Disk Utilization for 0 C: D: E: is 99.61%, crossed warning (80) or critical

Hi,
I have windows 2008 R2 64 bit OS and database version is 11.1.0.7.0 64 bit ...
I got the below error via EM.
Target Name=ORSDEV.xxxdomain.com
Target Type=Host
Host=ORSDEV.xxxdomain.com
Metric=Disk Device Busy (%)
Metric Value=99.61
Disk Device=0 C: D: E:
Timestamp=Mar 21, 2012 7:41:58 PM SGT
Severity=Critical
Message=Disk Utilization for 0 C: D: E: is 99.61%, crossed warning (80) or critical (95) threshold.
Notification Rule Name=Host Availability and Critical States
Notification Rule Owner=SYSMAN
Notification Count=1
1.Can any one tell how to trace this warning and where to check for this alert ?
2.what is the meaning of Disk Utilization for 0 ?
3.How to identify the problem and resolve the issue in this case ?
Thanks & Regards,
Vikash (Junior DBA)

Hi Vikash,
This "Disk Utilization" metric actually points to hos busy is the disk device (in percentage) and not a percentage of disk capacity. As a matter of fact, in the 11.1. Database Control, it has been renamed to "Disk Device Busy(%)".
Regarding of the meaning of a disk busy, it is the percentage of time the physical disk is active. And it may no be a problem, as you can see at http://sunsite.uakom.sk/sunworldonline/swol-08-1999/swol-08-perf.html : "Complex systems can be 100 percent busy, but still have a lot of spare capacity".
On the other hand, to check how "full" a Disk is, the metric 'Filesystem Space Available (%)' can be used. This metric represents the percentage of free space available in the file system. Also, the Filesystem Size (MB) checks the total space (in megabytes) allocated in the file system.
Hope this helps.
Thanks,
Cris

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Name=scwweo01.mydomain.com
Type=Host
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Is this referring to IO on the disk or free space (which would be way wrong as its 63% free). If it is IO, is there something I should be doing to minimise it?
Thanks

This is a HOST metric.(Type = Host)
To find your answer, you would go to the Enterprise Manager documentation at http://download-east.oracle.com/docs/cd/B16240_01/doc/nav/portal_booklist.htm to find the "Enterprise Manager Framework, Host, and Third-Party Metric Reference Manual" in the lower right column.
Once you have the document you would search for Disk Utilization to determine the rule being used.
In THIS case, however, you would also want to refer to Metalink, specifically note 303788.1 - where we find that
1) The metric is actually "Disk Device Busy (%)" in the above doc, (so searching for Disk Utilization' does not work) and
2) Per Microsoft KB article Q310067, there is an error in the number Oracle uses.

EM Alert: Critical: server - Disk Utilization for 1 D: is 99.8

hello!
in the last day's i receive the following error message every 2 or 3 hours:
Name=server
Typ=Host
Host=server
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Disk Device=1 D:
Zeitstempel=12.04.2010 12:29 Uhr CEST
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Hi,
I have a 10.2.0.1 instance on Windows XP. EM frequently reports disk problems that don't exist. Example below. The disk is no where near 100% so I don't know where EM is getting this. Has anyone else had this problem? Is this a bug?
ex.
Name=op1t1tsr
Type=Host
Host=op1t1tsr
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One twist however, is that my windows roving profile attenpts to map E to another location. On this machine this does not happen since there is a local E driver but I wonder if the EM agent is somehow confused by this. In the Windows explorer the E drive actually displays the mapped location name, but when you drill down you see the local drive.

How does GC calculate the Disk Utilization metric.

Hi,
I am getting the following error:
Name=NT000786.oak.zone1.progress-energy.com
Type=Host
Host=NT000786.oak.zone1.progress-energy.com
Metric=Disk Utilization (%)
Disk Device=3 F:
Timestamp=Dec 20, 2005 12:26:11 PM EST
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Rule Owner=SYSMAN
This is a 410 GB disc with 266 GB used. The oracle datafile only use 7 GB on this disc; the rest is for Symantic backup!

Check the Notification Rule setting of Disk Utilization (%) in Preferences -> Notification -> Rules. Select Host Availability and Critical States to View or Edit.
There may be a situation where OEM may not understand the disk space while checking available space.
See this post and response
Re: Data Guard Bug, which patch to fix?

