Bug 437017 - Satellite suffers from severe performance degradation during System Group changes
Satellite suffers from severe performance degradation during System Group cha...
Product: Red Hat Satellite 5
Classification: Red Hat
Component: Other (Show other bugs)
i386 Linux
low Severity medium
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Assigned To: Shannon Hughes
Brandon Perkins
Depends On:
  Show dependency treegraph
Reported: 2008-03-11 13:35 EDT by James Puellmann
Modified: 2009-05-28 16:08 EDT (History)
3 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2009-03-23 17:37:08 EDT
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Regression: ---
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Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
sar data captured during removal of one, and then two, hosts from a single System Group (1.03 MB, application/octet-stream)
2008-03-11 13:35 EDT, James Puellmann
no flags Details

  None (edit)
Description James Puellmann 2008-03-11 13:35:45 EDT
Description of problem:

Removing a host from a System Group via the RHN Satellite web interface
generates severely high loads and very high %iowait due to excessive disk
writes. Removal of a single host from a System Group takes 5 minutes. Removal of
N hosts takes 5N minutes.

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

RHN release 4.1.5

How reproducible:

Every time.

Steps to Reproduce:
1. Remove host from System Group
Actual results:

5 minutes of high load and %iowait while system writes copious amounts of data
to disk.

Expected results:

Low load, low disk usage, quick return time.

Additional info:

sar data is attached.
For reference, a single host was removed from the USWHWK6 System Group at
16:33:01. Time to completion: 5+ minutes. At 16:41:05, two hosts were removed
from the same System Group. Time to completion: 9+ minutes.

Note spike in loadavg, %iowait, block device IO during executions.
Comment 1 James Puellmann 2008-03-11 13:35:45 EDT
Created attachment 297647 [details]
sar data captured during removal of one, and then two, hosts from a single System Group
Comment 3 James Puellmann 2008-03-11 13:46:27 EDT
More info on this Satellite server:

1594 subscribed hosts - all with Management Entitlement. A couple (RHN Proxies)
with Provisioning.
193 System Groups
22 Software Channels, 10 of these are custom. the rest standard Red Hat channels.
Some of the custom channels are Clones. Some are not.
403 managed packages (uploaded via rhnpush).
No config channels defined.
Comment 4 James Puellmann 2008-03-11 14:10:41 EDT
Even more info on satellite server. I'm not sure if these numbers are high or
low or not:

[user@host ~]$ sudo find /data01/satellite/ -type f | wc -l
[user@host ~]$ sudo find /data01/satellite/ -type l | wc -l
[user@host ~]$ sudo find /data01/satellite/ -type d | wc -l
Comment 7 Clifford Perry 2009-03-23 14:35:42 EDT
Hi there, 
has there been a support request opened for this to track with? 
Right now there is no customer associated ticket aligned to this bug report, nor the initial investigation performed by our Support Engineering Group to gain replication and understanding of the bug being reported. 

Comment 9 Jon Stanley 2009-03-23 17:37:08 EDT
Hey Cliff - 

Not sure if there's been a case opened or not. Considering that the report is a year old at this point, we've upgraded to Sat 5.1, and I don't think we've seen this problem, it's fairly safe to close this BZ.


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