"Hillman, Alex" <[EMAIL PROTECTED]> on 08/01/2001 02:16:31 PM
Please respond to [EMAIL PROTECTED]
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
cc: (bcc: Chaim Katz/Completions/Bombardier)
All,
I just tried a log miner test (without the logminer dictionary). It wasn't so
bad:
Here is the blocker:
1 select sid,type,lmode,request,block,round(ctime/60,2) ctime
2 from v$lock
3 where block != 0
SID Lock Type Mode Held Mode Requested Blocking? Minutes Blocked
---------- --------------- ---------- -------------- ---------- ---------------
32 TX 6 0 1 33.83
Here is the blocker's transaction:
1 select t.xidusn,t.xidslot,t.xidsqn
2 from v$transaction t, v$session s
3 where t.addr = s.taddr and
4 s.sid=32;
XIDUSN XIDSLOT XIDSQN
---------- ---------- ----------
4 55 44118
Load a redo log:
1 begin
2 sys.dbms_logmnr.add_logfile
3 ('C:\ORACLE\ORADATA\DEV816\REDO02.LOG',
4 sys.dbms_logmnr.new);
5 sys.dbms_logmnr.start_logmnr;
6 end;
PL/SQL procedure successfully completed.
1 select sql_redo
2 from v$logmnr_contents
3 where xidusn=4 and
4 xidslt=55 and
5 xidsqn=44118;
6 and rownum < 4;
SQL_REDO
----------------------------------------------------------------------------------------------------
set transaction read write;
delete from "UNKNOWN"."Objn:45095" where "Col[1]" = HEXTORAW('c24a46') and
"Col[2]" = HEXTORAW('534d
495448') and "Col[3]" = HEXTORAW('434c45524b') and "Col[4]" = HEXTORAW('c25003')
and "Col[5]" = HEXT
ORAW('77b40c11010101') and "Col[6]" = HEXTORAW('c209') and "Col[7]" IS NULL and
"Col[8]" = HEXTORAW(
'c115') and ROWID = 'AAALAnAADAAAJAzAAA';
Check the table name
1 select owner,object_name
2 from dba_objects
3* where object_id=45095
OWNER OBJECT_NAME
------------------------------ ------------------------------
SCOTT EMP
Voila, the blocking statement is: DELETE FROM emp. (I limited the output, but
there are actually 14 sql_redo statmements that differ only in the value of the
rowid.) (Loading the right log file involves some trial and error.) (Remember
you saw it here first.)
Chaim
If you had SQL trace available - you would be able to find SQL for the
session. One time on this list I heard mention about x$trace - like it has
all data of the event 10046 trace only not in the trace file but in memory.
Anumbody has some infp about it?
Alex Hillman
-----Original Message-----
Sent: Wednesday, August 01, 2001 1:34 PM
To: Multiple recipients of list ORACLE-L
Chaim,
That could work. Logminer wasn't around when I first had this problem, and I
haven't spent time working with it.
>From what I know from listening to Joe present on it though, it would be a
more complicated process than I want. I'd have to be sure that the
dictionary map was always up to date, and I would have to go back and look
through all the archived logs as well as the online ones, in case the
statement had been archived off. It also sounds like it would be intensely
manual.
Joe -- any thoughts on this?
I want something that runs FAST, so I can clear locks quickly. And then go
on to the fun stuff of killing duhvelopers.
Rachel (today it is hot and humid here, and today the AC in the office
doesn't work.... killing duhvelopers is looking like more and more fun)
>From: [EMAIL PROTECTED]
>Reply-To: [EMAIL PROTECTED]
>To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
>Subject: RE: Evaluation questions
>Date: Wed, 01 Aug 2001 07:51:19 -0800
>
>
>
>
>
>
>
>
>"Rachel Carmichael" <[EMAIL PROTECTED]> on 07/31/2001 11:48:02 AM
>
>Please respond to [EMAIL PROTECTED]
>
>To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
>cc: (bcc: Chaim Katz/Completions/Bombardier)
>
>
>
>
>Rachel,
>
>I don't know how to retreive the locking sql either, but reading this
>discussion
>it occurred to me that 1) in v$session (of the blocked session) we have
>the
>file#,block#,row# that is being waited on. Maybe with logminer (or
>something
>like it) we could find the most recent SQL that affected this block/row?
