{"id":115513,"date":"2026-10-12T10:57:02","date_gmt":"2026-10-12T02:57:02","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/115513.html"},"modified":"2026-10-12T10:57:02","modified_gmt":"2026-10-12T02:57:02","slug":"enq-tx-index-contention%ef%bc%88%e7%b4%a2%e5%bc%95%e5%88%86%e8%a3%82%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/115513.html","title":{"rendered":"enq: TX - index contention\uff08\u7d22\u5f15\u5206\u88c2\uff09"},"content":{"rendered":"<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\"><span style=\"background-color:white\">\u539f\u56e0&#xff1a;<\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\">\u00a0<span style=\"background-color:white\">\u4e00\u822c\u51fa\u73b0\u5728\u5bf9\u8868\u7684\u9ad8\u5e76\u53d1\u7684<\/span><span style=\"background-color:white\">DML<\/span><span style=\"background-color:white\">\u64cd\u4f5c\u65f6&#xff0c;\u5f53\u4e00\u4e2a\u4e8b\u52a1\u9700\u8981\u5411\u4e00\u4e2a\u7d22\u5f15\u5757\u63d2\u5165\u6570\u636e\u65f6&#xff0c;\u8be5\u7d22\u5f15\u5757\u6b63\u597d\u53d1\u751f\u4e86\u7d22\u5f15\u5206\u88c2&#xff0c;\u5219\u63d2\u5165\u4e8b\u52a1\u9700\u8981\u7b49\u5f85\u5206\u88c2\u4e8b\u52a1<\/span> <span style=\"background-color:white\">\u200b\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\">\u00a0<\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\"><span style=\"background-color:white\">\u5206\u6790&#xff1a;<\/span> <\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\"><span style=\"background-color:white\">\u67e5\u627e\u5206\u88c2\u5bf9\u8c61&#xff1a;<\/span> <\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\"><span style=\"background-color:white\">\u65b9\u6cd5<\/span><span style=\"background-color:white\">1<\/span><span style=\"background-color:white\">&#xff1a;\u67e5\u770b\u8be5\u7b49\u5f85\u4e8b\u4ef6\u5bf9\u5e94<\/span><span style=\"background-color:white\">SQL<\/span><span style=\"background-color:white\">\u7684\u6267\u884c\u8ba1\u5212&#xff0c;\u68c0\u67e5\u8fd9\u4e9b<\/span><span style=\"background-color:white\">SQL<\/span><span style=\"background-color:white\">\u6267\u884c\u4e2d\u6b63\u5728\u4f7f\u7528\u7684\u7d22\u5f15\u5bf9\u8c61\u662f\u54ea\u4e9b\u3002<\/span> <\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\"><span style=\"background-color:white\">\u65b9\u6cd5<\/span><span style=\"background-color:white\">2<\/span><span style=\"background-color:white\">&#xff1a;\u6536\u96c6\u95ee\u9898\u65f6\u6bb5\u7684<\/span><span style=\"background-color:white\">AWR<\/span><span style=\"background-color:white\">\u62a5\u544a&#xff0c;\u68c0\u67e5<\/span><span style=\"background-color:white\">Segments by Row Lock Waits<\/span><span style=\"background-color:white\">\u90e8\u5206\u6307\u6807\u3002<\/span> <span style=\"background-color:white\">\u200b\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\">\u00a0<\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\">\u00a0<span style=\"background-color:white\">\u5904\u7406&#xff1a;<\/span> <\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\"><span style=\"background-color:white\">\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u4e25\u91cd\u7a0b\u5ea6\u8fdb\u884c\u5982\u4e0b\u7d27\u6025\u5904\u7406&#xff1a;<\/span> <\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\"><span style=\"background-color:white\">a)<\/span><span style=\"background-color:white\">\u964d\u4f4e\u5e94\u7528\u5e76\u53d1\u5ea6&#xff0c;\u964d\u4f4e<\/span><span style=\"background-color:white\">index<\/span><span style=\"background-color:white\">\u4e89\u7528&#xff1b;<\/span> <\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\"><span style=\"background-color:white\">b)<\/span><span style=\"background-color:white\">\u4f7f\u7528\u53cd\u5411\u7d22\u5f15\u91cd\u5efa&#xff08;\u63d0\u5347\u4e86\u5199\u6027\u80fd&#xff0c;\u964d\u4f4e\u4e86\u8bfb\u6027\u80fd&#xff09;&#xff0c;\u6216\u4f7f\u7528<\/span><span