Two instances with same name on the same Server

From: <Rajesh.Rao_at_jpmchase.com>
Date: Tue, 30 Apr 2002 13:47:40 -0800
Message-ID: <F001.004543BB.20020430134740@fatcity.com>

Hello Folks,

I was teaching DBA stuff to a newbie, and I had him play with an Oracle 7.3.4 instance on an old HP box. I was teaching him about oradebug, ipcs and how to associate shared memory segments with an Oracle Instance. After some time, he came back and said there were 2 Oracle instances with the same name running.

I did a ps -ef|grep pmon and was indeed surprised to find two process with the same SID running. An ipcs showed two Oracle Id's. I connected to the instance, and shut it down. It now showed only one pmon process, which I was not able to connect to, and had to kill all the background process. He does not remember the exact sequence of steps that he did. I tried to retrace the steps from whatever he said, but to no avail. I brought up the instance, did an ipcsrm, and tried to bring up another instance, all to nothing. 7.3.4 is the only Oracle version installed on this box. Any thoughts on this? I am curious to know.

Raj

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Author:
  INET: Rajesh.Rao_at_jpmchase.com

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