RE: Oracle trace file on/off

From: Deshpande, Kirti <kirti.deshpande_at_verizon.com>
Date: Tue, 29 Jan 2002 10:58:00 -0800
Message-ID: <F001.003FF3AB.20020129105100@fatcity.com>

Here you go...

Find the OSPID for the suspected user (other than pmon, smon and their famiy)

select s.username, p.spid
from v$session s, v$process p
where s.paddr = p.addr;

2) Use oradebug to connect to that spid (here I have 26073, and the session was tracing event 10046)

SVRMGR> oradebug setospid 26073
Oracle pid: 11, Unix process pid: 26073, image: oracle_at_myservername (TNS V1-V3)

3) Dump the events for the connected spid...

SVRMGR> oradebug dump events 1
Statement processed.

4) Look in the trace file in the udump directory..

2002-01-29 09:58:55.847 Dump event group for level SESSION TC Addr Evt#(b10) Action TR Addr Arm Life 400E1B68 10046 1 400e1ba8 0 0 TR Name TR level TR address TR arm TR life TR type CONTEXT 8 ffffffff -1 2 0 ^^^^^^^^^^^^^^^^^^^ This session is tracing.... event 10046 context at level 8 5) Dump it again (from 3)... 6) Look in the trace file again....
2002-01-29 10:01:57.316 WAIT #1: nam='SQL*Net message from client' ela= 34381 p1=1650815232 p2=1 p3=0
PARSING IN CURSOR #1 len=56 dep=0 uid=80 oct=42 lid=80 tim=2447763925 hv=3475487367 ad='a0de14e0' alter session set events '10046 trace name context off' END OF STMT PARSE #1:c=0,e=2,p=0,cr=0,cu=0,mis=1,r=0,dep=0,og=4,tim=2447763926 EXEC #1:c=0,e=0,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=4,tim=2447763927
- Oops! The the smart A$$ turned off the trace, But got caught!!!

Following is what you see in the trace file when the session is not tracing.....

Dump event group for level SESSION
TC Addr Evt#(b10) Action TR Addr Arm Life

I thank Ross for his nifty hints and his time last night, when I was having a 'brain fart' while testing this...

I learned something new from him... :)

Cheers!

Kirti

-----Original Message-----
Sent: Tuesday, January 29, 2002 11:06 AM To: Multiple recipients of list ORACLE-L

Send them doggies home, KD, it's a done deal.

;-)

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

You may turn the trace on or off that way, but how do you interrogate it to find its event settings?

Kirti

-----Original Message-----
Sent: Monday, January 28, 2002 6:42 PM
To: 'Deshpande, Kirti'; ORACLE-L_at_fatcity.com

ORADEBUG SETORAPID, would make "current session" whatever you like, no?

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

>From what I know, there is no way to find if a session has turned on the tracing unless it is your own session. DBMS_SYSTEM.read_ev can you tell you if the current session is tracing or not, but it can not interrogate other sessions.

The only way I know is to check the trace files generated in the udump directory.. but it is not fool-proof.

And since you can not find out who is tracing at the moment, you can not stop it..

Ross, I sure would like to learn the trick. Can you please post it?? :)

Thanks.

Kirti
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Deshpande, Kirti INET: kirti.deshpande_at_verizon.com

--

Please see the official ORACLE-L FAQ: http://www.orafaq.com
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Author: Deshpande, Kirti
INET: kirti.deshpande_at_verizon.com

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