPES_AS_CONCAT<\/code><\/pre>\n\n\n\n<p><strong>\u8303\u4f8b\uff1a\u4fee\u6539sql_mode\u53d8\u91cf<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SET sql_mode=\"STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION\";<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u53ef\u4ee5\u901a\u8fc7mysqld\u9009\u9879\uff0c\u670d\u52a1\u5668\u7cfb\u7edf\u53d8\u91cf\u548c\u72b6\u6001\u53d8\u91cf\u8fdb\u884cMySQL\u7684\u914d\u7f6e\u548c\u67e5\u770b\u72b6\u6001\u3002mysqld\u9009\u9879\u548c\u53d8\u91cf\u672c\u8d28\u4e0a\u4e0d\u662f\u540c\u4e00\u4e2a\u4e1c\u897f\uff0c\u4f46\u662f\u5b83\u4eec\u6709\u65f6\u5019\u4f1a\u521a\u597d\u91cd\u540d\uff0c \u67d0\u4e2a\u4e1c\u897f\u5b83\u662fmysqld\u9009\u9879\u8fd8\u662f\u7cfb\u7edf\u53d8\u91cf\u53ef\u4ee5\u53c2\u8003\u4e0b\u9762\u7684\u5b98\u65b9\u7ed9\u7684\u8868\u683c\u3002 \u5b98\u65b9\u6587\u6863\uff1a \u6ce8\u610f&#8230;<\/p>\n","protected":false},"author":1,"featured_media":283,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[36],"topic":[],"class_list":["post-324","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-35","tag-mysql"],"_links":{"self":[{"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/posts\/324","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=324"}],"version-history":[{"count":8,"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/posts\/324\/revisions"}],"predecessor-version":[{"id":332,"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/posts\/324\/revisions\/332"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=\/wp\/v2\/media\/283"}],"wp:attachment":[{"href":"https:\/\/frogvps.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=324"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/frogvps.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftopic&post=324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}