CA ERwin Model Manager Implementation Guide

Database Configurationrem Generate Deletion scriptSELECT 'ALTER DATABASE DROP LOGFILE GROUP ' || TO_CHAR ( GROUP# ) || ' ;' from V$LOGwhere BYTES < 2097152.Spool &1.DropLog.ORA/Spool OffCOMMIT ;@&1.AddLog.ORA$Del &1.AddLog.ORACOMMIT ;@&1.SwtchLog.ORA$Del &1.SwtchLog.ORACOMMIT ;@&1.DropLog.ORA$Del &1.DropLog.ORACOMMIT ;2. Run the following query to verify the new Redo log configuration:SQLWKS> select group#, status, bytes from v$log;Note: Oracle does not let you drop an older Redo log file that is still ACTIVE. Ifyou must drop an older Redo log file that is still ACTIVE, drop that log filemanually.Redo Log BufferThe Redo log buffer is an area in memory that Oracle uses to collect DMLsbefore they are written to the Redo log files. The log file write occurs wheneither a transaction commits or a Redo log buffer is full. Because CA ERwin MMtends to generate fairly large transactions, use a log buffer size of 163840bytes. (For single disk Oracle installations, use a log buffer size of 655360bytes.) Setting the Redo log buffer size to a value smaller than therecommended value can degrade I/O performance. Using a larger valuerequires more memory.The Redo log buffer size is defined using the LOG_BUFFER parameter in theINIT.ora or INIT.ora file.62 Implementation Guide