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