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Yi's Oracle DBA blog: Using Rman to Migrate database from windows(11.2.0.1) to linux(11.2.0.3)
1 Verify following information on Winodow platform: SQL> select * from v$version; SQL> select platform_id, platform_name from v$database...
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Yi's Oracle DBA blog: July 2013
1, On Primary database run preupgrade check: SQL>@/u01/app/oracle/product/11.2.0.3/db_1/rdbms/admin/utlu112i.sql; 2, On Standby database, copy following file from 11.2.0.2 home to 11.2.0.3 home on al...
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Yi's Oracle DBA blog: 12C: Convert non-cdb into pdb and plug into cdb
1. After upgarde from 11.2.0.3 to 12.1.0.1, database(TESTRAC) is NON-CDB: SQL> show parameter db_name; NAME ...
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Yi's Oracle DBA blog: Use DBMS_STATS.FLUSH_DATABASE_MONITORING_INFO to flush monitoring data
Problem description: Oracle automatic stats collection job did not collect stats on a high modified table Cause: The monitoring data d...
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Yi's Oracle DBA blog: High 'direct path read' waits in 11g
Symptoms: See high 'direct path read' wait when query a large table. cause: In 10g, serial table scans for "large" tables used to go thr...
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Yi's Oracle DBA blog: April 2013
Symptoms: See high 'direct path read' wait when query a large table. cause: In 10g, serial table scans for "large" tables used to go through cache (by default) which is not the case anymore. In 11...