{"id":826,"date":"2022-10-10T06:35:00","date_gmt":"2022-10-09T22:35:00","guid":{"rendered":"http:\/\/www.langmanezhuang.com\/index.php\/2022\/10\/10\/mysql%e6%85%a2%e6%97%a5%e5%bf%97%e5%bc%80%e5%90%af%e4%bb%a5%e5%8f%8a%e8%ae%be%e7%bd%ae\/"},"modified":"2022-10-10T06:35:00","modified_gmt":"2022-10-09T22:35:00","slug":"mysql%e6%85%a2%e6%97%a5%e5%bf%97%e5%bc%80%e5%90%af%e4%bb%a5%e5%8f%8a%e8%ae%be%e7%bd%ae","status":"publish","type":"post","link":"http:\/\/blog.langmanezhuang.com\/index.php\/2022\/10\/10\/mysql%e6%85%a2%e6%97%a5%e5%bf%97%e5%bc%80%e5%90%af%e4%bb%a5%e5%8f%8a%e8%ae%be%e7%bd%ae\/","title":{"rendered":"mysql\u6162\u65e5\u5fd7\u5f00\u542f\u4ee5\u53ca\u8bbe\u7f6e"},"content":{"rendered":"

\u4e00\u3001\u7b80\u4ecb<\/p>\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

\u4e8c\u3001\u53c2\u6570\u8bf4\u660e<\/p>\n

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

slow_query_log_file \u6162\u67e5\u8be2\u65e5\u5fd7\u5b58\u653e\u7684\u4f4d\u7f6e(\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)<\/p>\n

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

\u4e09\u3001\u8bbe\u7f6e\u6b65\u9aa4<\/p>\n

1.\u67e5\u770b\u6162\u67e5\u8be2\u76f8\u5173\u53c2\u6570<\/p>\n

\u590d\u5236\u4ee3\u7801<\/p>\n

mysql> show variables like ‘slow_query%’;<\/p>\n

+—————————+———————————-+<\/p>\n

| Variable_name | Value |<\/p>\n

+—————————+———————————-+<\/p>\n

| slow_query_log | OFF |<\/p>\n

| slow_query_log_file | \/mysql\/data\/localhost-slow.log |<\/p>\n

+—————————+———————————-+<\/p>\n

mysql> show variables like ‘long_query_time’;<\/p>\n

+—————–+———–+<\/p>\n

| Variable_name | Value |<\/p>\n

+—————–+———–+<\/p>\n

| long_query_time | 10.000000 |<\/p>\n

+—————–+———–+<\/p>\n

\u590d\u5236\u4ee3\u7801<\/p>\n

2.\u8bbe\u7f6e\u65b9\u6cd5<\/p>\n

\u65b9\u6cd5\u4e00\uff1a\u5168\u5c40\u53d8\u91cf\u8bbe\u7f6e<\/p>\n

\u5c06 slow_query_log \u5168\u5c40\u53d8\u91cf\u8bbe\u7f6e\u4e3a“ON”\u72b6\u6001<\/p>\n

mysql> set global slow_query_log=’ON’;<\/p>\n

\u8bbe\u7f6e\u6162\u67e5\u8be2\u65e5\u5fd7\u5b58\u653e\u7684\u4f4d\u7f6e<\/p>\n

mysql> set global slow_query_log_file=’\/usr\/local\/mysql\/data\/slow.log’;<\/p>\n

\u67e5\u8be2\u8d85\u8fc71\u79d2\u5c31\u8bb0\u5f55<\/p>\n

mysql> set global long_query_time=1;<\/p>\n

\u6216 \u8bbe\u7f6e\u975e\u5168\u5c40\u8d85\u65f6\u65f6\u95f4\u4e3a2\u79d2  <\/p>\n

mysql> set long_query_time = 2;<\/p>\n

\u65b9\u6cd5\u4e8c\uff1a\u914d\u7f6e\u6587\u4ef6\u8bbe\u7f6e<\/p>\n

\u4fee\u6539\u914d\u7f6e\u6587\u4ef6my.cnf\uff0c\u5728[mysqld]\u4e0b\u7684\u4e0b\u65b9\u52a0\u5165<\/p>\n

