{"id":957,"date":"2012-06-25T23:07:16","date_gmt":"2012-06-25T15:07:16","guid":{"rendered":"https:\/\/yangtingkun.net\/?p=957"},"modified":"2012-06-27T09:12:41","modified_gmt":"2012-06-27T01:12:41","slug":"%e8%ae%be%e7%bd%ae%e5%85%a8%e5%b1%80%e6%ad%bb%e9%94%81%e4%bc%98%e5%85%88%e7%ba%a7","status":"publish","type":"post","link":"https:\/\/yangtingkun.net\/?p=957","title":{"rendered":"\u8bbe\u7f6e\u5168\u5c40\u6b7b\u9501\u4f18\u5148\u7ea7"},"content":{"rendered":"<p>\u6d4b\u8bd5\u63a7\u5236\u5168\u5c40\u6b7b\u9501\u7684\u9690\u542b\u53c2\u6570_lm_dd_interval\u65f6\uff0c\u7a81\u7136\u60f3\u5230\u8fd9\u4e2a\u95ee\u9898\u3002<br \/>\nRAC\u5168\u5c40\u6b7b\u9501\u68c0\u6d4b\u65f6\u95f4\uff1a<a href=\"https:\/\/yangtingkun.net\/?p=955\">https:\/\/yangtingkun.net\/?p=955<\/a><br \/>\nOracle\u7684\u6b7b\u9501\u5224\u65ad\u662f\u6ca1\u6709\u4f18\u5148\u7ea7\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5f53\u4e24\u4e2a\u6216\u591a\u4e2a\u4f1a\u8bdd\u53d1\u751f\u6b7b\u9501\u7684\u65f6\u5019\uff0c\u65e0\u6cd5\u6307\u5b9a\u727a\u7272\u54ea\u4e2a\u4f1a\u8bdd\uff0c\u800c\u662f\u7531Oracle\u968f\u673a\u51b3\u5b9a\u3002<br \/>\n\u4e0d\u8fc7\u5bf9\u4e8eRAC\u73af\u5883\u800c\u8a00\uff0c\u6b7b\u9501\u7684\u68c0\u67e5\u4e0d\u5728\u662f\u5185\u90e8\u7684\u968f\u673a\u5b9e\u73b0\uff0cOracle\u901a\u8fc7\u9690\u542b\u53c2\u6570_lm_dd_interval\u6765\u63a7\u5236\u6b7b\u9501\u7684\u68c0\u6d4b\u65f6\u95f4\u3002\u66f4\u91cd\u8981\u7684\u662f\uff0c\u5bf9\u4e8eRAC\u73af\u5883\u800c\u8a00\uff0cOracle\u5141\u8bb8\u4e0d\u540c\u5b9e\u4f8b\u8bbe\u7f6e\u4e0d\u540c\u7684\u503c\u3002\u800c\u4e0d\u540c\u5b9e\u4f8b\u7684\u68c0\u6d4b\u6b7b\u9501\u95f4\u9694\u4e0d\u540c\uff0c\u5c31\u610f\u5473\u7740\u4f18\u5148\u7ea7\u7684\u51fa\u73b0\u3002<br \/>\n\u5982\u679c\u5b9e\u4f8b1\u4e0a\u8bbe\u7f6e\u8be5\u503c\u4e3a\u9ed8\u8ba4\u503c60\u79d2\uff0c\u800c\u5b9e\u4f8b2\u8bbe\u7f6e\u4e3a30\u79d2\uff0c\u90a3\u4e48\u5f53\u53d1\u751f\u6b7b\u9501\u540e\uff0c\u6c38\u8fdc\u662f\u5b9e\u4f8b2\u4e0a\u5148\u68c0\u6d4b\u5230\u6b7b\u9501\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b9e\u4f8b2\u4e0a\u4f1a\u8bdd\u4f1a\u88ab\u727a\u7272\u6389\u3002<br \/>\n\u8fd9\u662f\u4e24\u4e2a\u5b9e\u4f8b\u4e0a\u8bbe\u7f6e\u8be5\u53c2\u6570\u76f8\u540c\u7684\u60c5\u51b5\uff0c\u4e24\u4e2a\u4f1a\u8bdd\u5206\u522b\u8fde\u63a5\u5230\u4e24\u4e2a\u5b9e\u4f8b\uff0c\u4ea7\u751f\u6b7b\u9501\u3002\u5b9e\u4f8b1\u4e0a\u7684\u4f1a\u8bdd1\uff1a<\/p>\n<pre lang='SQL'>SQL> select name from v$database;\r\nNAME\r\n---------\r\nORCL\r\nSQL> select instance_number, instance_name from v$instance;\r\nINSTANCE_NUMBER INSTANCE_NAME\r\n--------------- ----------------\r\n              1 orcl1\r\nSQL> set sqlp 'I1S1> '\r\nI1S1> show parameter _lm\r\nNAME                                 TYPE                                 VALUE\r\n------------------------------------ ----------- ------------------------------\r\n_lm_dd_interval                      integer                                 30\r\nI1S1> set timing on \r\nI1S1> update t_deadlock set name = 'a1' where id = 1;\r\n1 row updated.