{"id":112,"date":"2025-02-05T19:28:52","date_gmt":"2025-02-05T11:28:52","guid":{"rendered":"https:\/\/www.handytoo.com\/?p=112"},"modified":"2025-02-05T19:28:52","modified_gmt":"2025-02-05T11:28:52","slug":"%e5%a6%82%e4%bd%95%e5%bc%80%e5%90%afmysql%e6%85%a2%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"https:\/\/www.handytoo.com\/?p=112","title":{"rendered":"\u5982\u4f55\u5f00\u542fMysql\u6162\u67e5\u8be2"},"content":{"rendered":"\n

\u7b80\u4ecb<\/h2>\n\n\n\n

\u5f00\u542f\u6162\u67e5\u8be2\u65e5\u5fd7\uff0c\u53ef\u4ee5\u8ba9MySQL\u8bb0\u5f55\u4e0b\u67e5\u8be2\u8d85\u8fc7\u6307\u5b9a\u65f6\u95f4\u7684\u8bed\u53e5\uff0c\u901a\u8fc7\u5b9a\u4f4d\u5206\u6790\u6027\u80fd\u7684\u74f6\u9888\uff0c\u624d\u80fd\u66f4\u597d\u7684\u4f18\u5316\u6570\u636e\u5e93\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n

\u53c2\u6570\u8bf4\u660e<\/h2>\n\n\n\n

slow_query_log \u6162\u67e5\u8be2\u5f00\u542f\u72b6\u6001<\/p>\n\n\n\n

slow_query_log_file \u6162\u67e5\u8be2\u65e5\u5fd7\u5b58\u653e\u7684\u4f4d\u7f6e\uff08\u8fd9\u4e2a\u76ee\u5f55\u9700\u8981MySQL\u7684\u8fd0\u884c\u5e10\u53f7\u7684\u53ef\u5199\u6743\u9650\uff0c\u4e00\u822c\u8bbe\u7f6e\u4e3aMySQL\u7684\u6570\u636e\u5b58\u653e\u76ee\u5f55\uff09<\/p>\n\n\n\n

long_query_time \u67e5\u8be2\u8d85\u8fc7\u591a\u5c11\u79d2\u624d\u8bb0\u5f55<\/p>\n\n\n\n

\u8bbe\u7f6e\u6b65\u9aa4<\/h2>\n\n\n\n

\u67e5\u770b\u6162\u67e5\u8be2\u76f8\u5173\u53c2\u6570<\/h3>\n\n\n\n
mysql> show variables like 'slow_query%';\n+-----------------------+----------------------------------+\n| Variable_name         | Value                            |\n+-----------------------+----------------------------------+\n| slow_query_log        | OFF                              |\n| slow_query_log_file   | \/mysql\/data\/localhost-slow.log   |\n+-----------------------+----------------------------------+\n<\/pre>\n\n\n\n
mysql> show variables like 'long_query_time';\n+-----------------+-----------+\n| Variable_name   | Value     |\n+-----------------+-----------+\n| long_query_time | 10.000000 |\n+-----------------+-----------+\n<\/pre>\n\n\n\n
\u8bbe\u7f6e\u65b9\u6cd5<\/h2>\n\n\n\n
\u65b9\u5f0f1\uff1a\u5168\u5c40\u53d8\u91cf\u8bbe\u7f6e<\/h3>\n\n\n\n
\u5c06 slow_query_log \u5168\u5c40\u53d8\u91cf\u8bbe\u7f6e\u4e3a\u201cON\u201d\u72b6\u6001<\/p>\n\n\n\n
mysql> set global slow_query_log='ON'; \n<\/pre>\n\n\n\n
\u8bbe\u7f6e\u6162\u67e5\u8be2\u65e5\u5fd7\u5b58\u653e\u7684\u4f4d\u7f6e<\/p>\n\n\n\n
mysql> set global slow_query_log_file='\/usr\/local\/mysql\/data\/slow.log';\n<\/pre>\n\n\n\n
\u67e5\u8be2\u8d85\u8fc71\u79d2\u5c31\u8bb0\u5f55<\/p>\n\n\n\n
mysql> set global long_query_time=1;\n<\/pre>\n\n\n\n
\u65b9\u5f0f2\uff1a\u914d\u7f6e\u6587\u4ef6\u8bbe\u7f6e<\/h3>\n\n\n\n
\u4fee\u6539\u914d\u7f6e\u6587\u4ef6my.cnf\uff0c\u5728[mysqld]\u4e0b\u7684\u4e0b\u65b9\u52a0\u5165<\/p>\n\n\n\n
[mysqld]\nslow_query_log = ON\nslow_query_log_file = \/usr\/local\/mysql\/data\/slow.log\nlong_query_time = 1\n<\/pre>\n\n\n\n
\u91cd\u542fMySQL\u670d\u52a1<\/h3>\n\n\n\n
service mysqld restart\n<\/pre>\n\n\n\n
\u67e5\u770b\u8bbe\u7f6e\u540e\u7684\u53c2\u6570<\/h3>\n\n\n\n
mysql> show variables like 'slow_query%';\n+---------------------+--------------------------------+\n| Variable_name       | Value                          |\n+---------------------+--------------------------------+\n| slow_query_log      | ON                             |\n| slow_query_log_file | \/usr\/local\/mysql\/data\/slow.log |\n+---------------------+--------------------------------+\n<\/pre>\n\n\n\n
mysql> show variables like 'long_query_time';\n+-----------------+----------+\n| Variable_name   | Value    |\n+-----------------+----------+\n| long_query_time | 1.000000 |\n+-----------------+----------+\n<\/pre>\n\n\n\n
\u6d4b\u8bd5<\/h2>\n\n\n\n
\u6267\u884c\u4e00\u6761\u6162\u67e5\u8be2SQL\u8bed\u53e5<\/p>\n\n\n\n
mysql> select sleep(2);\n<\/pre>\n\n\n\n
\u67e5\u770b\u662f\u5426\u751f\u6210\u6162\u67e5\u8be2\u65e5\u5fd7<\/p>\n\n\n\n
cat  \/usr\/local\/mysql\/data\/slow.log<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u7b80\u4ecb \u5f00\u542f\u6162\u67e5\u8be2\u65e5\u5fd7\uff0c\u53ef\u4ee5\u8ba9MySQL\u8bb0\u5f55\u4e0b\u67e5\u8be2\u8d85\u8fc7\u6307\u5b9a\u65f6\u95f4\u7684\u8bed\u53e5\uff0c\u901a\u8fc7\u5b9a\u4f4d\u5206\u6790\u6027\u80fd\u7684\u74f6\u9888\uff0c\u624d\u80fd\u66f4\u597d\u7684\u4f18\u5316\u6570\u636e […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[29],"class_list":["post-112","post","type-post","status-publish","format-standard","hentry","category-database","tag-mysql"],"_links":{"self":[{"href":"https:\/\/www.handytoo.com\/index.php?rest_route=\/wp\/v2\/posts\/112","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.handytoo.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.handytoo.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.handytoo.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.handytoo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=112"}],"version-history":[{"count":1,"href":"https:\/\/www.handytoo.com\/index.php?rest_route=\/wp\/v2\/posts\/112\/revisions"}],"predecessor-version":[{"id":113,"href":"https:\/\/www.handytoo.com\/index.php?rest_route=\/wp\/v2\/posts\/112\/revisions\/113"}],"wp:attachment":[{"href":"https:\/\/www.handytoo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.handytoo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=112"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.handytoo.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}