[mysqld]<\/p>\n

slow_query_log = ON<\/p>\n

slow_query_log_file = \/usr\/local\/mysql\/data\/slow.log<\/p>\n

long_query_time = 1<\/p>\n

3.\u91cd\u542fMySQL\u670d\u52a1<\/p>\n

service mysqld restart<\/p>\n

4.\u67e5\u770b\u8bbe\u7f6e\u540e\u7684\u53c2\u6570<\/p>\n

\u590d\u5236\u4ee3\u7801<\/p>\n

mysql> show variables like ‘slow_query%’;<\/p>\n

+———————+——————————–+<\/p>\n

| Variable_name | Value |<\/p>\n

+———————+——————————–+<\/p>\n

| slow_query_log | ON |<\/p>\n

| slow_query_log_file | \/usr\/local\/mysql\/data\/slow.log |<\/p>\n

+———————+——————————–+<\/p>\n

mysql> show variables like ‘long_query_time’;<\/p>\n

+—————–+———-+<\/p>\n

| Variable_name | Value |<\/p>\n

+—————–+———-+<\/p>\n

| long_query_time | 1.000000 |<\/p>\n

+—————–+———-+<\/p>\n

\u590d\u5236\u4ee3\u7801<\/p>\n

\u56db\u3001\u6d4b\u8bd5<\/p>\n

1.\u6267\u884c\u4e00\u6761\u6162\u67e5\u8be2SQL\u8bed\u53e5<\/p>\n

mysql> select sleep(2);<\/p>\n

2.\u67e5\u770b\u662f\u5426\u751f\u6210\u6162\u67e5\u8be2\u65e5\u5fd7<\/p>\n

ls \/usr\/local\/mysql\/data\/slow.log<\/p>\n

\u5982\u679c\u65e5\u5fd7\u5b58\u5728\uff0cMySQL\u5f00\u542f\u6162\u67e5\u8be2\u8bbe\u7f6e\u6210\u529f\uff01<\/p>\n

 <\/p>\n

 <\/p>\n

\u6709\u4efb\u4f55\u9700\u8981\u6c9f\u901a\u4ea4\u6d41\u7684\u8054\u7cfb<\/p>\n

\u79cb\u79cb\u7fa4:276483863 <\/p>\n

\"\"<\/p>\n

 <\/p>\n

  \u52a0\u597d\u53cb\u5907\u6ce8\u3010\u6280\u672f\u4ea4\u6d41\u3011<\/p>\n

 <\/div>\n

\u514d\u8d39\u5728\u7ebf\u6d41\u7a0b\u56fe\u3001\u601d\u7ef4\u5bfc\u56fe\u3001\u4e13\u4e1a\u5f3a\u5927\u7684\u4f5c\u56fe\u5de5\u5177<\/a>\uff0c\u652f\u6301\u591a\u4eba\u5b9e\u65f6\u5728\u7ebf\u534f\u4f5c\uff0c\u53ef\u7528\u4e8e\u539f\u578b\u56fe\u3001UML\u3001BPMN\u3001\u7f51\u7edc\u62d3\u6251\u56fe\u7b49\u591a\u79cd\u56fe\u5f62\u7ed8\u5236 \u611f\u89c9\u771f\u4e0d\u9519\u63a8\u8350\u7ed9\u5927\u5bb6\uff01<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e00\u3001\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 … \u7ee7\u7eed\u9605\u8bfb mysql\u6162\u65e5\u5fd7\u5f00\u542f\u4ee5\u53ca\u8bbe\u7f6e<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"http:\/\/blog.langmanezhuang.com\/index.php\/wp-json\/wp\/v2\/posts\/826"}],"collection":[{"href":"http:\/\/blog.langmanezhuang.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.langmanezhuang.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.langmanezhuang.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.langmanezhuang.com\/index.php\/wp-json\/wp\/v2\/comments?post=826"}],"version-history":[{"count":0,"href":"http:\/\/blog.langmanezhuang.com\/index.php\/wp-json\/wp\/v2\/posts\/826\/revisions"}],"wp:attachment":[{"href":"http:\/\/blog.langmanezhuang.com\/index.php\/wp-json\/wp\/v2\/media?parent=826"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.langmanezhuang.com\/index.php\/wp-json\/wp\/v2\/categories?post=826"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.langmanezhuang.com\/index.php\/wp-json\/wp\/v2\/tags?post=826"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}