發現問題
我使用的Oracle11g，當我敲下如下一段命令後，就讓我傻眼了。。
alter system set sga_max_size=960M scope=spfile; shutdown immediate startup
此時的startup報錯了，錯誤為：
SQL> startup ORA-00844: Parameter not taking MEMORY_TARGET into account ORA-00851: SGA_MAX_SIZE 985661440 cannot be set to more than MEMORY_TARGET 784334848.
原因分析
原來在Oracle11g中增加了memory_target參數，sga_max_size必須比memory_target參數小。那麼問題來了，此時我已經關閉Oracle了，spfile文件是二進制文件，又不能手動修改，那麼我該怎麼辦呢。。好捉急好捉急。。。
解決思路
通過pfile啟動Oracle–>在Oracle中通過create pfile='' from spfile=''取出spfile的內容（pfile是可以手動修改的）–>修改新建的pfile–>以新的pfile啟動Oracle–>在Oracle中通過create spfile='' from pfile=''獲得修改後的spfile
實戰
[oracle@wing ~]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on Mon Feb 15 14:04:46 2016 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to an idle instance. SQL> create pfile='/home/oracle/pfile.new' from spfile='/u01/app/oracle/product/11.2.0/db_1/dbs/spfilewingdb.ora'; File created. SQL> exit Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options 通過vi修改pfile.new文件中相應的參數（本文檔中是memory_target參數），修改後保存 [oracle@wing ~]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on Mon Feb 15 14:04:46 2016 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to an idle instance. SQL> startup pfile='/home/oracle/pfile.new' ORACLE instance started. Total System Global Area 810090496 bytes Fixed Size 2257520 bytes Variable Size 415239568 bytes Database Buffers 390070272 bytes Redo Buffers 2523136 bytes Database mounted. Database opened. SQL> create spfile='/u01/app/oracle/product/11.2.0/db_1/dbsspfilewingdb.ora' from pfile='/home/oracle/pfile.new'; File created. SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down. SQL> exit Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options [oracle@wing ~]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on Mon Feb 15 14:08:40 2016 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to an idle instance. SQL> SQL> startup ORACLE instance started. Total System Global Area 810090496 bytes Fixed Size 2257520 bytes Variable Size 415239568 bytes Database Buffers 390070272 bytes Redo Buffers 2523136 bytes Database mounted. Database opened. SQL> show parameter memory NAME TYPE ------------------------------------ -------------------------------- VALUE ------------------------------ hi_shared_memory_address integer 0 memory_max_target big integer 800M memory_target big integer 800M shared_memory_address integer 0 SQL> show parameter sga NAME TYPE ------------------------------------ -------------------------------- VALUE ------------------------------ lock_sga boolean FALSE pre_page_sga boolean FALSE sga_max_size big integer 776M sga_target big integer 740M # 至此Oracle使用新的spfile啟動成功，參數也得到相應的修改
總結
以上就是關於如何在Oracle關閉的情況下修改spfile裡面參數的全部內容了，希望本文的內容對大家的學習或者工作能帶來一定的幫助，如果有疑問大家可以留言交流。