\r\nElapsed: 00:00:00.07<\/pre>\n<p>\u5728\u5b9e\u4f8b2\u4e0a\u8fde\u63a5\u4f1a\u8bdd2\uff1a<\/p>\n<pre lang='SQL'>SQL> select name from v$database;\r\nNAME\r\n---------\r\nORCL\r\nSQL> select instance_number, instance_name from v$instance;\r\nINSTANCE_NUMBER INSTANCE_NAME\r\n--------------- ----------------\r\n              2 orcl2\r\nSQL> set sqlp 'I2S2> '\r\nI2S2> show parameter _lm\r\nNAME                                 TYPE                                 VALUE\r\n------------------------------------ ----------- ------------------------------\r\n_lm_dd_interval                      integer                                 30\r\nI2S2> set timing on\r\nI2S2> update t_deadlock set name = 'b2' where id = 2;\r\n1 row updated.\r\nElapsed: 00:00:00.04\r\nI2S2> update t_deadlock set name = 'a2' where id = 1;<\/pre>\n<p>\u4f1a\u8bdd1\u4e0a\u9501\u5b9a\u8bb0\u5f552\uff0c\u4ea7\u751f\u6b7b\u9501\uff1a<\/p>\n<pre lang='SQL'>I1S1> update t_deadlock set name = 'b1' where id = 2;<\/pre>\n<p>\u7b2c\u4e00\u6b21\u662f\u5b9e\u4f8b2\u4e0a\u7684\u4f1a\u8bdd2\u88ab\u727a\u7272\u62a5\u9519\uff1a<\/p>\n<pre lang='SQL'>update t_deadlock set name = 'a2' where id = 1\r\n*\r\nERROR at line 1:\r\nORA-00060: deadlock detected while waiting for resource\r\n\r\nElapsed: 00:00:32.15\r\nI2S2> update t_deadlock set name = 'a2' where id = 1;<\/pre>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u4f1a\u8bdd2\u7b49\u5f8530\u79d2\u540e\u62a5\u9519\uff0c\u6b64\u65f6\u4f1a\u8bdd2\u6267\u884c\u540c\u6837\u7684\u8bed\u53e5\u518d\u6b21\u5f15\u53d1\u6b7b\u9501\uff1a<\/p>\n<pre lang='SQL'>update t_deadlock set name = 'b1' where id = 2\r\n*\r\nERROR at line 1:\r\nORA-00060: deadlock detected while waiting for resource\r\n\r\nElapsed: 00:01:00.39\r\nI1S1> update t_deadlock set name = 'b1' where id = 2;<\/pre>\n<p>\u8fd9\u6b21\u53d8\u6210\u5b9e\u4f8b1\u4e0a\u7684\u4f1a\u8bdd1\u88ab\u727a\u7272\u62a5\u9519\uff0c\u53ef\u4ee5\u770b\u5230\uff0c\u4f1a\u8bdd1\u7ecf\u5386\u4e86\u4e24\u6b21\u6b7b\u9501\u68c0\u6d4b\uff0c\u56e0\u6b64\u6267\u884c\u65f6\u95f4\u4e3a1\u5206\u949f\u3002\u4f1a\u8bdd1\u518d\u6b21\u5f15\u5165\u6b7b\u9501\uff1a<\/p>\n<pre lang='SQL'>update t_deadlock set name = 'a2' where id = 1\r\n*\r\nERROR at line 1:\r\nORA-00060: deadlock detected while waiting for resource\r\n\r\nElapsed: 00:01:01.69\r\nI2S2><\/pre>\n<p>\u88ab\u727a\u7272\u7684\u53c8\u53d8\u6210\u4e86\u4f1a\u8bdd2\u3002<br \/>\n\u4e0a\u9762\u8fd9\u4e2a\u6d4b\u8bd5\u662f\u5728\u4e24\u4e2a\u5b9e\u4f8b\u7684_lm_dd_interval\u53c2\u6570\u8bbe\u7f6e\u76f8\u540c\u7684\u60c5\u51b5\u4e0b\uff0c\u4e0b\u9762\u4fee\u6539\u5b9e\u4f8b2\u4e0a\u7684\u53c2\u6570\u8bbe\u7f6e\u4e3a5\u79d2\uff1a<\/p>\n<pre lang='SQL'>I2S2> alter system set \"_lm_dd_interval\" = 5 scope = spfile sid = 'orcl2';\r\nSystem altered.\r\nElapsed: 00:00:00.09\r\nI2S2> shutdown immediate\r\nDatabase closed.