drop rollback segment "RB16";
alter rollback segment "RB3" offline;
alter rollback segment "RB1" online;
create rollback segment "RB6" tablespace "ROLLBACK_DATA" storage (initial 1m next 1m);

alter rollback segment "RB16" offline;

drop rollback segment "RB14";
drop rollback segment "RB6";
alter database add logfile c:\orant\database\log1.ora size 10m;
drop rollback segment "RB3";
GLOBAL_NAME=FALSE
alter rollback segment "RB6" online;

drop rollback segment "RB5";
alter database add logfile c:\orant\database\log2.ora size 10m;
alter rollback segment "RB4" online;
create rollback segment "RB2" tablespace "ROLLBACK_DATA" storage (initial 1m next 1m);

alter rollback segment "RB9" offline;
SGA=db_block_buffers*db_block_size+share_pool_size+log_buffers+sort_arer_size+1m

alter database drop logfile c:\orant\database\log3orcl.ora;
=1/3--1/2
alter rollback segment "RB4" offline;

alter rollback segment "RB8" offline;
drop rollback segment "RB15";
alter database drop logfile c:\orant\database\log2orcl.ora;

alter rollback segment "RB3" online;
alter rollback segment "RB2" online;
create rollback segment "RB5" tablespace "ROLLBACK_DATA" storage (initial 1m next 1m);

添加：
alter rollback segment "RB5" online;
正在看的ORACLE教程是:oracle初始化参数设置。 ALTER DATABASE DATAFILEd:\ORANT\DATABASE\USER1ORCL.ORA RESIZE 1000M;

alter rollback segment "RB1" offline;
alter database add logfile c:\orant\database\log4.ora size 10m;

DB_BLOCK_BUFFERS=16000（db_block_size=2k）
drop rollback segment "RB8";
ALTER DATABASE DATAFILEd:\ORANT\DASTABASE\TMP1ORCL.ORA RESIZE 300M;

DML_LOCKS=1000
alter rollback segment "RB12" offline;
alter rollback segment "RB7" offline;
alter rollback segment "RB5" offline;
alter rollback segment "RB2" offline;
SHARE_POOL_SIZE=30720000(服务器要增大10倍)
以128M为例：

drop rollback segment "RB12";
create rollback segment "RB3" tablespace "ROLLBACK_DATA" storage (initial 1m next 1m);
alter rollback segment "RB10" offline;
alter rollback segment "RB6" offline;
LOG_BUFFERS=655360
drop rollback segment "RB2";
ROLLBACK_SEGEMENTS=(RB1,RB2)//一般大型数据库要建立6－8个回滚段

alter database drop logfile c:\orant\database\log4orcl.ora;

drop rollback segment "RB10";
alter database add logfile c:\orant\database\log3.ora size 10m;
OPEN_CURSORS=200
alter rollback segment "RB14" offline;
CREATE TABLESPACE INDEX_DATA DATAFILEd:\ORANT\DATABASE\INDEX_DATA SIZE 500M;
alter rollback segment "RB11" offline;
SORT_AREA_SIZE=327680(服务器要增大100倍)－－－－－－－－－－添加
drop rollback segment "RB11";

drop rollback segment "RB1";
create rollback segment "RB4" tablespace "ROLLBACK_DATA" storage (initial 1m next 1m);
create rollback segment "RB1" tablespace "ROLLBACK_DATA" storage (initial 1m next 1m);
drop rollback segment "RB9";
drop rollback segment "RB7";
ALTER DATABASE DATAFILEd:\ORANT\DATABASE\RBS1ORCL.ORA RESIZE 300M;
drop rollback segment "RB4";
INITORAL.ORA配置：
alter rollback segment "RB13" offline;
alter rollback segment "RB15" offline;
drop rollback segment "RB13";
alter database drop logfile c:\orant\database\log1orcl.ora;