启动Oracle 11gR2后报错:ORA-00845 rac1:/home/oracle> sqlplus / as sysdba; SQL*Plus: Release 11.2.0.3.0 Production onTue Feb 14 09:11:41 2012 Copyright (c) 1982, 2011, Oracle.  All rights reserved. Connected to an idle instance. SQL> startup ORA-00845: MEM…

练习时执行一条修改数据库连接数的语句: alter system set processes=1 scope=spfile; 然后关闭数据库: shutdown 再启动数据库时,出现异常,报错信息如下: 报错的意思是说:参数文件(spfile)中的db_block_buffers参数设置的与SGA_TARGET或MEMORY_TARGET有冲突 错误分析:参数文件中的参数值设置的有问题 尝试解决: (1)通过启动数据库并且指定pfile方式启动,即:startup pfile='E:\app\z…

cd $ORACLE_HOME cd dbs cat init.ora cat spfilematedata.ora 查看MEMORY_TARGET设置的大小 修改系统,设置shm的大小大于MEMORY_TARGET设置 mount -o size=16G -o nr_inodes=1000000 -o noatime,nodiratime -o remount /dev/shm 永久化 写入到fstab中: vi /etc/fstab 增加如下: shm /dev/shm tmpfs size…

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Enabling Automatic Memory Management alter system set memory_max_target=50G scope=spfile; alter system set memory_target=50G scope=spfile; alter system set sga_max_size=50G  scope=spfile; alter system set pga_aggregate_target=0 scope=spfile; alter sy…

1.内存减小导致Oracle启动不了   Last login: Sun Nov  4 15:09:06 2012 from 192.168.5.222  [oracle@h1 ~]$ sqlplus "/as SYSDBA"   SQL*Plus: Release 11.2.0.1.0 Production on Sun Nov 4 15:26:59 2012   Copyright (c) 1982, 2009, Oracle.  All rights reserved.   Co…

16.Setting which of the following initialization parameters enables Automatic Memory Management? A. MEMORYJARGET B. MEMORY_MAX_TARGET C. SGATARGET D. PGA AGGREGATE TARGET Answer: A [解析] 11g中新增MEMORY_MAX_TARGET參数,此參数一出现就如在10g中第一次出现SGA_MAX_SIZE參数一样给人以耳…

1. 测试环境OS: RHEL5U5(32bit)DB: Oracle 11.2.0.3.0(32bit) 2.   异常原因. 2.1 oracle 11g默认sga_target为0,如下图, Oracle 10g开始,引入SGA_TARGET初始化参数, 让oracle自动管理SGA中(Buffer cache (DB_CACHE_SIZE),Shared pool (SHARED_POOL_SIZE),Large pool (LARGE_POOL_SIZE),Java pool (JAV…

关于SGA与memory_target 大小冲突照成数据库无法挂载问题   错误信息: ORA-00844: Parameter not taking MEMORY_TARGET into account ORA-00851: SGA_MAX_SIZE xxx cannot be set to more than MEMORY_TARGET xxx.  1.      简介 Oracle 11g中,ORACLE把SGA与PGA统一管理,总和为memory_target参数的设定,也就是MAX(S…

环境: windows server datacenter 4G,4x2=8处理器 oracle 11g 错误如下 ORA-: Specified value of MEMORY_TARGET is too small, needs to be at least 936M 创建文件 create pfile='$ORACLE_HOME/dbs/spfileorcl_bak.ora' from spfile; 该文件的内容如下: orcl.__db_cache_size=1543503872 or…