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  ORA-00824: can not set sga_target due to existing problem-solving
     
  Add Date : 2018-11-21      
         
         
         
  Said that after using Oracle9i client connections Oracle10g, modify some parameters, resulting in Oracle10 not start normally, small machine will not restart several times.

After the remote connection, the user when using Oracle sqlplus following startup, the system prompts as follows:

ORA-00824: can not set sga_target due to existing internal settings, see alert log for more information

It appears to be sga_target this parameter in question. Check in online information search sga_target parameters (specific I can see another one reprint article: ORACLE10 - SGA_MAX_SIZE and SGA_TARGET), it is learned that in oracle10 new memory parameters for each component of the dynamic adjustment of SGA memory . Its content is also stored in the spfile.

Prior to this, after another piece of paper ORACLE9i-- optimization SGA exceeds the maximum result 1.7G instance can not be started by the relationship between spfile and pfile to solve the problem can not be started due to the adjustment SGA_MAX_SIZE instance, the use of this same relationship sga_target can solve today's problems.

Moreover, after practice I found that the process used last too cumbersome, today through practice to find an easy way.

But the idea is the same: to find ways to modify the value of sga_target to the normal threshold, and then start the database instance

According to this idea:

1, we can start the first instance with the database of configuration parameters pfile

2, through reconstruction pfile spfile file (create spfile from pfile)

3, close the database instance

4, the normal start the database instance

Specific operations are as follows:

[Oracle @ RedHat pfile] $ sqlplus / nolog

SQL * Plus: Release 10.2.0.1.0 - Production on Tue Oct 20 00:20:19 2009

Copyright (c) 1982, 2005, Oracle. All rights reserved.

SQL> conn / as sysdba
Connected to an idle instance.
SQL> startup pfile = '/ home / oracle / admin / zgz / pfile / init.ora.82220096537'

- "Start oracle instance via pfile file"
ORACLE instance started.

Total System Global Area 285212672 bytes
Fixed Size 1218968 bytes
Variable Size 88082024 bytes
Database Buffers 188743680 bytes
Redo Buffers 7168000 bytes
Database mounted.
Database opened.
SQL> create spfile from pfile = '/ home / oracle / admin / zgz / pfile / init.ora.82220096537'; - "by rebuilding the spfile pfile"

File created.

SQL> shutdown immediate - "Shut down the database instance."
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup - "through the normal startup spfile file oracle instance"
ORACLE instance started.

Total System Global Area 285212672 bytes
Fixed Size 1218968 bytes
Variable Size 88082024 bytes
Database Buffers 188743680 bytes
Redo Buffers 7168000 bytes
Database mounted.
Database opened.
SQL>

Look! It is not very easy to approach than the last and up entirely on the command line can be completed.

Such learning is also a problem, you want to keep abreast easier way, is progress!

However, in the specific resolution process, when I use shutdown immediate to close the database, the system suddenly reported the following error: ORA-03113: end-of-file on communication channel

Not previously encountered in the online search found, the cause of this error for many reasons, most of which are caused by a bad network connection, turn off the results of my current SSH window to re-establish a SSH connection, the problem is solved.
     
         
         
         
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