>
>Chaim
>
>
>
>Gary,
>
>I wish it did. I worked with Q Diagnostics for quite a while, and worked
>directly with the developer (although calling John Beresniewicz a developer
>is an understatement, he's brilliant!) on answering that problem.
>
>Neither Q nor anything from Platinum (does that tell you how long ago it
>was?) was able to find the locking sql with any precision. The answer I got
>back from both of them was "if you figure out how to do it, PLEASE let us
>know"
>
>Having said that, Q Diagnostics was indeed bliss... I fixed locks before
>users complained, was able to model and monitor bad SQL and fix it and had
>lots of good info directly on the desktop.
>
>Rachel
>
>
> >From: "Gary Weber" <[EMAIL PROTECTED]>
> >Reply-To: [EMAIL PROTECTED]
> >To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
> >Subject: RE: Evaluation questions
> >Date: Tue, 31 Jul 2001 06:11:36 -0800
> >
> >Rachel,
> >
> >I believe your second wish from below (locking SQL) has been granted by
> >former Savant product called Q Diagnostic Center, currently owned by
> >Precise. Drill down to locks, including user and SQL info - its a bliss.
> >
> >Gary Weber
> >Senior DBA
> >Charles Jones, LLC
> >609-530-1144, ext 5529
> >
> >-----Original Message-----
> >Carmichael
> >Sent: Tuesday, July 31, 2001 8:56 AM
> >To: Multiple recipients of list ORACLE-L
> >
> >
> >one I want is "can the package tell me when a datafile extends"
> >
> >also, I want (and have NEVER found) a package that can tell me the
>locking
> >SQL, when the locker has gone on and done other SQL after the lock.
> >
> >ex.
> >
> >user1 does:
> > select * from table for update where <some where clause>
> > update table
> > insert into second table
> >and does not commit
> >
> >user2 comes in and tries to update the first table, one of the rows that
> >meets user1's where clause
> >
> >I can tell that user1 is blocking user2 but not the SQL that is doing the
> >blocking. That's useful in beating duhvelopers about the head in order to
> >get the code fixed.
> >
> >
> >
> > >From: "O'Neill, Sean" <[EMAIL PROTECTED]>
> > >Reply-To: [EMAIL PROTECTED]
> > >To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
> > >Subject: Evaluation questions
> > >Date: Tue, 31 Jul 2001 02:25:49 -0800
> > >
> > >I'm still slogging away at selection process of DB monitor tool. I'm
>now
> > >at
> > >stage where I'm compiling a list of specific tasks I'd like to take the
> > >contenders through and score them on same.
> > >E.G.
> > >Can package alert if Oracle DB goes down?
> > >Can package alert if Control File extends?
> > >
> > >I'd appreciate your feedback on what you think the monitor package
>should
> > >be
> > >able to do, ya know those things you want to know about before anyone
> >else
> > >does!. I'm particularly fishing for events that might be a bit more
> > >obscure
> > >yet still useful to monitor.
> > >
> > >
> > >Sean :)
> > >
> > >Rookie Data Base Administrator
> > >Oracle 7.3.3, 8.0.5, 8.1.7 - NT, W2K
> > >[0%] OCP Oracle8i DBA
> > >[0%] OCP Oracle9i DBA
> > >-------------------------------- ------------
> > >Organon (Ireland) Ltd.
> > >E-mail: [EMAIL PROTECTED] [subscribed: Digest Mode]
> > >
> > >Visit: http://groups.yahoo.com/group/Oracle-OCP-DBA
> > >
> > >"Nobody loves me but my mother... and she could be jivin' too." - BB
> >King
> > >
> > >--
> > >Please see the official ORACLE-L FAQ: http://www.orafaq.com
> > >--
> > >Author: O'Neill, Sean
> > > INET: [EMAIL PROTECTED]
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> >Author: Rachel Carmichael
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