Bug 125857

Summary: Disk Utilization Spike right after each update
Product: Red Hat Enterprise Linux 3 Reporter: Gary Feng <gary_q_feng>
Component: kernelAssignee: Doug Ledford <dledford>
Status: CLOSED NOTABUG QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 3.0CC: petrides, riel, shillman
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2005-10-17 17:47:04 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---
Description Flags
Attachment 1, Disk Utilization (%): Disk Device hda of 7 days
Attachment 2, Disk Utilization (%): Disk Device hda of last 31 days none

Description Gary Feng 2004-06-12 13:30:46 UTC
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET 
CLR 1.1.4322)

Description of problem:
Disk Utilization %util spikes up to 100% right after upgraded the 
kernel from 2.4.21-9.0.3.EL to 2.4.21-15.EL. The high %util last 
about 12 hours and then goes down 10% and then spikes up to 45% after 
another 12 hours (see attachement 1).

In fact the same behavior happened for the update of
from 2.4.21-9.0.1.EL to 2.4.21-9.0.3.EL. (see attachment 2 [details]).

I only see this heppens on ATA DISK drives not on SCSI Disk drives.

Any ideas?

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.update the kernel with the release of 2.4.21-15.EL

Additional info:

Comment 1 Gary Feng 2004-06-12 13:34:56 UTC
Created attachment 101082 [details]
Attachment 1 [details], Disk Utilization (%): Disk Device hda of 7 days

The chart of disk utilization(%)

Comment 2 Gary Feng 2004-06-12 13:36:27 UTC
Created attachment 101083 [details]
Attachment 2 [details], Disk Utilization (%): Disk Device hda of last 31 days

Comment 3 Suzanne Hillman 2004-06-14 15:45:25 UTC
This looks to be something for which you might be best off going
through support, as Bugzilla is not an avenue for technical
assistance, but simply a bug tracking system.

To do this, you will need to log into https://www.redhat.com/apps/support/

Comment 4 Ernie Petrides 2004-06-14 22:42:30 UTC
Hi, Gary.  I concur with Suzanne on this one, especially since
the issue might be related to something different installed with
the update that is outside of the kernel.  Support is in the best
position to help you.

In the meantime, I'll reassign this to a kernel engineer who knows
about our disk susbsystems.  But please let us know what answers
you get back from Customer Support.

Thanks.  -ernie

Comment 5 Doug Ledford 2005-02-18 10:20:32 UTC
My guess is that this isn't a bug, but is a side effect of the prelink
option we use on current systems.  After a large number of RPMs are
updated on disk, the system needs to redo the prelink cycle.  This
cycle would be disk intensive.  It may be something else, but this is
my first guess at the what's going on.

Comment 6 Doug Ledford 2005-10-17 17:47:04 UTC
No activity for over 6 months, closing.