请问从下面的数据库的宕机现象信息，怎么找出数据库宕机原因呀？
操作系统日志事件详细信息：
日期: 2012-9-15
来源: Oracle.prd
时间: 16:41:42
类别: 无
类型: 错误
事件ID:
用户: N/A
计算机：SERVER2
描述: Unable to begin another thread.
ALERT.LOG显示下面几条信息：
Sat Sep 15 16:41:30 2012
skgpspawn failed:category = 27143, depinfo = 9261, op = spdcr, loc = skgpspawn
skgpspawn failed:category = 27143, depinfo = 9261, op = spdcr, loc = skgpspawn
Sat Sep 15 16:41:42 2012
skgpspawn failed:category = 27143, depinfo = 9261, op = spdcr, loc = skgpspawn
skgpspawn failed:category = 27143, depinfo = 9261, op = spdcr, loc = skgpspawn
Sat Sep 15 17:11:38 2012
skgpspawn failed:category = 27143, depinfo = 9261, op = spdcr, loc = skgpspawn
ORACLE是专用服务器模式
以SYS用户SQLPLUS登录报 ORA-12500: TNS:监听器未能启动专用的服务器进程
listener.log的有很多这样的错误信息：
15-9月 -2012 17:50:50 * (CONNECT_DATA=(SERVICE_NAME=prd)(CID=(PROGRAM=c:\forte\install\bin\ftexec.exe)(HOST=FORTE)(USER=SYSTEM))) * (ADDRESS=(PROTOCOL=tcp)(HOST=202.96.*.*)(PORT=4526)) * establish * prd * 12500
TNS-12500: TNS：监听器未能启动专用的服务器进程
TNS-12560: TNS: 协议适配器错误
TNS-00530: 协议适配器错误
32-bit Windows Error: 233: Unknown error
操作系统: Microsoft Windows Server 2003 R2 Enterprise x64 Edition Service Pack 2
CPU: Intel(R) Xeon(R) CPU E7430 @ 2.13GHz 2.13GHz
内存: 16G
Oracle9i版本: 9.2.0.8
