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
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-----Original Message-----
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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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