\r\nDatabase dismounted.\r\nORACLE instance shut down.\r\nI2S2> startup\r\nORACLE instance started.\r\nTotal System Global Area 281018368 bytes\r\nFixed Size 2095672 bytes\r\nVariable Size 121636296 bytes\r\nDatabase Buffers 150994944 bytes\r\nRedo Buffers 6291456 bytes\r\nDatabase mounted.\r\nDatabase opened.\r\nI2S2> show parameter _lm\r\nNAME                                 TYPE        VALUE\r\n------------------------------------ ----------- ------------------------------\r\n_lm_dd_interval                      integer     5\r\nI2S2> update t_deadlock set name = 'b2' where id = 2;\r\n1 row updated.\r\nElapsed: 00:00:00.06<\/pre>\n<p>\u5b9e\u4f8b2\u53c2\u6570\u751f\u6548\u540e\u8fde\u63a5\u4f1a\u8bdd\u66f4\u65b0\u8be5\u8868\uff0c\u5b9e\u4f8b1\u4e0a\u7684\u4f1a\u8bdd1\u53d6\u6d88\u4e4b\u524d\u7684\u4fee\u6539\uff0c\u91cd\u65b0\u8fdb\u884c\u66f4\u65b0\uff1a<\/p>\n<pre lang='SQL'>\r\n1 row updated.\r\nElapsed: 00:10:08.98\r\nI1S1> rollback;\r\nRollback complete.\r\nElapsed: 00:00:00.00\r\nI1S1> update t_deadlock set name = 'a1' where id = 1;\r\n1 row updated.\r\nElapsed: 00:00:00.01\r\nI1S1> update t_deadlock set name = 'b1' where id = 2;<\/pre>\n<p>\u4e0b\u9762\u5728\u5b9e\u4f8b2\u4e0a\u7684\u4f1a\u8bdd2\uff0c\u5f15\u5165\u6b7b\u9501\uff1a<\/p>\n<pre lang='SQL'>I2S2> update t_deadlock set name = 'a2' where id = 1;\r\nupdate t_deadlock set name = 'a2' where id = 1\r\n*\r\nERROR at line 1:\r\nORA-00060: deadlock detected while waiting for resource\r\n\r\nElapsed: 00:00:06.07\r\nI2S2> update t_deadlock set name = 'a2' where id = 1;\r\nupdate t_deadlock set name = 'a2' where id = 1\r\n*\r\nERROR at line 1:\r\nORA-00060: deadlock detected while waiting for resource\r\n\r\nElapsed: 00:00:05.95\r\nI2S2> update t_deadlock set name = 'a2' where id = 1;\r\nupdate t_deadlock set name = 'a2' where id = 1\r\n*\r\nERROR at line 1:\r\nORA-00060: deadlock detected while waiting for resource\r\n\r\nElapsed: 00:00:06.63\r\nI2S2> update t_deadlock set name = 'a2' where id = 1;\r\nupdate t_deadlock set name = 'a2' where id = 1\r\n*\r\nERROR at line 1:\r\nORA-00060: deadlock detected while waiting for resource\r\n\r\nElapsed: 00:00:05.89<\/pre>\n<p>\u663e\u7136\u7531\u4e8e\u4e0d\u540c\u5b9e\u4f8b\u7684_lm_dd_interval\u53c2\u6570\u7684\u503c\u8bbe\u7f6e\u4e0d\u540c\uff0c\u73b0\u5728\u6bcf\u6b21\u6b7b\u9501\u90fd\u4f1a\u5728\u8bbe\u7f6e\u503c\u66f4\u5c0f\u7684\u5b9e\u4f8b2\u4e0a\u88ab\u68c0\u6d4b\uff0c\u5b9e\u4f8b2\u4e0a\u7684\u4f1a\u8bdd\u6bcf\u6b21\u90fd\u4f1a\u88ab\u6b7b\u9501\u727a\u7272\u6389\u3002\u5c1d\u8bd5\u8bbe\u7f6e\u4e0d\u540c\u7684\u53c2\u6570\u503c\u5728\u4e0d\u540c\u5b9e\u4f8b\u4e0a\u8bbe\u7f6e\u6b7b\u9501\u68c0\u6d4b\u4f18\u5148\u7ea7\u83b7\u5f97\u6210\u529f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6d4b\u8bd5\u63a7\u5236\u5168\u5c40\u6b7b\u9501\u7684\u9690\u542b\u53c2\u6570_lm_dd_interval\u65f6\uff0c\u7a81\u7136\u60f3\u5230\u8fd9\u4e2a\u95ee\u9898\u3002 