{"id":24,"date":"2012-03-24T13:38:29","date_gmt":"2012-03-24T05:38:29","guid":{"rendered":"http:\/\/blog.thephper.com\/?p=24"},"modified":"2012-03-24T13:40:13","modified_gmt":"2012-03-24T05:40:13","slug":"%e7%89%b9%e5%ae%9a%e5%9c%ba%e6%99%af%e4%b8%8b%ef%bc%8c%e5%88%ab%e5%bf%98%e4%ba%86optimize-table","status":"publish","type":"post","link":"https:\/\/thephper.com\/?p=24","title":{"rendered":"\u7279\u5b9a\u573a\u666f\u4e0b\uff0c\u522b\u5fd8\u4e86optimize table"},"content":{"rendered":"

\u524d\u51e0\u65e5\uff0c\u4ece\u65e5\u5fd7\u53d1\u73b0\u4e2a\u8bf7\u6c42\u76f8\u5e94\u5f02\u5e38\u6162\uff0c\u770b\u4e86\u4e0b\uff0c\u662f\u4e2a\u7528mysql\u5b9e\u73b0\u7684\u4e00\u4e2a\u4efb\u52a1\u961f\u5217\uff0c\u767b\u5f55\u4e0a\u53bb<\/p>\n

show processlist<\/pre>\n
\u53d1\u73b0\u67d0\u8bed\u53e5\u6267\u884c\u5f02\u5e38\u6162\uff0c\u633a\u5947\u602a\uff0c\u4e00\u4e2a\u5e38\u5e74\u53ea\u6709\u51e0\u767e\u884c\u7684\u8868\uff0c\u600e\u4e48\u4f1a\u8fd9\u4e48\u6162\u5462<\/p>\n
show table status\uff1b<\/pre>\n
t_task \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | MyISAM |\u00a0\u00a0\u00a0\u00a0\u00a0 10 | Dynamic\u00a0\u00a0\u00a0 |\u00a0\u00a0\u00a0\u00a0\u00a0 84 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 346 |\u00a0\u00a0\u00a0 19547784 |\u00a0\u00a0\u00a0 281474976710655 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 705536 |\u00a0 19518652 |\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 NULL | 2011-11-20 09:38:20 | 2012-03-15 16:30:03 | NULL\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | utf8_general_ci |\u00a0\u00a0\u00a0\u00a0 NULL |<\/pre>\n
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\u604d\u7136\u5927\u609f<\/div>\n
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346\u884c\u6570\u636e\uff0c\u5374\u670919M\u4e86<\/div>\n
optimize table t_task<\/pre>\n
ok\uff0c\u95ee\u9898\u89e3\u51b3<\/div>\n
\u539f\u56e0\u5206\u6790\uff1a\u53ef\u53d8\u957f\u5ea6\u8868\uff0c\u5927\u91cf\u7684\u63d2\u5165\u5220\u9664\uff0c\u6570\u636e\u6587\u4ef6\u788e\u7247\u592a\u591a\uff0c\u5bfc\u81f4\u5f02\u5e38<\/div>\n
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\u7ed3\u8bba\uff1a\u53ef\u53d8\u957f\u5ea6\uff0c\u5b58\u5728\u5927\u91cf\u63d2\u5165\u5220\u9664\u4fee\u6539\u64cd\u4f5c\u7684\u8868\uff0c\u522b\u5fd8\u4e86\u65f6\u5e38optimize\u4e00\u4e0b\uff0c\u4e5f\u53ef\u914c\u60c5\u8003\u8651\u6539\u6210\u5b9a\u957f\u7684\uff08ps\uff1a\u5bf9\u4e8eutf8\u6765\u8bf4\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u5b9a\u957f\uff0cchar\uff081\uff09\u5373\u4f7f\u662f\u63d2\u51651\u4e2a\u6570\u5b57\uff0c\u4e5f\u662f3\u5b57\u8282\u54e6\uff09<\/strong><\/span><\/div>\n