style=\"background-color:white\">hash<\/span><span style=\"background-color:white\">\u5206\u533a\u91cd\u5efa\u7d22\u5f15&#xff1b;<\/span> <span style=\"background-color:white\">\u5982\u7d22\u5f15\u5b57\u6bb5\u4f7f\u7528<\/span><span style=\"background-color:white\">sequence<\/span><span style=\"background-color:white\">&#xff0c;\u53ef\u8003\u8651\u589e\u52a0<\/span><span style=\"background-color:white\">sequence cache<\/span><span style=\"background-color:white\">\u6765\u589e\u52a0\u952e\u503c\u8df3\u5ea6\u907f\u514d\u4e89\u7528<\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\">\u00a0<\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\">\u00a0<\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\"><span style=\"background-color:white\">&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\">\u00a0<\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:#333333\">\u00a0<\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\">\u3010\u6545\u969c\u73b0\u8c61\u3011<\/p>\n<p style=\"margin-left:0;margin-right:0\">\u67d0\u4e9bDML\u8bed\u53e5\u6267\u884c\u7f13\u6162&#xff0c;\u67e5\u8be2\u7b49\u5f85\u4e8b\u4ef6\u51fa\u73b0\u201cenq: TX &#8211; index contention\u201d\u7b49\u5f85\u3002<\/p>\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\">\u3010\u53ef\u80fd\u6545\u969c\u539f\u56e0\u3011<\/p>\n<ul>\n<li>\u4e00\u822c\u51fa\u73b0\u5728\u5bf9\u8868\u7684\u9ad8\u5e76\u53d1\u7684DML\u64cd\u4f5c\u65f6&#xff0c;\u5f53\u4e00\u4e2a\u4e8b\u52a1\u9700\u8981\u5411\u4e00\u4e2a\u7d22\u5f15\u5757\u63d2\u5165\u6570\u636e\u65f6&#xff0c;\u8be5\u7d22\u5f15\u5757\u6b63\u597d\u53d1\u751f\u4e86\u7d22\u5f15\u5206\u88c2&#xff0c;\u5219\u63d2\u5165\u4e8b\u52a1\u9700\u8981\u7b49\u5f85\u5206\u88c2\u4e8b\u52a1&#xff1b;<\/li>\n<\/ul>\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\">\u3010\u5e94\u6025\u63aa\u65bd\u3011<\/p>\n<p style=\"margin-left:0;margin-right:0\">\u67e5\u627e\u662f\u54ea\u4e9bSQL\u8bed\u53e5\u5bfc\u81f4\u5927\u91cf\u7684\u4e89\u7528&#xff1a;<\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:black\"><span style=\"background-color:#d9d9d9\">set line 200<\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:black\"><span style=\"background-color:#d9d9d9\">select inst_id,sid,event,sql_id from gv$session <\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:black\"><span style=\"background-color:#d9d9d9\">where event&#061;\u2019enq: TX &#8211; index contention\u2019<\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:black\"><span style=\"background-color:#d9d9d9\">order by sql_id;<\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\">\u67e5\u770b\u6267\u884c\u8ba1\u5212&#xff0c;\u68c0\u67e5\u8fd9\u4e9bSQL\u6267\u884c\u4e2d\u6b63\u5728\u4f7f\u7528\u7684\u7d22\u5f15\u5bf9\u8c61\u662f\u54ea\u4e9b&#xff1a;<\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:black\"><span style=\"background-color:#d9d9d9\">set line 200 pagesize 100<\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:black\"><span style=\"background-color:#d9d9d9\">select * from table(dbms_xplan.display_cursor(\u2018&amp;sqlid\u2019));<\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\">\u6216\u8005\u91c7\u53d6\u66f4\u7b80\u4fbf\u7684\u65b9\u6cd5&#xff0c;\u6536\u96c6\u95ee\u9898\u65f6\u6bb5\u7684AWR\u62a5\u544a&#xff0c;\u68c0\u67e5Segments by Row Lock Waits\u90e8\u5206\u6307\u6807&#xff1a;<\/p>\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"272\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261012025701-6acc4c7d643be.jpg\" width=\"864\" \/><\/p>\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\">\u624b\u5de5\u4ea7\u751f\u4e00\u4e2aAWR\u5feb\u7167\u7684\u65b9\u6cd5\u5982\u4e0b&#xff1a;<\/p>\n<p style=\"margin-left:0;margin-right:0\"><span style=\"color:black\"><span style=\"background-color:#d9d9d9\">exec