{"id":66,"date":"2023-11-29T11:13:05","date_gmt":"2023-11-29T03:13:05","guid":{"rendered":"http:\/\/www.ooboou.com\/?p=66"},"modified":"2023-11-29T11:13:05","modified_gmt":"2023-11-29T03:13:05","slug":"%e5%88%a9%e7%94%a8vsession_longops%e7%9b%91%e6%8e%a7%e9%95%bf%e6%97%b6%e9%97%b4%e8%bf%90%e8%a1%8c%e7%9a%84%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"http:\/\/www.ooboou.com\/?p=66","title":{"rendered":"\u5229\u7528V$SESSION_LONGOPS\u76d1\u63a7\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u64cd\u4f5c"},"content":{"rendered":"\n<p>\u4e00\u3001\u4ec0\u4e48\u60c5\u51b5\u4e0b\uff0c\u64cd\u4f5c\u4fe1\u606f\u4f1a\u51fa\u73b0\u5728V$SESSION_LONGOPS<\/p>\n\n\n\n<p>\u540c\u65f6\u6ee1\u8db3\u4ee5\u4e0b\u51e0\u4e2a\u6761\u4ef6\uff0c\u64cd\u4f5c\u4fe1\u606f\u624d\u4f1a\u51fa\u73b0\u5728V$SESSION_LONGOPS\u4e2d\u3002<\/p>\n\n\n\n<p>1\u3001\u64cd\u4f5c\u662f\u4ee5\u4e0b\u51e0\u79cd\u64cd\u4f5c\u4e4b\u4e00<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">Table scan;<\/h6>\n\n\n\n<h6 class=\"wp-block-heading\">Index Fast Full Scan;<\/h6>\n\n\n\n<h6 class=\"wp-block-heading\">Hash join;<\/h6>\n\n\n\n<h6 class=\"wp-block-heading\">Sort\/Merge;<\/h6>\n\n\n\n<h6 class=\"wp-block-heading\">Sort Output;<\/h6>\n\n\n\n<h6 class=\"wp-block-heading\">Rollback;<\/h6>\n\n\n\n<h6 class=\"wp-block-heading\">Gather Table&#8217;s Index Statistics<\/h6>\n\n\n\n<p>\u4e0d\u540c\u7684\u7248\u672c\u4e0bV$SESSION_LONGOPS\u8bb0\u5f55\u7684\u64cd\u4f5c\u53ef\u80fd\u4f1a\u4e0d\u4e00\u6837\u3002<\/p>\n\n\n\n<p>2\u3001\u64cd\u4f5c\u65f6\u95f4\u5927\u4e8e6\u79d2<\/p>\n\n\n\n<p>3\u3001\u8bfb\u53d6\u7684block\u6570\u76ee\u5927\u4e8e\u4e00\u5b9a\u91cf<\/p>\n\n\n\n<p>1\uff09\u5982\u679c\u662fTABLE FULL SCAN\uff0c\u8bfb\u53d6\u7684block\u6570\u76ee\u81f3\u5c11\u5927\u4e8e10000<br>2\uff09\u5982\u679c\u662fIndex Fast Full Scan\uff0c\u8bfb\u53d6\u7684block\u6570\u76ee\u81f3\u5c11\u5927\u4e8e1000<br>3\uff09\u5176\u4ed6\u64cd\u4f5c\u8bfb\u53d6block\u7684\u6570\u76ee\u4e0d\u660e<\/p>\n\n\n\n<p>\u4ee5\u4e0a\u60c5\u51b5\u5f88\u6709\u53ef\u80fd\u662f\u9700\u8981\u6570\u636e\u5e93\u6027\u80fd\u4f18\u5316\u7684\uff0c\u53ef\u4ee5\u901a\u8fc7V$SESSION_LONGOPS\u627e\u51fa\u957f\u65f6\u95f4\u8fd0\u884c\u7684SQL\u8bed\u53e5\uff0c\u7136\u540e\u518d\u6765\u60f3\u529e\u6cd5\u4f18\u5316\uff0c\u5177\u4f53\u65b9\u6cd5\u5982\u4e0b\uff1a<br>select * from V$session_Longops a where a.SOFAR &lt; a.TOTALWORK<br>\u627e\u51fa\u957f\u65f6\u95f4\u4e3a\u5b8c\u6210\u7684\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>select *<br>from V$sqlarea b<br>where b.SQL_ID in<br>(select sql_id from V$session_Longops a where a.SOFAR &lt; a.TOTALWORK)<br>\u627e\u51fa\u5177\u4f53\u8fd0\u884c\u7684SQL\u8bed\u53e5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u4ec0\u4e48\u60c5\u51b5\u4e0b\uff0c\u64cd\u4f5c\u4fe1\u606f\u4f1a\u51fa\u73b0\u5728V$SESSION_LONGOPS \u540c\u65f6\u6ee1\u8db3\u4ee5\u4e0b\u51e0\u4e2a\u6761\u4ef6\uff0c\u64cd\u4f5c\u4fe1\u606f\u624d\u4f1a\u51fa\u73b0\u5728V &#8230; <a title=\"\u5229\u7528V$SESSION_LONGOPS\u76d1\u63a7\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u64cd\u4f5c\" class=\"read-more\" href=\"http:\/\/www.ooboou.com\/?p=66\" aria-label=\"\u9605\u8bfb \u5229\u7528V$SESSION_LONGOPS\u76d1\u63a7\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u64cd\u4f5c\">\u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[7,8,9],"class_list":["post-66","post","type-post","status-publish","format-standard","hentry","category-oracle","tag-it","tag-oracle","tag-sql"],"_links":{"self":[{"href":"http:\/\/www.ooboou.com\/index.php?rest_route=\/wp\/v2\/posts\/66","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.ooboou.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.ooboou.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.ooboou.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.ooboou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=66"}],"version-history":[{"count":1,"href":"http:\/\/www.ooboou.com\/index.php?rest_route=\/wp\/v2\/posts\/66\/revisions"}],"predecessor-version":[{"id":67,"href":"http:\/\/www.ooboou.com\/index.php?rest_route=\/wp\/v2\/posts\/66\/revisions\/67"}],"wp:attachment":[{"href":"http:\/\/www.ooboou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=66"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.ooboou.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=66"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.ooboou.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=66"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}