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<\/div>\n
\u770b\u4e0b\u624b\u518c\u600e\u4e48\u8bf4\u7684optimize table<\/a>\u5427\uff0c\u4e2d\u6587\u7248\uff1a<\/div>\n
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<\/a>13.5.2.5. OPTIMIZE TABLE\u8bed\u6cd5<\/h4>\n<\/div>\n<\/div>\n<\/div>\n
<\/a><\/a><\/a><\/p>\n
OPTIMIZE [LOCAL | NO_WRITE_TO_BINLOG] TABLE tbl_name<\/em> [, tbl_name<\/em>] ...<\/pre>\n
\u5982\u679c\u60a8\u5df2\u7ecf\u5220\u9664\u4e86\u8868\u7684\u4e00\u5927\u90e8\u5206\uff0c\u6216\u8005\u5982\u679c\u60a8\u5df2\u7ecf\u5bf9\u542b\u6709\u53ef\u53d8\u957f\u5ea6\u884c\u7684\u8868\uff08\u542b\u6709VARCHAR, BLOB\u6216TEXT\u5217\u7684\u8868\uff09\u8fdb\u884c\u4e86\u5f88\u591a\u66f4\u6539\uff0c\u5219\u5e94\u4f7f\u7528OPTIMIZE TABLE\u3002\u88ab\u5220\u9664\u7684\u8bb0\u5f55\u88ab\u4fdd\u6301\u5728\u94fe\u63a5\u6e05\u5355\u4e2d\uff0c\u540e\u7eed\u7684INSERT\u64cd\u4f5c\u4f1a\u91cd\u65b0\u4f7f\u7528\u65e7\u7684\u8bb0\u5f55\u4f4d\u7f6e\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528OPTIMIZE TABLE\u6765\u91cd\u65b0\u5229\u7528\u672a\u4f7f\u7528\u7684\u7a7a\u95f4\uff0c\u5e76\u6574\u7406\u6570\u636e\u6587\u4ef6\u7684\u788e\u7247\u3002<\/p>\n
\u5728\u591a\u6570\u7684\u8bbe\u7f6e\u4e2d\uff0c\u60a8\u6839\u672c\u4e0d\u9700\u8981\u8fd0\u884cOPTIMIZE TABLE\u3002\u5373\u4f7f\u60a8\u5bf9\u53ef\u53d8\u957f\u5ea6\u7684\u884c\u8fdb\u884c\u4e86\u5927\u91cf\u7684\u66f4\u65b0\uff0c\u60a8\u4e5f\u4e0d\u9700\u8981\u7ecf\u5e38\u8fd0\u884c\uff0c\u6bcf\u5468\u4e00\u6b21\u6216\u6bcf\u6708\u4e00\u6b21\u5373\u53ef\uff0c\u53ea\u5bf9\u7279\u5b9a\u7684\u8868\u8fd0\u884c\u3002<\/p>\n
OPTIMIZE TABLE\u53ea\u5bf9MyISAM, BDB\u548cInnoDB\u8868\u8d77\u4f5c\u7528\u3002<\/p>\n
\u5bf9\u4e8eMyISAM\u8868\uff0cOPTIMIZE TABLE\u6309\u5982\u4e0b\u65b9\u5f0f\u64cd\u4f5c\uff1a<\/p>\n
1. \u5982\u679c\u8868\u5df2\u7ecf\u5220\u9664\u6216\u5206\u89e3\u4e86\u884c\uff0c\u5219\u4fee\u590d\u8868\u3002<\/p>\n
2. \u5982\u679c\u672a\u5bf9\u7d22\u5f15\u9875\u8fdb\u884c\u5206\u7c7b\uff0c\u5219\u8fdb\u884c\u5206\u7c7b\u3002<\/p>\n
3. \u5982\u679c\u8868\u7684\u7edf\u8ba1\u6570\u636e\u6ca1\u6709\u66f4\u65b0\uff08\u5e76\u4e14\u901a\u8fc7\u5bf9\u7d22\u5f15\u8fdb\u884c\u5206\u7c7b\u4e0d\u80fd\u5b9e\u73b0\u4fee\u590d\uff09\uff0c\u5219\u8fdb\u884c\u66f4\u65b0\u3002<\/p>\n