DBMS_WORKLOAD_REPOSITORY.create_snapshot();<\/span><\/span><\/p>\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\">\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u4e25\u91cd\u7a0b\u5ea6\u8fdb\u884c\u5982\u4e0b\u7d27\u6025\u5904\u7406&#xff1a;<\/p>\n<li>\u964d\u4f4e\u5e94\u7528\u5e76\u53d1\u5ea6&#xff0c;\u964d\u4f4eindex\u4e89\u7528&#xff1b;<\/li>\n<li>\u4f7f\u7528<span style=\"color:red\">\u53cd\u5411\u952e\u7d22\u5f15\u91cd\u5efa<\/span>&#xff0c;\u6216\u4f7f\u7528hash\u5206\u533a\u91cd\u5efa\u7d22\u5f15&#xff1b;&#xff08;\u53ef\u4ee5&#xff0c;\u4f46\u662f\u5218\u8001\u864e\u4e0d\u63a8\u8350&#xff0c;\u4e0d\u80fd\u505a\u8303\u56f4\u67e5\u627e&#xff0c;\u7d22\u5f15\u5757\u5360\u5185\u5b58\u6bd4\u8f83\u591a&#xff09;<\/li>\n<li>\u5982\u7d22\u5f15\u5b57\u6bb5\u4f7f\u7528sequence&#xff0c;\u53ef\u8003\u8651\u589e\u52a0sequence cache\u6765\u589e\u52a0\u952e\u503c\u8df3\u5ea6\u907f\u514d\u4e89\u7528\u3002<\/li>\n<p style=\"margin-left:0;margin-right:0\">\n<p style=\"margin-left:0;margin-right:0\">\u3010\u540e\u7eed\u5206\u6790\u3011<\/p>\n<p style=\"margin-left:0;margin-right:0\">\u8be5\u7b49\u5f85\u4e00\u822c\u7531\u4e8e\u4e1a\u52a1\u7e41\u5fd9\u5bfc\u81f4&#xff0c;\u901a\u8fc7\u964d\u4f4e\u5e76\u53d1\u6216\u8c03\u6574\u7d22\u5f15\u53ef\u4ee5\u907f\u514d&#xff0c;\u53cd\u5411\u7d22\u5f15\u7531\u4e8e\u5bf9\u8303\u56f4\u67e5\u8be2\u6709\u4e00\u5b9a\u5f71\u54cd&#xff0c;\u9700\u8981\u8fdb\u884c\u8bc4\u4f30&#xff0c;hash\u7d22\u5f15\u5206\u533a\u4e5f\u53ef\u4ee5\u4e00\u5b9a\u7a0b\u5ea6\u907f\u514d\u4e89\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u539f\u56e0&#xff1a;\u4e00\u822c\u51fa\u73b0\u5728\u5bf9\u8868\u7684\u9ad8\u5e76\u53d1\u7684DML\u64cd\u4f5c\u65f6&#xff0c;\u5f53\u4e00\u4e2a\u4e8b\u52a1\u9700\u8981\u5411\u4e00\u4e2a\u7d22\u5f15\u5757\u63d2\u5165\u6570\u636e\u65f6&#xff0c;\u8be5\u7d22\u5f15\u5757\u6b63\u597d\u53d1\u751f\u4e86\u7d22\u5f15\u5206\u88c2&#xff0c;\u5219\u63d2\u5165\u4e8b\u52a1\u9700\u8981\u7b49\u5f85\u5206\u88c2\u4e8b\u52a1 \u200b\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5206\u6790&#xff1a; \u67e5\u627e\u5206\u88c2\u5bf9\u8c61&#xff1a; \u65b9\u6cd51&#xff1a;\u67e5\u770b\u8be5\u7b49\u5f85\u4e8b\u4ef6\u5bf9\u5e94SQL\u7684\u6267\u884c\u8ba1\u5212&#xff0c;\u68c0\u67e5\u8fd9\u4e9bSQL\u6267\u884c\u4e2d\u6b63\u5728\u4f7f\u7528\u7684\u7d22\u5f15\u5bf9\u8c61\u662f\u54ea\u4e9b\u3002 \u65b9\u6cd52&#xff1a;\u6536\u96c6\u95ee\u9898\u65f6\u6bb5\u7684AWR\u62a5\u544a&#xff0c;\u68c0<\/p>\n","protected":false},"author":2,"featured_media":115512,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99,100,43],"topic":[],"class_list":["post-115513","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-java","tag-100","tag-43"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>enq: TX - index contention\uff08\u7d22\u5f15\u5206\u88c2\uff09 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/115513.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"enq: TX - index contention\uff08\u7d22\u5f15\u5206\u88c2\uff09 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u539f\u56e0&#xff1a;\u4e00\u822c\u51fa\u73b0\u5728\u5bf9\u8868\u7684\u9ad8\u5e76\u53d1\u7684DML\u64cd\u4f5c\u65f6&#xff0c;\u5f53\u4e00\u4e2a\u4e8b\u52a1\u9700\u8981\u5411\u4e00\u4e2a\u7d22\u5f15\u5757\u63d2\u5165\u6570\u636e\u65f6&#xff0c;\u8be5\u7d22\u5f15\u5757\u6b63\u597d\u53d1\u751f\u4e86\u7d22\u5f15\u5206\u88c2&#xff0c;\u5219\u63d2\u5165\u4e8b\u52a1\u9700\u8981\u7b49\u5f85\u5206\u88c2\u4e8b\u52a1 \u200b\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5206\u6790&#xff1a; \u67e5\u627e\u5206\u88c2\u5bf9\u8c61&#xff1a; \u65b9\u6cd51&#xff1a;\u67e5\u770b\u8be5\u7b49\u5f85\u4e8b\u4ef6\u5bf9\u5e94SQL\u7684\u6267\u884c\u8ba1\u5212&#xff0c;\u68c0\u67e5\u8fd9\u4e9bSQL\u6267\u884c\u4e2d\u6b63\u5728\u4f7f\u7528\u7684\u7d22\u5f15\u5bf9\u8c61\u662f\u54ea\u4e9b\u3002 \u65b9\u6cd52&#xff1a;\u6536\u96c6\u95ee\u9898\u65f6\u6bb5\u7684AWR\u62a5\u544a&#xff0c;\u68c0\" \/>\n<meta property=\"og:url\" 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