{"id":83,"date":"2018-04-16T20:33:47","date_gmt":"2018-04-16T12:33:47","guid":{"rendered":"http:\/\/yanzhenhua.top\/?p=83"},"modified":"2018-04-16T20:33:47","modified_gmt":"2018-04-16T12:33:47","slug":"%e6%85%a2%e6%97%a5%e5%bf%97%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"http:\/\/yanzhenhua.top\/?p=83","title":{"rendered":"\u6162\u65e5\u5fd7\u67e5\u8be2"},"content":{"rendered":"

\u6162[\u65e5\u5fd7]\u67e5\u8be2\uff1a\u628asql\u8bed\u53e5\u6267\u884c\u6162\u7684\uff0c\u90fd\u8bb0\u5f55\u5230\u65e5\u5fd7\u6587\u4ef6\u91cc\u9762\u3002
\n\u5b9a\u65f6\u68c0\u67e5\u65e5\u5fd7\u6587\u4ef6\u5185\u5bb9\uff0c\u628asql\u8bed\u53e5\u6267\u884c\u6162\u8fdb\u884c\u4f18\u5316\uff01<\/p>\n

\u6162[\u65e5\u5fd7]\u67e5\u8be2\uff1a\u4f55\u4e3a\u6162\uff1f
\n \u4eba\u4e3a\u8bbe\u5b9a\u7684\u65f6\u95f4\uff0c\u8d85\u8fc7\u4e86\u5c31\u4e3a\u6162\uff01<\/p>\n

