Glance Plus Disk 100%

[ôíî¦ ÅçêO]

I received that GlancePlus is disk Usage
100%.

if you heard that this phenomenon is corecct.
or not.

this report is where I can get.

[Brian M. Fisher]

It is not at all uncommon for the disk usage to be 100% for a heavily used machine. If this is causing a performance problem you might need to investigate shifting data to other disks.

Brian
<*(((>< er

[randy lee]

Look at the request queue value. If it is consistently high ( gt 4) than you need to look at shifting the workload. Depending what other hardware you are using, (EMC,etc)
there are other solutions.

[Jim Welch]

Can you supply more information? Did you get an alert on the screen? If so, what is the exact text of the message? If you are looking at a number in glance (as opposed to gpm), which screen are you looking at? You can identify a metric on the screens by hitting the 'h' key for help, then selecting "Current Screen Metrics", then scrolling down to the title that corrosponds to the number and hitting return. Then you will get the formal metric name and a description. If you are seeing an alert from glance, you can look at the /var/opt/perf/adviser.syntax file and see what metrics and values trigger that alert and take the appropriate action. (metric definations are also in /opt/perf/paperdocs/gp/C/metrics.pdf)

[ôíî¦ ÅçêO]

This is my work.
I want hint to solve the problem.

Thank you.

[Steven Sauve]

I had the same "problem". During certain points in the day our Disk IO in Glance would hit 100%. I wrote a script that tracks IO throughout the day using sar and then formats the reports a bit. I'll attach it here. You'll need to edit the two lines that refer to directories. Also towards the bottem it seperates out our most used disks, you can either change the devs it calls for or take that part out. Either way dump it into a spreadsheet and you can track your IO throughout the day.
It turns out ours was under 20% for even our most active disks except at noon when IO would spike. The culprit turned out to be Omniback running an automatic database purge which we moved.
Hope this helps.
Steve

[Jim Welch]

HINTS:
BYDSK_UTIL
BYDSK_REQUEST_QUEUE
GBL_DISK_UTIL
GBL_DISK_UTIL_PEAK
GBL_DISK_SYBSYSTEM_QUEUE
/var/opt/perf/adviser.syntax
$HOME/.gpm*
sar -d

[Dave Wherry · Accepted solution]

Are you working in the character version of Glance or the GUI (gpm)?
If you are using the character version and you are talking about the Disk Util bar at the top of the screen it may be nothing to worry about. That bar shows the most active disk during the last sample interval. It is not system disk usage.
You need to drill down and see which disk is so busy. Type u to get to the IO By Disk screen. Here you can see if it is the same disk that is constantly busy or if the activity moves around. If it is moving around it is probably not a problem. If it is staying on one disk all of the time you need to distribute your data a little better.
In glance type ? and you will see a list of the different screens you can use to drill down for more information.
One other post listed some metrics you can look at - GLB_.....
Those are PerfView metrics and you will need PerfView to make any sense of them.

[ôíî¦ ÅçêO]

I want to pay, but I can't.

Thank you.

[Alan Riggs]

One note -- it is not necesary to purchase perfview to look at measurewear data. the extract command works just fine for generating customized ascii reports, and it even has a "guided" mode for a user unfamiliar with the command syntax.