ORA-00845 Oracle 启不来修改 MEMORY_TARGET

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.
 
Connected to an idle instance.
 
SQL> startup pfile=/app/oracle/admin/orcl/pfile/init.ora.103201271612 
ORA-00845: MEMORY_TARGET not supported on this system 
SQL> shutdown abort      
ORACLE instance shut down. 
SQL> startup pfile=/app/oracle/admin/orcl/pfile/init.ora.103201271612 force 
ORA-00845: MEMORY_TARGET not supported on this system 
SQL> exit 
Disconnected
 
#---------解决：扩展内存
 
#--------pfile位置：$ORACLE_BASE/admin/[$ORACLE_SID]/pfile/init.ora.*

2.扩展内存后，按pfile启动，但sfile修改不了
 
SQL*Plus: Release 11.2.0.1.0 Production on Sun Nov 4 16:00:25 2012
 
Copyright (c) 1982, 2009, Oracle.  All rights reserved.
 
Connected to an idle instance.
 
SQL> startup pfile=/app/oracle/admin/orcl/pfile/init.ora.103201271612 force 
ORACLE instance started.
 
#----------按ORACLE PFILE 启动
 
Total System Global Area 1219260416 bytes 
Fixed Size                  2212856 bytes 
Variable Size            738200584 bytes 
Database Buffers          469762048 bytes 
Redo Buffers                9084928 bytes 
Database mounted. 
Database opened. 
SQL> alter system set memory_max_target=1258200M scope=both; 
alter system set memory_max_target=1258200M scope=both 
                * 
ERROR at line 1: 
ORA-02095: specified initialization parameter cannot be modified

SQL> alter system set memory_max_target=1258200M scope=spfile; 
alter system set memory_max_target=1258200M scope=spfile 
* 
ERROR at line 1: 
ORA-32001: write to SPFILE requested but no SPFILE is in use//spfile文件可能不存在
 
#-------------/app/oracle/product/11.2.0/dbhome_2/dbs/----------------存放spfile

3.临时建立SPFILE
 
[Oracle@h1 dbs]$ ls 
hc_orcl.dat  init.ora  lkORCL  orapworcl
 
 
 
SQL> shutdown immediate; 
Database closed. 
Database dismounted. 
ORACLE instance shut down
 
SQL> startup nomount 
ORA-01078: failure in processing system parameters 
LRM-00109: could not open parameter file '/app/oracle/product/11.2.0/dbhome_2/dbs/initorcl.ora'
 
#------------------------------spfile不存在
 
#-----------------------------spfile位置：$ORACLE_HOME/dbs/init[ORACLE_SID].ora
 
#-----------------------------名字格式为:initORACLE_SID.ora
 
[oracle@h1 dbhome_2]$ cd /app/oracle/admin/orcl/pfile/ 
[oracle@h1 pfile]$ ls 
init.ora.103201271612
 
 
 
[oracle@h1 pfile]$echo $ORACLE_SID
 
orcl
 
#-------------------查看环境变量$ORACLE_SID
 
[oracle@h1 pfile]$ cp init.ora.103201271612 /app/oracle/product/11.2.0/dbhome_2/dbs
 
[oracle@h1 pfile]$ cd /app/oracle/product/11.2.0/dbhome_2/dbs
 
[oracle@h1 dbs]$ mv init.ora.103201271612  initorcl.ora
 
#------------------------------更改名字格式为:initORACLE_SID.ora
 
 
 
4.mount数据库
 
 
 
[oracle@h1 dbs]$ sqlplus "/as SYSDBA"
 
SQL*Plus: Release 11.2.0.1.0 Production on Sun Nov 4 16:59:09 2012
 
Copyright (c) 1982, 2009, Oracle.  All rights reserved.
 
Connected to an idle instance.
 
SQL> startup mount 
ORACLE instance started.
 
Total System Global Area 1219260416 bytes 
Fixed Size                  2212856 bytes 
Variable Size            738200584 bytes 
Database Buffers          469762048 bytes 
Redo Buffers                9084928 bytes 
Database mounted. 
SQL>

SQL> show parameter memory_target;
 
NAME                                TYPE        VALUE 
------------------------------------ ----------- ------------------------------ 
memory_target                        big integer 1168M 
SQL> show parameter memory_max_target;
 
NAME                                TYPE        VALUE 
------------------------------------ ----------- ------------------------------ 
memory_max_target                    big integer 1168M 
SQL>        
SQL>  alter system set memory_max_target=1G scope=spfile; 
alter system set memory_max_target=1G scope=spfile 
* 
ERROR at line 1: 
ORA-32001: write to SPFILE requested but no SPFILE is in use

SQL> show parameter spfile;
 
NAME                                TYPE        VALUE 
------------------------------------ ----------- ------------------------------ 
spfile                              string
 
#------------------重建spfile 
SQL> create spfile from pfile;
 
File created.

SQL> shutdown immediate; 
Database closed. 
Database dismounted. 
ORACLE instance shut down. 
SQL>  startup 
ORACLE instance started.
 
Total System Global Area 1219260416 bytes 
Fixed Size                  2212856 bytes 
Variable Size            738200584 bytes 
Database Buffers          469762048 bytes 
Redo Buffers                9084928 bytes 
Database mounted. 
Database opened. 
SQL> show parameter spfile;
 
NAME                                TYPE        VALUE 
------------------------------------ ----------- ------------------------------ 
spfile                              string      /app/oracle/product/11.2.0/dbh 
                                                ome_2/dbs/spfileorcl.ora
 
 
 
SQL> alter system set memory_max_target=1G scope=spfile;
 
System altered.
 
 
 
SQL> alter system set memory_target=1G scope=both;
 
System altered.
 
 
 
SQL> alter system set memory_max_target=1332M scope=both; 
alter system set memory_max_target=1332M scope=both 
                * 
ERROR at line 1: 
ORA-02095: specified initialization parameter cannot be modified
 
 
 
SQL> alter system set memory_max_target=1332M scope=spfile;
 
 
 
System altered.
 
-------------------------------
 
SQL> shutdown immediate 
Database closed. 
Database dismounted. 
ORACLE instance shut down. 
SQL> startup 
ORACLE instance started.
 
Total System Global Area 1402982400 bytes 
Fixed Size                  2213296 bytes 
Variable Size            922749520 bytes 
Database Buffers          469762048 bytes 
Redo Buffers                8257536 bytes 
Database mounted. 
Database opened. 
SQL> show parameter memory_max_target;
 
NAME                                TYPE        VALUE 
------------------------------------ ----------- ------------------------------ 
memory_max_target                    big integer 1344M

SQL> show parameter memory_target;
 
NAME                                TYPE        VALUE 
------------------------------------ ----------- ------------------------------ 
memory_target                        big integer 1G 
SQL>

-----------------------finish