How to interprete P* value of v$session in 10g??( event=library cache lock)

Question

Hi, all.
The database is 2 node RAC (10.2.0.2.0) on 32-bit windows 2003 EE SP1.
One session on Node 2 is waiting for "library cache lock" to be released
for "178874" seconds.
The detail for the session is as follows:
SID : 444
TYPE : USER
PROGRAM : ORACLE.EXE(J001)
MODULE : EM_PING
EVENT : library cache lock ▲
WAIT_CLASS : Concurrency
P1TEXT : handle address ▲
P1 : 1206060532 ▲
P1RAW : 47E305F4　▲
P2TEXT : lock address　▲
P2 : 1108075084 ▲
P2RAW : 420BE24C ▲
P3TEXT : 100*mode+namespace ▲
P3 : 301 ▲
P3RAW : 0000012D　▲
WAIT_IN_SECONDS : 178874
BLOCKING_SESSION : <-- NONE
There is no blocking session in v$lock.
Could you teach me how to interprete P* value of v$session in case of "library cache lock"??
Thanks and Regards.

Answer 1

Dear user449027.
Thanks for your reply.
column wevent format a20
column bevent format a20
select
waiter.sid waiter,
waiter.p1raw wlockp1,
waiter.event wevent,
blocker_event.sid blocker,
blocker_event.event bevent
from
x$kglpn p,
gv$session blocker_session,
gv$session_wait waiter,
gv$session_wait blocker_event
where
p.kglpnuse=blocker_session.saddr and
p.kglpnhdl=waiter.p1raw and
(waiter.event like 'library cache lock' ) and
blocker_event.sid=blocker_session.sid
order by
waiter.p1raw,waiter.sid
returns NO rows.
The database is 2 Node RAC db.
Do both instances share "x$kglpn"??
On Node2, sid=444 session is waiting for library cache lock.
I issued the following script.
select kglnaobj, kgllkreq
from x$kgllk x , v$session s
where s.saddr = x.kgllkses
and x.kgllkhdl=s.p1raw
and s.sid = 444;
KGLNAOBJ KGLLKREQ
MGMT_JOB_EXEC_SUMMARY 2
The owner of MGMT_JOB_EXEC_SUMMARY is sysman.
And MGMT_JOB_EXEC_SUMMARY is valid.
I issued "DESC MGMT_JOB_EXEC_SUMMARY".
"DESC MGMT_JOB_EXEC_SUMMARY" hangs.
The sid=444 session is waiting for almost 2 days.
I stopped dbconsole and emagent.
Thanks and Regards.