FORMATTED CAPACITY (GB) __________________18.21
AVERAGE SECTORS PER TRACK ________________213 rounded down
ACTUATOR TYPE ____________________________ROTARY VOICE COIL
TRACKS ___________________________________167,008
CYLINDERS ________________________________6,962 user
HEADS ______PHYSICAL______________________24
DISCS (3 in) _____________________________12
MEDIA TYPE _______________________________THIN FILM/MR
RECORDING METHOD _________________________PRML 8/9 PR4
INTERNAL TRANSFER RATE (mbits/sec)________152 to 231
EXTERNAL TRANSFER RATE (mbyte/sec) _______40 Sync
Low Voltage Differential(LVD) _______80 Sync
SPINDLE SPEED (RPM) ______________________10,025
AVERAGE LATENCY (mSEC) ___________________2.99
BUFFER (/optional) _______________________1MB/4MB
Read Look-Ahead, Adaptive,
SQL*Net message from client 9595869
pmon timer 1880177
virtual circuit status 1877869
smon timer 1875449
dispatcher timer 1874318
SQL*Net break/reset to client 49746
control file parallel write 18026
db file sequential read 3947
log file sync 1456
db file scattered read 1017
---------------------------------------------------------------- -----------
log file parallel write 616
Null event 411
library cache pin 315
refresh controlfile command 292
reliable message 273
rdbms ipc reply 146
control file sequential read 108
log file switch completion 58
SQL*Net more data to client 45
enqueue 27
file identify 24
---------------------------------------------------------------- -----------
log file single write 23
latch free 19
SQL*Net message to client 17
file open 16
buffer busy waits 13
SQL*Net more data from client 6
direct path read 5
log file sequential read 0
db file parallel write 0
instance state change 0
direct path write 0
---------------------------------------------------------------- -----------
LGWR wait for redo copy 0
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Mohan, Ross
Sent: Thursday, March 22, 2001 11:02 AM
To: Multiple recipients of list ORACLE-L
Subject: RE: Log writer
Disk mfr?
rpm?
seek/access times?
diskperf -y set already?
CPU,I/O, or diskbound system?
log buffer size? log file size?
what else is on the "separate" disks? anything?
separate disks share a controller?
select event, time_waited from v$system_event order by 2 desc; results?just a few questions that come to mind....
-----Original Message-----
From: Kevin Kostyszyn [mailto:[EMAIL PROTECTED]]
Sent: Thursday, March 22, 2001 8:50 AM
To: Multiple recipients of list ORACLE-L
Subject: Log writer
Hi all,
I am testing out Spotlight on Oracle from Quest Software. It is telling me
that my log writer process is slow. What it looks like it is saying is that
most disks take about 20ms to right the data and mine is taking on average
about 40ms. I don't know why, they are scsi drives and there isn't that
much stress on the syste. Anyway, I moved the redo logs to seperate disks,
but I fear I may have made an error. Instead of moving each "group" to
seperate hard disks, I moved the members of each group to seperate hard
disks. Anyway, I am wondering if anyone has advice on this problem.Sincerely,
Kevin Kostyszyn
DBA
Dulcian, Inc
www.dulcian.com
[EMAIL PROTECTED]--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: Kevin Kostyszyn
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