在一数据库版本为(标准版)Oracle Database 10g Release 10.2.0.4.0 - 64bit Production 的服务器上调整 sga_target时,遇到命令执行了非常久都没有执行完成的异常情况,觉得非常诧异、不解,因为一般调整sga_targt命令非常快速,检查了告警日志,并没有任何异常错误,等了好几分钟都没有执行完成,于是执行了CTRL+C命令结束了SQL命令,具体过程如下:

$ sqlplus / as sysdba
 
SQL*Plus: Release 10.2.0.4.0 - Production on Sat Sep 3 22:35:59 2016
 
Copyright (c) 1982, 2007, Oracle.  All Rights Reserved.
 
 
Connected to:
Oracle Database 10g Release 10.2.0.4.0 - 64bit Production
 
SQL> show parameter sga
 
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
lock_sga                             boolean     FALSE
pre_page_sga                         boolean     FALSE
sga_max_size                         big integer 8G
sga_target                           big integer 6G
 
SQL> 
SQL> alter system set sga_target=8g scope=both;
 
^Calter system set sga_target=8g scope=both
*
ERROR at line 1:
ORA-02097: parameter cannot be modified because specified value is invalid
ORA-01013: user requested cancel of current operation
 
 
 
SQL> 
SQL> 

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