Enterprise manager alert on disk utilization

hello..
i was wondering if you guys here know what the "3" means?
Disk utilization for 3 F is 90%, crossed warning (80) or cristical (95) threshold.
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thanks,
peacock

Well, there is more than services to run Oracle on Windows. To do administrative works using EM, the user must be configured in the group, "logon as batch job" . But neither home or home premium has the option to manage groups. Additionally, as Ed mentioned, oracle never supported any of its products over any "home" edition of the o/s so using it for Oracle would be surely causing issues which in general would be bizarre only.
Aman....

Grid Control showing excessive amount of disk utilization.

Hi Folks,
I understand that Oracle doesn't support their products 100% on non Oracle VMs, but I thought I might take a stab at it.
I decided to stick with a simple installation of Oracle Grid Control running on a Windows 2003 R2 32 bit os, here are the steps I took.
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Metric               Disk Device Busy (%)
Disk Device               0 C:
Severity               Critical
Alert Triggered          Jun 3, 2009 7:57:54 PM
Last Updated          Jun 4, 2009 3:48:48 PM
Acknowledged          No
Acknowledged By     n/a
Message               Disk Utilization for 0 C: is 587.86%, crossed warning (80) or critical (95) threshold.
More info:
- Guest is running on a Dual Quad Core Xeon System with 16 GB of RAM
- Guest has dedicated 4096MB of ram
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- Windows 2008 Hyper-V host disk array is in a RAID 5 configuration running 10k SAS drives
- Windows 2008 Hyper-V host utilization is literary at most 5% (current is 1%)
- Windows 2008 Hyper-V disk utilization according to graphs is showing 100KB/s usage (less than 1%)
Temporary solution is to turn off the metric, but not sure if that's such a good idea.
- Note that 11g EM and 10g EM running on Hyper-V server had the same issue.
- Note that 11g EM and 10g EM running without visualization had no issues.
Any thoughts?

It may be related to Bug 8677212: BACKUP INFORMATION FOR SOME DATABASES SHOWS INCORRECTLY
Although bug info says it for HP-UX, I've also seen the same problem on Grid Control 10.2.0.5 running on Solaris.
You may want to apply 10.2.0.5.4 Grid Control Patch Set Update (PSU) [ID 1139563.1] to fix it.
Best Regards,
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If this question is answered, please mark appropriate posts as correct/helpful and the thread as closed. Thanks

Disk Utilization Warning

I am getting Disk Utilization warning;
"Disk Utilization for 0 C: D: is 98.9 %"
Please help in getting what is this and how to resolve it?
Thanks,
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Get some more disk and move some of your datafiles to the new disk.
or
See if you have unnecessary archived redo log files. If so, get rid of those that are older than the oldest backup you keep.
or
See if your audit files, trace files, or alert log are taking up too much space. If so, move them elsewhere or delete them.
or
See if you are accumulating data load files that you can get rid of.
or
See if you are accumulating user reports generated by your application system that you can get rid of.
Basically, you have two choices.
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Can a disk utilization be more than 100% as shown from alert notification?

Hello,
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Known Issue:
Disk Utilization/Disk Device Busy Metrics Displaying Values Above 100% on Windows, Generating Critical Alerts
https://metalink2.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=303788.1
DISK UTILIZATION METRIC FALSELY TRIGGERS ON WINDOWS
https://metalink2.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=382802.1

Root cause for 100 % disk utilization

Hi All,
Whenever in one of the dailog instance disk utilization is showing 100% sap system is getting very slow,what is the root cause for 100% utilization .At that moment of time when I checked the CPU usage it showed 98% CPU idle. server is on Windows NT and around 13GB of RAM is always free.
We have only one drive in the apps server.Can this be the cause of 100% disk utilization?
Waiting for ur frequent responses.
Regards,
Prashant

