oracle startup没有任何反应

现象

[oracle@focorcl-ogg01 database]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Thu Jul 7 23:51:15 2016

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup;

语句运行几分钟没有任何反应，alert_orcl.log中没有任何信息。

原因

*.log_archive_dest_1='location=/backup/redo/archive/'
*.log_archive_format='ARCH_%t_%s_%r.ARC'
*.memory_max_target=20480G
*.memory_target=20480G

[oracle@focorcl-ogg01 trace]$ cat /proc/meminfo 
MemTotal:       49385184 kB
MemFree:        39167292 kB

系统内存为48G，结果oracle内存设置了20480G.

解决

[oracle@focorcl-ogg01 trace]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Thu Jul 7 23:59:37 2016

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> create pfile='/u01/init.ora' from spfile;

File created.

[oracle@focorcl-ogg01 trace]$ vi /u01/init.ora 
--修改
*.memory_max_target=20G
*.memory_target=20G

[oracle@focorcl-ogg01 trace]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Fri Jul 8 00:01:29 2016

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> create spfile from pfile='/u01/init.ora';

File created.

SQL> startup;
ORACLE instance started.

Total System Global Area 2.1379E+10 bytes
Fixed Size          2262656 bytes
Variable Size        1.2885E+10 bytes
Database Buffers     8455716864 bytes
Redo Buffers           36073472 bytes
Database mounted.
Database opened.

问题解决。