The script as such works, but I do not like user scripts
accessing objects owned by SYS directly. I normally use
modified version of utlockt.sql in which dba_locks_temp
and lock_holders are global temporary tables in my schema
which do not get dropped & re-created every time.
On Mon, 2003-10-06 at 11:29, Jamadagni, Rajendra wrote:
> Hi all,
>
> I am using following script to see locks in the DB. Do you see any
> problems with it?
>
> ======================== cut here =====================
> connect / as sysdba
> set linesize 200 feedback off heading on pagesize 100
> column sid format a9
> column res heading 'Resource Type' format a15 trunc
> column id1 format 9999999 noprint
> column id2 format 9999999 noprint
> column lmode heading 'Lock Held' format a14
> column request heading 'Lock Req.' format a14
> column serial# format 99999
> column username format a10
> column terminal heading Term format a8
> column table_name format a20 trunc
> column owner format a10
> column inst_id format a5
> select --+ no_merge(l) no_merge(s)
> (select instance_name
> from sys.gv_$instance
> where instance_number = l.inst_id) inst_id,
> l.sid || ',' || s.serial# sid,
> s.username,
> replace(s.terminal,'WTS-') terminal,
> decode(l.type,
> 'RW','RW-Row Wait Enq',
> 'TM','TM-DML Enq',
> 'TX','TX-Trans Enq',
> 'UL','UL-User',l.type||'-System') res,
> t.name table_name,u.name owner,
> l.id1,l.id2,
> decode(l.lmode,1,'No Lock',
> 2,'Row Share',
> 3,'Row Excl',
> 4,'Share',
> 5,'Shr Row Excl',
> 6,'Excl',null) lmode,
> decode(l.request,1,'No Lock',
> 2,'Row Share',
> 3,'Row Excl',
> 4,'Share',
> 5,'Shr Row Excl',
> 6,'Excl',null) request
> from sys.gv_$lock l, sys.gv_$session s, sys.user$ u,sys.obj$ t
> where l.sid = s.sid
> and s.type != 'BACKGROUND'
> and t.obj# = l.id1
> and u.user# = t.owner#
> and l.inst_id = s.inst_id
> /
> prompt
> set feedback on
> prompt
> exit
> ======================== cut here =====================
>
> Btu here is the problem ... once in a while (aka many times a day)
> when we run this script, we see objects as locked by some user which
> should NEVER be even accessed. We have one schema that deals with out
> affiliates, and it is practically independent of other schema in the
> database. Still sometimes we see objects within the affiliate schema
> beign accesses by other users who have nothing to do (or the code they
> execute has nothing to do) with the objects displayed in the list.
>
> One peculier thing I have noted, is affiliate schema used private
> synonyms and the objects listed in the lock scripts are _always_
> private synonyms pointing to objects in the affiliate schema and the
> private synonym belongs to the user who is _not_ the locking user.
>
> e.g.
>
> ABC1 47,820 BROWNBRE BRS02 TX-Trans Enq
> SYSTEM_NETWORK_HIST MURPHYM Excl
>
> here locking user ius brownbre locking system_network_hist owned by
> murphym. Actually the table is owned by affiliate and murphym has a
> private synonym to the table.
>
> Any clues? DB is 9202 RAC.
> TIA
> Raj
>
> --------------------------------------------------------------------------------
> Rajendra dot Jamadagni at nospamespn dot com
> All Views expressed in this email are strictly personal.
> QOTD: Any clod can have facts, having an opinion is an art !
--
Mladen Gogala
Oracle DBA
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Received on Mon Oct 06 2003 - 11:09:32 CDT
