RE: tracing specific sql_id in 12.2
Date: Tue, 25 Sep 2018 12:39:49 +0000
Message-ID: <72573_1537879212_5BAA2CAC_72573_8981_1_11cb003a6e784814b3f4e6511434f4d9_at_vontobel.com>
Oracle fixed the bug in 18c (tested against 18.3.0.0.180717)
Best regards,
Nenad
From: Noveljic Nenad
Sent: Freitag, 15. Dezember 2017 09:10
To: 'Ghassan Salem'
Cc: Tanel Poder; ORACLE-L (oracle-l_at_freelists.org)
Subject: RE: tracing specific sql_id in 12.2
Thank you for the information!
It would be nice if you could share more technical details. Unfortunately, the bug note has not been published on Metalink yet.
Do you know if the backport for 12.2 has been planned already?
Best,
Nenad
http://nenadnoveljic.com/blog/
From: Ghassan Salem [mailto:salem.ghassan_at_gmail.com]
Sent: Freitag, 15. Dezember 2017 09:03
To: Noveljic Nenad
Cc: Tanel Poder; ORACLE-L (oracle-l_at_freelists.org)
Subject: Re: tracing specific sql_id in 12.2
This is bug 25989066 (and 25994378), fixed in 18.1, no backport to 12.2 available yet. rgds
On Thu, Dec 14, 2017 at 11:14 PM, Noveljic Nenad <nenad.noveljic_at_vontobel.com<mailto:nenad.noveljic_at_vontobel.com>> wrote: You've been having fun :-)
=> Indeed: no bugs – less fun ☺ !
I geeked out a bit and tested this out too on 12.2 ... indeed, seeing the same behavior. Also interesting that when using ALTER SYSTEM to disable that event, it doesn't remove it from the other session (as far as eventdump shows)... so it's telling that even the ALTER command/event propagation doesn't seem to recognize this event being set (correctly) in these secondary sessions.
=> Are you also getting an ORA-0600 or ORA-07445 in some dbgd clean-up function? This would actually confirm a mess-up with the pointers in the linked list.
Thanks for looking at the problem!
Nenad
--
Tanel Poder
http://blog.tanelpoder.com<http://blog.tanelpoder.com/>
On Thu, Dec 14, 2017 at 6:48 PM, Noveljic Nenad <nenad.noveljic_at_vontobel.com<mailto:nenad.noveljic_at_vontobel.com>> wrote:
No multitenant, and tested with both new and existing 2. session. Most probably a bug - quite inconvenient.
However, I’ve managed to reconstruct the doubly linked list, where the system events are stored:
linked list ptr to root entry:
BCFFDE18+28: *BCFFDE40 = 989423B8 root_Entry:
989423B8+ 0: *989423B8 = 00000080
989423B8+B8: *98942470 = 96DDD200
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