[ask Maclean] sqlnet.log错误日志,能否根据错误日志来确定是network timeout或者是oracle timeout?

大部分中间件服务器瞬间连不上大部分核心数据库，以下是其中一台db的报错日志：
Fatal NI connect error 12170.
VERSION INFORMATION:
TNS for IBM/AIX RISC System/6000: Version 10.2.0.4.0 - Production
TCP/IP NT Protocol Adapter for IBM/AIX RISC System/6000: Version 10.2.0.4.0 - Production
Oracle Bequeath NT Protocol Adapter for IBM/AIX RISC System/6000: Version 10.2.0.4.0 - Production
Time: 30-AUG-2012 11:20:00
Tracing not turned on.
Tns error struct:
ns main err code: 12535
TNS-12535: TNS:operation timed out
ns secondary err code: 12560
nt main err code: 505
TNS-00505: Operation timed out
nt secondary err code: 78
nt OS err code: 0
Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=10.131.39.78)(PORT=41574))
查询了metalink文档Metalink文档ID 1384945.1。说可以根据nt main err code: 505来直接判断属于network的问题。不知道大家有什么看法，好像只是根据nt main err code: 505来判断，是不是有点证据不足？

ALERT.LOG ,LISTENER.LOG 同一时间点的日志以code形式贴出来
或者
如果需要发送附件，可以直接发邮件到 [email protected]

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[ask Maclean] sqlnet.log错误日志,能否根据错误日志来确定是network timeout或者是oracle timeout?

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