RE: Deadlock Interpretation Assistance Requested

Riyaj,

Thanks for responding. This is the first deadlock they have seen in 6 months
(they used to see a lot due to an application coding issue). So I agree with
waiting and seeing if this problem comes up again before putting a *lot* of time or resources into it, but, I still needed to put *some* time into it to try to determine if this was an application coding issue. I'll pass it back over to the DBA's letting them know that based on what I found and read, as well as back channel comments from others, that this doesn't "appear" to be a coding issue. They can decide what to do from there. And I bet they will take the same approach you recommend.

Regards,

Larry G. Elkins
elkinsl_at_flash.net
-----Original Message-----
Riyaj_Shamsudeen_at_i2.com
Sent: Sunday, February 11, 2001 9:40 PM

Hi

    In my opinion, this is an ITL issue. When a process need an ITL and have to wait for it , then it pseudo randomly selects a locked row (from that block) and enqueues itself in to the waiters queue. But the row_waited information in v$session will be null. In rare cases, it is possible for the deadlock to occur if the ITL waiter holds the row that is needed by the other process.

    I would ask, what is the frequency of this deadlock ? Is this the first occurrence ? If it is the first occurrence, then I would wait for the next occurrence and then spend time and resource.

   Hope this helps!!
Thanks
Riyaj "Re-yas" Shamsudeen
Certified Oracle DBA

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