Thanks Zaxxon & zxmaus,
I don't know where to begin before this thread opened.
For iostat -A 2 10, vmstat -wt 2 10, vmstat -v and vmstat -s, I will post a snapshot for these once the issue occurs again.
For lsattr -El aio0, i did't get anything so i tried lsattr -El sys0 (i hope it will do).
--> See attachment - lsattr sys0.jpg
For "Do you use asynchronous I/O (AIO) and have it tuned?"
--> I have no idea for this since I am new here and I came here in the middle of the application roll-out to production. I wish I had a clue. No knowledge on the history of the servers here.
However i checked the I/O stat in nmon and here it is:
-->
If physical disk or LUN from SAN
-->Im not entirely sure if it's LUN from SAN but here's what i gathered:
from prtcfg/lsdev:
For oracle version:
-->Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bi
For disk layout/fs setup:
-->In sumarry we have three hdisks. rootvg resides in 2 hdisk and applications(oravg) resides in hdisk8.
Below are the details:
there are several oracle database instances in oravg also. here they are:
for filesystemio_options:
-->I have no idea where to locate this? is this executed or set in a configuration file?
for "...min or max distribution, blocksize ...
output of mount command will help and definitely mounting your oracle filesystems with noatime option and if you have a dedicated dump device with rbrw..."
--> I am totally alost with the min/max tuning. no idea for this yet.
Again. Thanks very much for the help. It's greatly appreciated
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