High waits/Timeouts - log file parallel write
- From: TP <pele_00_2000@xxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Mon, 27 Feb 2006 14:09:10 -0800 (PST)
Hello all,
I seeing high Waits, Timeouts from one the
problem instance.
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~
% Total
Event
Waits Time (s) Ela Time
--------------------------------------------
------------ ----------- --------
CPU time
8 40.51
control file parallel write
642 5 25.56
db file sequential read
343 2 9.40
log file parallel write
9,697 2 7.99
log file sync
425 1 5.69
-------------------------------------------------------------
^LWait Events for DB: C3PO Instance: C3PO
Snaps: 15 -16
-> s - second
-> cs - centisecond - 100th of a second
-> ms - millisecond - 1000th of a second
-> us - microsecond - 1000000th of a second
-> ordered by wait time desc, waits desc (idle
events last)
Avg
Total Wait wait Waits
Event Waits
Timeouts Time (s) (ms) /txn
---------------------------- ------------
---------- ---------- ------ --------
control file parallel write 642
0 5 8 1.4
db file sequential read 343
0 2 6 0.7
log file parallel write 9,697
8,429 2 0 21.1
log file sync 425
0 1 3 0.9
process startup 30
0 1 38 0.1
SQL*Net break/reset to clien 3,522
0 1 0 7.7
control file sequential read 333
0 0 1 0.7
db file scattered read 3
0 0 15 0.0
LGWR wait for redo copy 1,142
0 0 0 2.5
db file parallel write 873
0 0 0 1.9
SQL*Net more data to client 207
0 0 0 0.5
latch free 29
29 0 0 0.1
buffer busy waits 2
0 0 0 0.0
-----------------------------------------
It seems like I'm having some issue with the LGWR
"log file parallel write" (timeouts).
Can you suggest and/or provide some
recommendations? The DB version is 9205 on
Solaris 2.9.
Thanks in advance!
Tom
" ,--o
-\\_<_ Do you ride? "
(*)/-'(*)
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