RE: startup takes long time on 10gR2.
Date: Fri, 12 Sep 2008 07:55:18 PDT
On Fri Sep 12 6:05 , "Johnson, William L (TEIS)" sent:
> How many data files are in the database?
> Hameed, Amir wrote:
> you may find that the process starting the database is waiting on "shmat" call.
That happens at startup nomount time. The original poster said that step is fast.
There certainly is no shortage of interesting guesses. Now why don't we look at the wait events and alert log during that 10 minute open phase to discover the actual cause.
The wait event views become available in nomount mode. From another SYSDBA session during the open phase, examine v$system_event and v$session_event' largest values for time_waited for the starting-up SYSDBA shadow process.
>> raja rao wrote
>> One of our test instances, the startup process is
>> taking more time.
>> especially, the open phase takes long
>> time.(around 10 mins)
>> instance allocation and mount phase are quick.