今天想测试点东西，登录测试库；发现实例是关闭的；
SQL> startup
ORACLE instance started.
Total System Global Area 2722467840 bytes
Fixed Size 2231472 bytes
Variable Size 1476395856 bytes
Database Buffers 1241513984 bytes
Redo Buffers 2326528 bytes
Database mounted.
ORA-03113: end-of-file on communication channel
Process ID: 23281
Session ID: 1 Serial number: 5
查看日志
SUCCESS: diskgroup ORAARCH was mounted
ARCH: Error 19504 Creating archive log file to ‘+ORAARCH‘
Errors in file /u01/app/oracle/diag/rdbms/xhdb/xhdb1/trace/xhdb1_ora_23565.trc:
ORA-16038: log 5 sequence# 345 cannot be archived
ORA-19504: failed to create file ""
ORA-00312: online log 5 thread 1: ‘+ORADATA/xhdb/onlinelog/group_5.272.857422319 ‘
USER (ospid: 23565): terminating the instance due to error 16038
System state dump requested by (instance=1, osid=23565), summary=[abnormal insta nce termination].
System State dumped to trace file /u01/app/oracle/diag/rdbms/xhdb/xhdb1/trace/xh db1_diag_23451.trc
Dumping diagnostic data in directory=[cdmp_20141218102056], requested by (instan ce=1, osid=23565), summary=[abnormal instance termination].
Instance terminated by USER, pid = 23565
查看(fdisk)查看磁盘都在；切换到grid集群也在运行，asm磁盘组都在；可能是归档空间不够了；把节点1的数据库实例启动到挂载状态下；
SQL> startup mount;
ORACLE instance started.
Total System Global Area 2722467840 bytes
Fixed Size 2231472 bytes
Variable Size 1476395856 bytes
Database Buffers 1241513984 bytes
Redo Buffers 2326528 bytes
Database mounted.
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination +ORAARCH
Oldest online log sequence 345
Next log sequence to archive 345
SQL> select group_number,name,state,total_mb,free_mb from v$asm_diskgroup;
GROUP_NUMBER NAME STATE TOTAL_MB FREE_MB
------------ ------------------------------ ----------- ---------- ----------
1 CRS MOUNTED 998 600
2 ORAARCH MOUNTED 8189 11
3 ORADATA CONNECTED 20473 16198
发现是oraarch 归档空间不够了,节点1登录rman,把归档日志删除；在节点1和节点2启动数据库实例，正常；
RMAN> crosscheck archivelog all;
RMAN> delete archivelog all;
SQL> select group_number,name,state,total_mb,free_mb from v$asm_diskgroup;
GROUP_NUMBER NAME STATE TOTAL_MB FREE_MB
------------ ------------------------------ ----------- ---------- ----------
1 CRS MOUNTED 998 600
2 ORAARCH CONNECTED 8189 5123
3 ORADATA CONNECTED 20473 16198
SQL> alter database open;
Database altered.
节点2 也能正常打开
[oracle@rac2 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Thu Dec 18 10:56:54 2014
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 2722467840 bytes
Fixed Size 2231472 bytes
Variable Size 1191183184 bytes
Database Buffers 1526726656 bytes
Redo Buffers 2326528 bytes
Database mounted.
Database opened.
原文地址：http://summervast.blog.51cto.com/690507/1591294
