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Hi,Yong Huang
The following events in statspack report is the wait events when OPTIMIZER_FEATURES_ENABLE is set to 9.2.0.
I will paste the wait events when OPTIMIZER_FEATURES_ENABLE is set to 9.0.0 as soon as I can.
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
-------------------------------------------- ------------ ----------- --------
CPU time 1,516 93.03
db file scattered read 61,810 65 3.99
log file sync 54 29 1.77
db file sequential read 54,193 12 .76
log file parallel write 1,593 2 .15
-------------------------------------------------------------
Wait Events for DB: TEST Instance: test Snaps: 36 -38
-> 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
---------------------------- ------------ ---------- ---------- ------ --------
db file scattered read 61,810 0 65 1 52.0
log file sync 54 3 29 534 0.0
db file sequential read 54,193 0 12 0 45.6
log file parallel write 1,593 0 2 2 1.3
process startup 9 0 2 210 0.0
SQL*Net more data to client 52,894 0 2 0 44.5
control file parallel write 493 0 1 2 0.4
control file sequential read 298 0 0 0 0.3
direct path read 8,514 0 0 0 7.2
direct path write 10,890 0 0 0 9.2
SQL*Net break/reset to clien 8 0 0 5 0.0
latch free 6 0 0 0 0.0
LGWR wait for redo copy 1 0 0 0 0.0
SQL*Net message from client 219,747 0 7,091 32 184.8
wakeup time manager 50 50 1,445 28903 0.0
jobq slave wait 210 201 606 2885 0.2
SQL*Net message to client 219,747 0 0 0 184.8
SQL*Net more data from clien 166 0 0 0 0.1
-------------------------------------------------------------
Background Wait Events for DB: TEST Instance: test Snaps: 36 -38
-> ordered by wait time desc, waits desc (idle events last)
Avg
Total Wait wait Waits
Event Waits Timeouts Time (s) (ms) /txn
---------------------------- ------------ ---------- ---------- ------ --------
log file parallel write 1,593 0 2 2 1.3
control file parallel write 493 0 1 2 0.4
db file scattered read 33 0 0 4 0.0
db file sequential read 33 0 0 4 0.0
control file sequential read 196 0 0 0 0.2
rdbms ipc reply 5 0 0 1 0.0
LGWR wait for redo copy 1 0 0 0 0.0
latch free 1 0 0 0 0.0
rdbms ipc message 2,979 1,475 4,509 1514 2.5
pmon timer 497 497 1,486 2991 0.4
smon timer 100 0 1,485 14851 0.1
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