RE: [EXTERNAL] RE: AQ process waiting on "library cache: mutex X"
Date: Wed, 14 Jul 2021 14:52:23 +0000
Message-ID: <1aa9e52684714c36b4f332b723b9def7_at_vontobel.com>
Hi Amir,
You could get stacks without the OS access:
Oradebug setorapname (or setorapid or setospid) -you have to connect to AQ process oradebug SHORT_STACK
Do a couple of those to see if they repeat.
By the way, you can replace session_type='BACKGROUND' with "program2 like '%Qnn%'" when you're interested only in AQ processes.
Best regards,
Nenad
From: Hameed, Amir <amir.hameed_at_sleepnumber.com>
Sent: Mittwoch, 14. Juli 2021 16:43
To: Noveljic Nenad <nenad.noveljic_at_vontobel.com>; oracle-l_at_freelists.org
Subject: RE: [EXTERNAL] RE: AQ process waiting on "library cache: mutex X"
Thank you, Nenad. Please see the output from ASHTOP. The highlighted lines are Qnnn processes.
Total Distinct Distinct
Seconds AAS %This SESSION_ID USERNAME SQL_ID I SQL_OPNAME TOP_LEVEL_CALL_NAME FIRST_SEEN LAST_SEEN Execs Seen Tstamps
--------- ------- ------- ---------- --------------- ------------- - -------------------- ------------------------------ ------------------- ------------------- ---------- --------
7103 1.0 54% | 28 SYS N VERSION2 2021-07-14 07:36:23 2021-07-14 09:36:22 1 7103
5820 .8 44% | 607 SYS N VERSION2 2021-07-14 07:36:23 2021-07-14 09:36:22 1 5820
91 .0 1% | 1066 SYS N LOGOFF 2021-07-14 07:36:57 2021-07-14 09:35:56 1 91
78 .0 1% | 452 SYS N 2021-07-14 07:41:21 2021-07-14 09:35:06 1 78
33 .0 0% | 451 SYS N 2021-07-14 07:36:35 2021-07-14 09:35:00 1 33
28 .0 0% | 1 SYS N 2021-07-14 07:41:49 2021-07-14 09:32:59 1 28
20 .0 0% | 602 SYS N 2021-07-14 08:02:00 2021-07-14 09:30:53 1 20
11 .0 0% | 302 SYS N 2021-07-14 07:38:57 2021-07-14 09:28:37 1 11
6 .0 0% | 157 SYS N VERSION2 2021-07-14 07:37:57 2021-07-14 09:35:00 1 6
5 .0 0% | 1052 SYS N 2021-07-14 07:49:10 2021-07-14 09:28:45 1 5
4 .0 0% | 301 SYS N 2021-07-14 07:58:03 2021-07-14 09:26:02 1 4
2 .0 0% | 21 SYS bunssq950snhf N INSERT VERSION2 2021-07-14 09:00:33 2021-07-14 09:00:34 1 2
2 .0 0% | 903 SYS N 2021-07-14 07:50:09 2021-07-14 08:27:55 1 2
2 .0 0% | 1053 SYS N VERSION2 2021-07-14 08:06:16 2021-07-14 08:42:26 1 2
1 .0 0% | 7 SYS N VERSION2 2021-07-14 07:52:24 2021-07-14 07:52:24 1 1
15 rows selected.
I will try to get pstack of the above two processes. I don't have access to the oracle account, I will have to ask someone to do it for me.
Thank you!
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