High CPU load with Library Cache Pin wit event.

Question

Oracle8i Enterprise Edition Release 8.1.6.0.0, 64 bit - Production
HP-UX B.11.00 U 9000/800 605309363 unlimited-user license
Currently CPU load is 100% with very less sessions in the database.
But i am finding Library Cache Pin wait event in top.
If i query v$latchholder i am not getting any rows..and in v$lacth_children
SQL> select SID,EVENT,WAIT_TIME,SECONDS_IN_WAIT,STATE from v$session_wait where EVENT='library cache pin';
       SID EVENT                                     WAIT_TIME SECONDS_IN_WAIT STATE
         8 library cache pin                                 0             863 WAITING
        90 library cache pin                                 0            3093 WAITING
        89 library cache pin                                 0            2566 WAITING
        57 library cache pin                                 0           27384 WAITING
        54 library cache pin                                 0           21029 WAITING
        53 library cache pin                                 0            7840 WAITING
        50 library cache pin                                 0            2620 WAITING
        47 library cache pin                                 0            6031 WAITING
        46 library cache pin                                 0            1241 WAITING
        41 library cache pin                                 0           15637 WAITING
       145 library cache pin                                 0             910 WAITING
       133 library cache pin                                 0            5124 WAITING
       111 library cache pin                                 0           15077 WAITING
        98 library cache pin                                 0            6563 WAITING
        94 library cache pin                                 0            2088 WAITING
        93 library cache pin                                 0            4592 WAITING
        92 library cache pin                                 0           14705 WAITING
        91 library cache pin                                 0           14798 WAITING
        36 library cache pin                                 0            1533 WAITING
        33 library cache pin                                 0            1491 WAITING
        28 library cache pin                                 0           13970 WAITING
        25 library cache pin                                 0            7630 WAITING
        11 library cache pin                                 0           12169 WAITING
        12 library cache pin                                 0            2352 WAITING
        14 library cache pin                                 0           19748 WAITING
SQL> select addr,name from v$latch where name='library cache';
ADDR             NAME
C00000006971D460 library cache
SQL> select latch#,name from v$latch_children where name='library cache';
    LATCH# NAME
       105 library cache
       105 library cache
       105 library cache
       105 library cache
       105 library cachePlease help me out to find actual cause of these latches and fix ?
-Yasser

Answer 1

bump
No-one?
The problem seems to have 'resolved itself' over the weekend incidentally (although I don't believe anything truly resolves itself in this manner - something must have changed).