\u5bf9\u4e8eBDB\u8868\uff0cOPTIMIZE TABLE\u76ee\u524d\u88ab\u6620\u5c04\u5230ANALYZE TABLE\u4e0a\u3002\u5bf9\u4e8eInnoDB\u8868\uff0cOPTIMIZE TABLE\u88ab\u6620\u5c04\u5230ALTER TABLE\u4e0a\uff0c\u8fd9\u4f1a\u91cd\u5efa\u8868\u3002\u91cd\u5efa\u64cd\u4f5c\u80fd\u66f4\u65b0\u7d22\u5f15\u7edf\u8ba1\u6570\u636e\u5e76\u91ca\u653e\u6210\u7c07\u7d22\u5f15\u4e2d\u7684\u672a\u4f7f\u7528\u7684\u7a7a\u95f4\u3002\u8bf7\u53c2\u89c113.5.2.1\u8282\uff0c\u201cANALYZE TABLE\u8bed\u6cd5\u201d<\/a>\u3002<\/p>\n
\u4f7f\u7528\u2014skip-new\u6216\u2014safe-mode\u9009\u9879\u53ef\u4ee5\u542f\u52a8mysqld\u3002\u901a\u8fc7\u542f\u52a8mysqld\uff0c\u60a8\u53ef\u4ee5\u4f7fOPTIMIZE TABLE\u5bf9\u5176\u5b83\u8868\u7c7b\u578b\u8d77\u4f5c\u7528\u3002<\/p>\n
\u6ce8\u610f\uff0c\u5728OPTIMIZE TABLE\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0cMySQL\u4f1a\u9501\u5b9a\u8868\u3002<\/p>\n
OPTIMIZE TABLE\u8bed\u53e5\u88ab\u5199\u5165\u5230\u4e8c\u8fdb\u5236\u65e5\u5fd7\u4e2d\uff0c\u9664\u975e\u4f7f\u7528\u4e86\u81ea\u9009\u7684NO_WRITE_TO_BINLOG\u5173\u952e\u8bcd\uff08\u6216\u5176\u522b\u540dLOCAL\uff09\u3002\u5df2\u7ecf\u8fd9\u4e48\u505a\u4e86\uff0c\u56e0\u6b64\uff0c\u7528\u4e8eMySQL\u670d\u52a1\u5668\u7684OPTIMIZE TABLE\u547d\u4ee4\u7684\u4f5c\u7528\u76f8\u5f53\u4e8e\u4e00\u4e2a\u590d\u5236\u4e3b\u670d\u52a1\u5668\uff0c\u5728\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e9b\u547d\u4ee4\u5c06\u88ab\u590d\u5236\u5230\u590d\u5236\u4ece\u5c5e\u670d\u52a1\u5668\u4e2d\u3002<\/p><\/blockquote>\n<\/div>\n<\/div>\n
<\/div>\n","protected":false},"excerpt":{"rendered":"
\u524d\u51e0\u65e5\uff0c\u4ece\u65e5\u5fd7\u53d1\u73b0\u4e2a\u8bf7\u6c42\u76f8\u5e94\u5f02\u5e38\u6162\uff0c\u770b\u4e86\u4e0b\uff0c\u662f\u4e2a\u7528mysql\u5b9e\u73b0\u7684\u4e00\u4e2a\u4efb\u52a1\u961f\u5217\uff0c … \u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[13],"_links":{"self":[{"href":"https:\/\/thephper.com\/index.php?rest_route=\/wp\/v2\/posts\/24"}],"collection":[{"href":"https:\/\/thephper.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thephper.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thephper.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/thephper.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=24"}],"version-history":[{"count":4,"href":"https:\/\/thephper.com\/index.php?rest_route=\/wp\/v2\/posts\/24\/revisions"}],"predecessor-version":[{"id":28,"href":"https:\/\/thephper.com\/index.php?rest_route=\/wp\/v2\/posts\/24\/revisions\/28"}],"wp:attachment":[{"href":"https:\/\/thephper.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=24"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thephper.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thephper.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}