{"id":93766,"date":"2024-10-19T16:44:17","date_gmt":"2024-10-19T08:44:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/93766\/"},"modified":"2024-10-19T16:44:18","modified_gmt":"2024-10-19T08:44:18","slug":"oracle-10g-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad-undo_retention-%e5%8f%83%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8%e8%a9%b3%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/93766\/","title":{"rendered":"Oracle 10g \u6578\u64da\u5eab\u4e2d UNDO_RETENTION \u53c3\u6578\u7684\u4f7f\u7528\u8a73\u89e3"},"content":{"rendered":"<h1 id=\"oracle-10g-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad-undo_retention-%e5%8f%83%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8%e8%a9%b3%e8%a7%a3-RFJyDabjpN\">Oracle 10g \u6578\u64da\u5eab\u4e2d UNDO_RETENTION \u53c3\u6578\u7684\u4f7f\u7528\u8a73\u89e3<\/h1>\n<p>\u5728 Oracle 10g \u6578\u64da\u5eab\u4e2d\uff0cUNDO_RETENTION \u53c3\u6578\u662f\u4e00\u500b\u95dc\u9375\u7684\u914d\u7f6e\u9078\u9805\uff0c\u5c0d\u65bc\u6578\u64da\u7684\u6062\u5fa9\u548c\u4fdd\u8b77\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e UNDO_RETENTION \u7684\u529f\u80fd\u3001\u914d\u7f6e\u65b9\u6cd5\u53ca\u5176\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-undo_retention%ef%bc%9f-RFJyDabjpN\">\u4ec0\u9ebc\u662f UNDO_RETENTION\uff1f<\/h2>\n<p>UNDO_RETENTION \u662f\u4e00\u500b\u7528\u65bc\u6307\u5b9a Oracle \u6578\u64da\u5eab\u4e2d UNDO \u6578\u64da\u4fdd\u7559\u6642\u9593\u7684\u53c3\u6578\u3002UNDO \u6578\u64da\u662f\u7528\u4f86\u652f\u6301\u6578\u64da\u5eab\u7684\u56de\u6efe\u64cd\u4f5c\uff0c\u7576\u7528\u6236\u57f7\u884c DML\uff08\u6578\u64da\u64cd\u7e31\u8a9e\u8a00\uff09\u64cd\u4f5c\u6642\uff0cOracle \u6703\u751f\u6210\u76f8\u61c9\u7684 UNDO \u6578\u64da\uff0c\u4ee5\u4fbf\u5728\u9700\u8981\u6642\u6062\u5fa9\u5230\u4e4b\u524d\u7684\u72c0\u614b\u3002<\/p>\n<p>\u5177\u9ad4\u4f86\u8aaa\uff0cUNDO_RETENTION \u53c3\u6578\u5b9a\u7fa9\u4e86 UNDO \u6578\u64da\u5728\u56de\u6efe\u6bb5\u4e2d\u4fdd\u7559\u7684\u6700\u5c0f\u6642\u9593\uff08\u4ee5\u79d2\u70ba\u55ae\u4f4d\uff09\u3002\u9019\u610f\u5473\u8457\uff0c\u7576\u4e00\u500b\u4e8b\u52d9\u63d0\u4ea4\u5f8c\uff0cOracle \u5c07\u81f3\u5c11\u4fdd\u7559\u8a72\u4e8b\u52d9\u7684 UNDO \u6578\u64da\uff0c\u76f4\u5230\u6307\u5b9a\u7684\u6642\u9593\u904e\u53bb\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81-undo_retention%ef%bc%9f-RFJyDabjpN\">\u70ba\u4ec0\u9ebc\u9700\u8981 UNDO_RETENTION\uff1f<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\uff0cUNDO \u6578\u64da\u7684\u4fdd\u7559\u6642\u9593\u5c0d\u65bc\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u81f3\u95dc\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u5e7e\u500b\u4e3b\u8981\u539f\u56e0\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u6062\u5fa9\uff1a<\/strong>\u7576\u7528\u6236\u9700\u8981\u56de\u6efe\u5230\u67d0\u500b\u7279\u5b9a\u7684\u6642\u9593\u9ede\u6642\uff0c\u8db3\u5920\u7684 UNDO \u6578\u64da\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002<\/li>\n<li><strong>\u67e5\u8a62\u4e00\u81f4\u6027\uff1a<\/strong>\u5728\u9577\u6642\u9593\u904b\u884c\u7684\u67e5\u8a62\u4e2d\uff0cUNDO \u6578\u64da\u53ef\u4ee5\u78ba\u4fdd\u67e5\u8a62\u7d50\u679c\u7684\u4e00\u81f4\u6027\uff0c\u907f\u514d\u56e0\u70ba\u5176\u4ed6\u4e8b\u52d9\u7684\u63d0\u4ea4\u800c\u5c0e\u81f4\u7684\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/li>\n<li><strong>\u652f\u6301\u9583\u56de\u67e5\u8a62\uff1a<\/strong>\u9583\u56de\u67e5\u8a62\u529f\u80fd\u4f9d\u8cf4\u65bc