RE: Monitoring Interval Granularity (iostat)
- From: John Kanagaraj <john.kanagaraj@xxxxxxx>
- To: "'mkb125@xxxxxxxxx'" <mkb125@xxxxxxxxx>, oracle-l@xxxxxxxxxxxxx
- Date: Fri, 15 Jul 2005 11:21:25 -0700
Mohammed,
Keep in mind that the *first* line of iostat (and vmstat for that matter) is
always the average since the last OS restart. My understanding is that
iostat/vmstat loading would be minimal and a minute's interval should be
fine. DO you use a SAN or NAS? If so, you might also consider their inbuilt
tools.
All the best,
John Kanagaraj <><
DB Soft Inc
Phone: 408-970-7002 (W)
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** The opinions and facts contained in this message are entirely mine and do
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-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
On Behalf Of mkb
Sent: Friday, July 15, 2005 9:38 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Monitoring Interval Granularity (iostat)
I hope this is not too off-topic, but here goes.
I have a linux system (RH AS 3.0) running Oracle 9iR2.
I'm monitoring disk usage on our RAID arrays by executing iostat and
capturing the output to a file.
Eventually, I'd like to plot the data out and see how the disks are
performing.
I'm currently executing iostat every 5 minutes. How would one determine the
interval granularity? I guess it would depend on a lot of things.
So for example, if it's very busy take an iostat snapshot every 5 or 10
minutes, say. If it's lightly loaded, take a snapshot every minute perhaps?
Any thoughts?
--
mohammed
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