Oracle 修改 MEMORY_TARGET，内存减小导致ORACLE启动不了，扩展内存后，按pfile启动，但sfile修改不了。

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