UNDO \u6578\u64da\uff0c\u5141\u8a31\u7528\u6236\u67e5\u770b\u904e\u53bb\u67d0\u4e00\u6642\u9593\u9ede\u7684\u6578\u64da\u72c0\u614b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e9%85%8d%e7%bd%ae-undo_retention%ef%bc%9f-RFJyDabjpN\">\u5982\u4f55\u914d\u7f6e UNDO_RETENTION\uff1f<\/h2>\n<p>\u914d\u7f6e UNDO_RETENTION \u53c3\u6578\u76f8\u5c0d\u7c21\u55ae\uff0c\u53ef\u4ee5\u901a\u904e SQL \u547d\u4ee4\u9032\u884c\u8a2d\u7f6e\u3002\u4ee5\u4e0b\u662f\u8a2d\u7f6e\u8a72\u53c3\u6578\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<pre><code>ALTER SYSTEM SET UNDO_RETENTION = 3600;<\/code><\/pre>\n<p>\u4e0a\u8ff0\u547d\u4ee4\u5c07 UNDO_RETENTION \u8a2d\u7f6e\u70ba 3600 \u79d2\uff08\u5373 1 \u5c0f\u6642\uff09\u3002\u9019\u610f\u5473\u8457\uff0cOracle \u5c07\u81f3\u5c11\u4fdd\u7559 UNDO \u6578\u64da 1 \u5c0f\u6642\uff0c\u4ee5\u4fbf\u7528\u6236\u53ef\u4ee5\u9032\u884c\u56de\u6efe\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e7%9b%a3%e6%8e%a7-undo_retention-%e7%9a%84%e6%95%88%e6%9e%9c-RFJyDabjpN\">\u76e3\u63a7 UNDO_RETENTION \u7684\u6548\u679c<\/h2>\n<p>\u70ba\u4e86\u78ba\u4fdd UNDO_RETENTION \u7684\u8a2d\u7f6e\u80fd\u5920\u6709\u6548\u904b\u884c\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u9700\u8981\u5b9a\u671f\u76e3\u63a7 UNDO \u4f7f\u7528\u60c5\u6cc1\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u6aa2\u67e5\u7576\u524d\u7684 UNDO \u4f7f\u7528\u60c5\u6cc1\uff1a<\/p>\n<pre><code>SELECT \n    a.tablespace_name, \n    a.bytes \/ 1024 \/ 1024 AS \"Size (MB)\", \n    b.value AS \"Undo Retention (sec)\"\nFROM \n    dba_data_files a, \n    v$parameter b\nWHERE \n    a.tablespace_name = 'UNDOTBS1' \n    AND b.name = 'undo_retention';<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u986f\u793a UNDO \u8868\u7a7a\u9593\u7684\u5927\u5c0f\u4ee5\u53ca\u7576\u524d\u7684 UNDO_RETENTION \u8a2d\u7f6e\uff0c\u5e6b\u52a9\u7ba1\u7406\u54e1\u8a55\u4f30\u662f\u5426\u9700\u8981\u8abf\u6574\u53c3\u6578\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-RFJyDabjpN\">\u7d50\u8ad6<\/h2>\n<p>UNDO_RETENTION \u53c3\u6578\u5728 Oracle 10g \u6578\u64da\u5eab\u4e2d\u626e\u6f14\u8457\u91cd\u8981\u89d2\u8272\uff0c\u5c0d\u65bc\u6578\u64da\u7684\u6062\u5fa9\u548c\u67e5\u8a62\u4e00\u81f4\u6027\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u5408\u7406\u914d\u7f6e\u548c\u76e3\u63a7\u8a72\u53c3\u6578\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u5b8c\u6574\u6027\uff0c\u5f9e\u800c\u63d0\u9ad8\u6574\u9ad4\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0e Oracle 10g \u6578\u64da\u5eab\u4e2d UNDO_RETENTION \u53c3\u6578\u7684\u8a2d\u5b9a\u8207\u61c9\u7528\uff0c\u63d0\u5347\u6578\u64da\u6062\u5fa9\u6548\u7387\u8207\u6027\u80fd\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-93766","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93766","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=93766"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93766\/revisions"}],"predecessor-version":[{"id":93767,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93766\/revisions\/93767"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=93766"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=93766"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=93766"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}