1\uff09\u6162[\u65e5\u5fd7]\u67e5\u8be2\u914d\u7f6e\uff1a<\/p>\n

show variables like 'slow_query%';\n<\/code><\/pre>\n
\"\"
\nslow_query_log\uff1a\u5f00\u5173\uff1bOFF\u7684\u65f6\u5019\u662f\u5173\u95ed\u7684\uff1bON\u7684\u65f6\u5019\u662f\u5f00\u542f\u7684\u3002
\nslow_query_log_file\uff1a\u6162\u65e5\u5fd7\u7684\u5b58\u50a8\u4f4d\u7f6e\uff0c\u8bf7\u4e0d\u8981\u4fee\u6539\u5b83\uff0c\u56e0\u4e3a\u4fee\u6539\u5c31\u6709\u6743\u9650\u7684\u95ee\u9898\uff01<\/p>\n
2\uff09\u6162[\u65e5\u5fd7]\u67e5\u8be2\u65f6\u95f4\u914d\u7f6e\uff1a<\/p>\n
show variables like 'long_query%';\n<\/code><\/pre>\n
\"\"<\/p>\n
3\uff09\u5f00\u542f\u6162[\u65e5\u5fd7]\u67e5\u8be2\uff1a<\/p>\n
set global slow_query_log = 1;\n<\/code><\/pre>\n
\"\"
\n\"\"
\n\u8fd9\u4e9b\u5185\u5bb9\uff0c\u662fmysql\u670d\u52a1\u5668\u7ba1\u7406\u4eba\u5458\u8bbe\u5b9a\u7684\u3002\u4e00\u822c\u60c5\u51b5\u90fd\u662f\u9ed8\u8ba4\u8bbe\u5b9a\u5728\u914d\u7f6e\u6587\u4ef6\u91cc\u9762\u7684\u3002\u6211\u4eec\u73b0\u5728\u4f7f\u7528\u7684\u4e34\u65f6\u6709\u6548\u7684\uff0c\u91cd\u542f\u5c31\u6ca1\u6709\u6548\u679c\uff01<\/p>\n
4\uff09\u8bbe\u5b9a\u6162[\u65e5\u5fd7]\u67e5\u8be2\u65f6\u95f4\uff1a<\/p>\n
set long_query_time = 1.111111;\n<\/code><\/pre>\n
\"\"
\n\"\"
\n5\uff09\u67e5\u770b\u6162[\u65e5\u5fd7]\u67e5\u8be2\u65e5\u5fd7\u6587\u4ef6\u4f4d\u7f6e\uff1a
\n\"\"
\n\"\"
\n\u67e5\u770b\u6162\u65e5\u5fd7\u7684\u5185\u5bb9\uff1a
\n\"\"
\n\u6216\u8005\u4f7f\u7528tail
\n\u53c2\u6570 \uff1a -f  \u662f\u6253\u5f00\u6587\u4ef6\uff0c\u5360\u7528\u5f53\u524d\u7a97\u53e3\uff0c\u53ea\u8981\u6587\u4ef6\u6709\u65b0\u5185\u5bb9\u4ece\u5c3e\u90e8\u63d2\u5165\uff0c\u5c31\u7acb\u5373\u5c55\u793a\u51fa\u6765\u3002
\n\"\"<\/p>\n
6\uff09\u5c55\u793a\u6162[\u65e5\u5fd7]\u67e5\u8be2\uff1a
\n\u6d4b\u8bd5\uff1a<\/p>\n
select * from innodb;\n<\/code><\/pre>\n
\"\"
\n\u67e5\u8be2\u4f7f\u7528\u7684\u65f6\u5019\uff0c\u4e0d\u6ee1\u8db3\uff0c\u6240\u6709\u6ca1\u6709\u8bb0\u5f55\uff01<\/p>\n
\u6d4b\u8bd5\uff1a<\/p>\n
select * from myisam where content like '%CTO%';\n<\/code><\/pre>\n
\"\"
\n\u5df2\u7ecf\u6ee1\u8db3\u6761\u4ef6\uff0c\u65e5\u5fd7\u6587\u4ef6\u6709\u65b0\u5185\u5bb9\uff1a
\n\"\"<\/p>\n
7\uff09\u603b\u7ed3\uff1a
\n\u6162[\u65e5\u5fd7]\u67e5\u8be2\uff1a\u5f00\u542f\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u628asql\u8bed\u53e5\u6267\u884c\u6162\u7684\u8bb0\u5f55\u3002\u53ef\u4ee5\u9488\u5bf9\u6027\u7684\u5bf9sql\u8bed\u53e5\u4f18\u5316\u3002<\/p>\n
-f\u53c2\u6570\u975e\u5e38\u7684\u91cd\u8981\u3002\u5de5\u4f5c\u4e2d\uff0c\u96c6\u7fa4\u670d\u52a1\u5668\u51fa\u73b0\u95ee\u9898\u3002\u8bbf\u95ee\u7684\u65f6\u5019\uff0c\u6709\u65f6\u5019\u51fabug\uff0c\u6709\u65f6\u5019\u6ca1\u6709\u51fabug\u3002
\n\u6b64\u65f6\uff0c\u4f7f\u7528-f\u6253\u5f00\u5168\u90e8\u670d\u52a1\u5668\u65e5\u5fd7\u6587\u4ef6\u3002\u8bf7\u6c42\u670d\u52a1\u5668\u5185\u5bb9\u65f6\u6ca1\u6709\u51fa\u73b0bug\uff0c\u53ef\u4ee5\u7acb\u5373\u67e5\u770b\u54ea\u53f0\u670d\u52a1\u5668\u65e5\u5fd7\u6587\u4ef6\u6709\u65b0\u6d88\u606f\uff0c\u53ef\u4ee5\u7acb\u5373\u6392\u9664\u8fd9\u53f0\u670d\u52a1\u5668\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6162[\u65e5\u5fd7]\u67e5\u8be2\uff1a\u628asql\u8bed\u53e5\u6267\u884c\u6162\u7684\uff0c\u90fd\u8bb0\u5f55\u5230\u65e5\u5fd7\u6587\u4ef6\u91cc\u9762\u3002 \u5b9a\u65f6\u68c0\u67e5\u65e5\u5fd7\u6587\u4ef6\u5185\u5bb9\uff0c\u628asql\u8bed\u53e5\u6267\u884c… \u7ee7\u7eed\u9605\u8bfb \u6162\u65e5\u5fd7\u67e5\u8be2<\/span><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":{"0":"post-83","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-mysql","7":"h-entry","9":"h-as-article"},"_links":{"self":[{"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=\/wp\/v2\/posts\/83","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=83"}],"version-history":[{"count":0,"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=\/wp\/v2\/posts\/83\/revisions"}],"wp:attachment":[{"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=83"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=83"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/yanzhenhua.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=83"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}