DB2 9 vs Oracle 10g Admin. Technology - IBM

DB2 Information ManagementINIT.ora 와 DB2 파라미터• DB2는 50개 이상의 변수가 변경 즉시 반영됨 !Oracle 10ginit.ora parmcontrol_filesdb_nk_cache_sizedb_block_buffersdb_block_checkingdb_block_checksumdb_create_online_log_dest_ndb_block_sizedb_filesdb_keep_cache_sizedb_recycle_cache_sizedb_namedb_writer_processesDB2 9 Equivalentno equivalent parm neededno equivalent parm neededno equivalent parm neededsee: buffpageno equivalent parm neededno equivalent parm needednewlogpathnpagesizemaxtotfilopno equivalent parm neededno equivalent parm neededno equivalent parm needednum_iocleanersCommentsSQLBP.1, SQLSPCS.1, SQLOG*, SQLDBCON, db2rhist.asc. Multiplefiles in DB2 perform this functionality.Create as many buffer pools as you want of any page sizeSame as above. If no buffer pools are created then use buffpage db cfgparm.DB2 uses consistency bits to maintain page level integrity. Thisperforms better then checksum page checking. Cannot be turned off.Same as above.Specifies where to change the log files location. db cfg parm.Defined when database is created.Maximum open files. dbm cfg parm.To have data pages kept in memory, create a buffer pool specifically fortables you want to pin.DB2's buffer pool algorithm is more advanced (not just LRU) so youdon't need to specify recycle pools.With DB2 the database name is defined with create database commandand not by a config parm. You can see the name (and provide aliasesfor that name) with the db2 catalog command and/or the db2 listdatabase directory command.Number of asynchronous page cleaners. db cfg parm.DB2 9 vs Oracle 10g© 2008 IBM Corporation 28