Concurrrent Instance Booting == Trivial Pursuit

Blog Frequency
I have found out the hard way that it is very difficult to keep the blogging stream going when one of your best friends of over 20 years passes away after a very short, fierce battle with cancer and your company gets swept up in a corporate takeover 2 days later. So, I’m understandably behind in my series about Oracle on Linux with NUMA hardware and a lot of other things. I actually have the material on the NUMA thread, but just haven’t been able to construct an entry. So, I thought I’d drop one in on a lighter note.

A Really Weird ps(1) Listing
What are the odds of this? In the following screen shot I have a ps(1) listing from one of my lab systems where I had two non-RAC instances running—one called PROD and the other called PRODD. What are the odds of having two PMON processes with sequential Linux process ids? Remember, the foreground process performing the instance start forks itself and execs off each background process which in turn execs again to change argv[0] (yes there are other reasons the server does a double exec()).   Anyway, it looked cool to me.

Check it out:

NOTE: Some browsers require you to right click->view for a clear image.

pps_1.jpg

 slash_proc

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