Threw a few views and a few SQLs out there that have always worked for me in
giving me just about everything I needed to know. Have not tested in a couple
years but worked on Oracle 12 at one point. Most of them probably found here
directly or indirectly over the years.
https://gist.github.com/ethanpost/8004370dcfa7a6a6516f5bed0c18db74
Some digging in gv$session_event may also give you what you need if your
licensed.
Ethan Post
https://www.linkedin.com/in/ethanraypost/
https://arclogicsoftware.com
https://twitter.com/poststop
From: oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx> On Behalf
Of Lyall Barbour
Sent: Tuesday, October 23, 2018 10:48 AM
To: oracle-l <oracle-l@xxxxxxxxxxxxx>
Subject: How to find the locking "event"
Hello,
Debugging Off-the-shelf applications. Best part of my job...
Oracle 12.1.0.2 - Multitenant
SLES 11 SP4
I have found that an INSERT is having to wait a ton on TX: Row Lock
Contention from an intense Document Management application bought, installed
and configured about a year and a half ago - Open Text.
Here's my lock/block query that's been the most useful to this point:
SELECT o.object_name, t.start_time, sysdate, s.sid, s.status
, s.machine, s.sql_id
, to_char(s.logon_time,'DD/MON/YY HH24:MI:SS') logon_time
FROM v$transaction t, v$session s, v$locked_object l, dba_objects o,
dba_blockers b
WHERE s.saddr = t.ses_addr
and s.sid = l.session_id
and l.object_id = o.object_id
and s.sid = b.holding_session
ORDER BY start_time;
the results of the query find that one blocking session has an open Transaction
for about 15 to 30 seconds, with locks on 15 tables. Other sessions are
waiting to insert into one of those tables and really bogging down the system.
How do i find the syntax/code that the blocking session ran to lock those 15
objects, in the first place?
OBJECT_NAME START_TIME SYSDATE
SID STATUS MACHINE
SQL_ID LOGON_TIME
------------------------------ -------------------- ---------------------
---------- --------
---------------------------------------------------------------- -------------
---------------------------
DTREEACL 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
DTREECORE 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
LLATTRDATA 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
LLATTRBLOBDATA 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
DTREEMULTILINGUAL 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
DSUGGESTWORDSPENDING 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
NOTIFYEVENTS 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
WEBNODESMETA_EN_US 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
DBROWSEANCESTORSCORE 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
DTREEANCESTORS 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
DFACET_OWNER 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
DFACET_OBJECTTYPE 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
DFACET_MODIFYDATE 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
DFACET_ATTR_2V4D_R 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
DTREENOTIFY 10/23/18 11:34:56 23-OCT-18 11.35.23 AM
668 INACTIVE NGIC\xxxxxxxxxxx
fppmu8hcw3y1d 18/OCT/18 22:41:25
TIA
Lyall Barbour
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