Hi,
I have answered similar questions :
[Re: Disk Utilization 100%]
as described above, one thing that cause 100% disk utilization is that writer processes (and read process too) is concentrated only on a single disk (equivalent to single volume group or single logical volume).
we can imagine that a large number of user hitting the single disk (where datafiles exist) on the same time with a huge transaction load.
if we can manage writable datafiles in several locations (equivalent to several volume groups or several logical volumes) where several datafiles exist, writer processes (and read process too) will be distributed to that several locations, so that each location (each disk, each VG or each LV) utilization may not reach 100%.
so it is important to design writable datafiles in multiple location in different disks to prevent 100% disk utilization.
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hope it help you.
rgds,
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http://www.microsoft.com/en-us/download/details.aspx?id=30652
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Click Start
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Windows 8.1 running extremely slow with high disk utilization

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Try these steps.
Open task manager
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Find the ones which is consuming maximum memory
Uninstall if you don’t need the program or app. Re-configure or re-install the software or app if it is an important one.
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High disk utilization every 24 hours

Hi all,
While troubleshooting an user's complain about slow access to his mailbox on a Windows 2012/Exchange 2013 environment, I came across this interesting behavior:
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Diego de Azevedo IT Analyst - MCSE, MCITP

Good Call. I just spent the last few hours going over 550,000 events.
I reviewed the application log for a 24 hour period and here is what I noticed:
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TopN Words
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SharePoint Signal Store
Search Index Repair Time Based
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Service MSExchangeMailboxAssistants. TopN Words Assistant for database *** is entering a work cycle. There are *** mailboxes on this database.
Service MSExchangeMailboxAssistants. Store DS Maintenance Assistant for database *** is entering a work cycle. There are *** mailboxes on this database.
Service MSExchangeMailboxAssistants. Sharing Policy Assistant. for database *** is entering a work cycle. There are *** mailboxes on this database.
Service MSExchangeMailboxAssistants. SharePoint Signal Store Assistant for database *** is entering a work cycle. There are *** mailboxes on this
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Service MSExchangeMailboxAssistants. Search Index Repair Time Based Assistant for database *** is entering a work cycle. There are *** mailboxes on this database.
Service MSExchangeMailboxAssistants. People-centric triage for database *** is entering a work cycle. There are *** mailboxes on this database.
Service MSExchangeMailboxAssistants. People Relevance Assistant for database *** is entering a work cycle. There are *** mailboxes on this database.
Service MSExchangeMailboxAssistants. Managed Folder Mailbox Assistant for database *** is entering a work cycle. There are *** mailboxes on this database.
Service MSExchangeMailboxAssistants. Mailbox Processor Assistant for database *** is entering a work cycle. There are *** mailboxes on this database.
Service MSExchangeMailboxAssistants. Mailbox Association Replication Assistant for database *** is entering a work cycle. There are *** mailboxes
on this database.
Service MSExchangeMailboxAssistants. Calendar Repair Assistant for database *** is entering a work cycle. There are *** mailboxes on this database.
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It appears the purge of orphaned mailboxes happens only at this time as well .
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Calendar Sync
Junk Email Options
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Store Maintenance
Examples of the Event ID 9017
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Service MSExchangeMailboxAssistants. Junk Email Options Assistant for database *** is entering a work cycle. There are *** mailboxes on this database.
Service MSExchangeMailboxAssistants. Probe Time Based Assistant for database *** is entering a work cycle. There are *** mailboxes on this database.
Service MSExchangeMailboxAssistants. Store Maintenance Assistant for database *** is entering a work cycle. There are *** mailboxes on this database.
So how do I get the first group of maintenance tasks to run throughout the day, or at different times, or at least not all at the same time for all 15 databases?
Thanks!!
Well, its all workload based, so I don't think you can readily adjust that.
I'm more inclined to look at the specs of the mailbox servers. Are they up to the task and have they been vetted with the Mailbox Calculator?
Twitter!: Please Note: My Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

Investigating disk utilization issue with performance monitor

Hello
im using windows 2008r2 server, lately the server became very slow.
i ran performance monitor with the "avg disk queue length" counter and it seems that is very high, how can i tell exactly wich process is consuming all the disk utilization?
Thanks!
Guy

Hi,
Thanks for your post.
Please refer to this article about hunting down hard disk resource hogs
http://www.techrepublic.com/article/how-to-hunt-down-hard-disk-resource-hogs/
Regards.
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

Top 10 Disk Utilization Report

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Hi,
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reference.
Setup a Disk Report in SCOM 2012
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Disk Utilization for 0 C: D: E: is 99.61%, crossed warning (80) or critical

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