RAC\u5168\u5c40\u6b7b\u9501\u68c0\u6d4b\u65f6\u95f4\uff1ahttps:\/\/yangtingkun.net\/?p=955 Oracle\u7684\u6b7b\u9501\u5224\u65ad\u662f\u6ca1\u6709\u4f18\u5148\u7ea7\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5f53\u4e24\u4e2a\u6216\u591a\u4e2a\u4f1a\u8bdd\u53d1\u751f\u6b7b\u9501\u7684\u65f6\u5019\uff0c\u65e0\u6cd5\u6307\u5b9a\u727a\u7272\u54ea\u4e2a\u4f1a\u8bdd\uff0c\u800c\u662f\u7531Oracle\u968f\u673a\u51b3\u5b9a\u3002 \u4e0d\u8fc7\u5bf9\u4e8eRAC\u73af\u5883\u800c\u8a00\uff0c\u6b7b\u9501\u7684\u68c0\u67e5\u4e0d\u5728\u662f\u5185\u90e8\u7684\u968f\u673a\u5b9e\u73b0\uff0cOracle\u901a\u8fc7\u9690\u542b\u53c2\u6570_lm_dd_interval\u6765\u63a7\u5236\u6b7b\u9501\u7684\u68c0\u6d4b\u65f6\u95f4\u3002\u66f4\u91cd\u8981\u7684\u662f\uff0c\u5bf9\u4e8eRAC\u73af\u5883\u800c\u8a00\uff0cOracle\u5141\u8bb8\u4e0d\u540c\u5b9e\u4f8b\u8bbe\u7f6e\u4e0d\u540c\u7684\u503c\u3002\u800c\u4e0d\u540c\u5b9e\u4f8b\u7684\u68c0\u6d4b\u6b7b\u9501\u95f4\u9694\u4e0d\u540c\uff0c\u5c31\u610f\u5473\u7740\u4f18\u5148\u7ea7\u7684\u51fa\u73b0\u3002 \u5982\u679c\u5b9e\u4f8b1\u4e0a\u8bbe\u7f6e\u8be5\u503c\u4e3a\u9ed8\u8ba4\u503c60\u79d2\uff0c\u800c\u5b9e\u4f8b2\u8bbe\u7f6e\u4e3a30\u79d2\uff0c\u90a3\u4e48\u5f53\u53d1\u751f\u6b7b\u9501\u540e\uff0c\u6c38\u8fdc\u662f\u5b9e\u4f8b2\u4e0a\u5148\u68c0\u6d4b\u5230\u6b7b\u9501\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5b9e\u4f8b2\u4e0a\u4f1a\u8bdd\u4f1a\u88ab\u727a\u7272\u6389\u3002 \u8fd9\u662f\u4e24\u4e2a\u5b9e\u4f8b\u4e0a\u8bbe\u7f6e\u8be5\u53c2\u6570\u76f8\u540c\u7684\u60c5\u51b5\uff0c\u4e24\u4e2a\u4f1a\u8bdd\u5206\u522b\u8fde\u63a5\u5230\u4e24\u4e2a\u5b9e\u4f8b\uff0c\u4ea7\u751f\u6b7b\u9501\u3002\u5b9e\u4f8b1\u4e0a\u7684\u4f1a\u8bdd1\uff1a SQL> select name from v$database; NAME &#8212;&#8212;&#8212; ORCL SQL> select instance_number, instance_name from v$instance; INSTANCE_NUMBER INSTANCE_NAME &#8212;&#8212;&#8212;&#8212;&#8212; &#8212;&#8212;&#8212;&#8212;&#8212;- 1 orcl1 SQL> set sqlp &#8216;I1S1> &#8216; I1S1> show parameter _lm NAME TYPE VALUE &#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212; &#8212;&#8212;&#8212;&#8211; &hellip; <a href=\"https:\/\/yangtingkun.net\/?p=957\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[824,221,180,823],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p2yiY3-fr","_links":{"self":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts\/957"}],"collection":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=957"}],"version-history":[{"count":1,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts\/957\/revisions"}],"predecessor-version":[{"id":958,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=\/wp\/v2\/posts\/957\/revisions\/958"}],"wp:attachment":[{"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=957"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=957"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yangtingkun.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=957"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}