上午orcale操作中，计算机突然卡死，无解，只能关机，下午连接数据库时就连不上了，报错：
ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
进程 ID: 0
会话 ID: 0 序列号: 0
网上查了方法，通过几篇文章一起共同解决此问题：
1.在cmd中输入sqlplus /nolog
2.正常进入sql 〉编辑状态下，输入connect sys/tiger as sysdba 此时又爆出错误，
ERROR:
ORA-28056: Writing audit records to Windows Event Log failed
OSD-1627319533: Message 1627319533 not found; product=RDBMS; facility=SOSD
O/S-Error: (OS 1502) ??????????????????
ORA-28056: Writing audit records to Windows Event Log failed
OSD-1627319533: Message 1627319533 not found; product=RDBMS; facility=SOSD
O/S-Error: (OS 1502) ??????????????????
ORA-28056: Writing audit records to Windows Event Log failed
OSD-1627319533: Message 1627319533 not found; product=RDBMS; facility=SOSD
O/S-Error: (OS 1502) ??????????????????
ORA-28056: Writing audit records to Windows Event Log failed
OSD-1627319533: Message 1627319533 not found; product=RDBMS; facility=SOSD
O/S-Error: (OS 1502) ??????????????????
这个解决过程：
打开windows 事件查看器，将应用程序日志清理一下，重新连接数据库，连接成功。启动数据库，启动正常。
http://wenku.baidu.com/view/d402f8da7f1922791688e818.html 事件查看器
http://wenku.baidu.com/view/d402f8da7f1922791688e818.html 事件查看器
3.走下边的流程
sqlplus "sys/password as sysdba"