Hdisk0 and hdisk1 is showing 100% busy most of the time

Hi,
hdisk0 and hdisk1 is showing 100% busy most of the time.During 100% busy database and application goes hang even a simple sql query or simple os command(ex: ls -lrt) takes long time to execute.whereas hdisk0 and hdisk1 not hit where oracle home and oracle datafiles is located.hdisk0 and hdisk1 hit /var,/tmp,/usr,/opt etc.
Regards,
Sajid

What OS ?
--AIX 5.3
What database version ?
--10.2.0.4.0
What kind of filesystem ?
Filesystem GB blocks Free %Used Iused %Iused Mounted on
/dev/hd4 1.00 0.95 6% 1975 1% /
/dev/hd2 4.00 1.45 64% 39807 11% /usr
/dev/hd9var 2.00 0.94 53% 577 1% /var
/dev/hd3 6.00 3.13 48% 4401 1% /tmp
/dev/hd1 1.00 0.90 11% 234 1% /home
/proc - - - - - /proc
/dev/hd10opt 0.25 0.18 29% 1284 3% /opt
/dev/fslv00 750.00 198.92 74% 1620391 4% /vol01
/dev/fslv01 460.00 200.18 57% 524775 2% /vol02
/dev/fslv02 185.00 44.46 76% 440425 5% /vol03
What is on those disks ?
rmsdb:/>lspv -l hdisk0
hdisk0:
LV NAME LPs PPs DISTRIBUTION MOUNT POINT
hd10opt 1 1 00..00..01..00..00 /opt
hd1 4 4 00..00..04..00..00 /home
lg_dumplv 8 8 00..08..00..00..00 N/A
hd5 1 1 01..00..00..00..00 N/A
hd8 1 1 00..00..01..00..00 N/A
hd6 77 77 00..77..00..00..00 N/A
hd2 16 16 00..00..16..00..00 /usr
hd4 4 4 00..00..04..00..00 /
hd3 24 24 00..00..24..00..00 /tmp
hd9var 8 8 00..00..08..00..00 /var
rmsdb:/>lspv -l hdisk1
hdisk1:
LV NAME LPs PPs DISTRIBUTION MOUNT POINT
hd10opt 1 1 00..00..01..00..00 /opt
hd1 4 4 00..00..04..00..00 /home
lv02 7 7 00..07..00..00..00 /mkcd/cd_images
loglv01 1 1 00..01..00..00..00 N/A
hd5 1 1 01..00..00..00..00 N/A
hd8 1 1 00..00..01..00..00 N/A
hd6 77 77 00..77..00..00..00 N/A
hd2 16 16 00..00..16..00..00 /usr
hd4 4 4 00..00..04..00..00 /
hd3 24 24 00..00..24..00..00 /tmp
hd9var 8 8 00..00..08..00..00 /var
What database processes are running ?
--As i observed while running oracle batch running
Did you look at memory and cpu and swap usage at the OS level ? Did you look at what OS process is using the most resource ?
--I use topas to look this but i did not get,How can i look what os process is using the most
resource?
Did you run a statspack or awr report on the database to identify what is running ?
--Nohting as Oracle support said
Regards,
Sajid

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