Bug 680264

Summary: performance problems with net-snmp-5.1.2-20.el4.i386
Product: Red Hat Enterprise Linux 4 Reporter: Fred New <fred.new2911>
Component: net-snmpAssignee: Jan Safranek <jsafrane>
Status: CLOSED CANTFIX QA Contact: BaseOS QE Security Team <qe-baseos-security>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 4.9   
Target Milestone: rc   
Target Release: ---   
Hardware: i686   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2012-05-21 13:27:44 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Attachments:
Description Flags
Cacti graph: memory utilization
none
Cacti graph: eth0 traffic none

Description Fred New 2011-02-24 20:39:41 UTC 
Description of problem:
After updating to net-snmp-5.1.2-20.el4.i386, Nagios frequently complained (4-10 times per day) that my system was unreachable and Cacti graphs showed a lot of gaps.  Nagios and Cacti reporting returned to normal after downgrading to net-snmp-5.1.2-20.el4.i386

Version-Release number of selected component (if applicable):
net-snmp-5.1.2-20.el4.i386

How reproducible:
This is an intermittent problem after upgrading to net-snmp-5.1.2-20.el4.i386.


Steps to Reproduce:
1. Upgrade to net-snmp-5.1.2-20.el4.i386.
2. Attempt to monitor the system using Nagios or Cacti.
3.
  
Actual results:
Nagios 2.12 will occasionally report that the system is in an "unknown" state.  Cacti graphs will show gaps where no response was received from snmpd.

Expected results:
No complaints from Nagios; no gaps in Cacti graphs.

Additional info:
kernel-2.6.9-100.EL.i686
cpuinfo - Intel(R) Pentium(R) III CPU family      1133MHz
lspci - Ethernet controller: Intel Corporation 82557/8/9/0/1 Ethernet Pro 100 (rev 0d)
NIC driver - e100
SELinux status - enabled, permissive
The load on this system as reported by uptime (and Cacti) is normally less than 0.2; it might exceed 1 briefly once or twice daily, like during backups.
Comment 1 Fred New 2011-02-25 15:40:52 UTC 
Created attachment 481020 [details]
Cacti graph: memory utilization

The latest packages, net-snmp-5.1.2-20.el4.i386 and net-snmp-libs-5.1.2-20.el4.i386, were in place from 18-23 February.  The downgraded packages have been in place since 23 February and you can see a considerable improvement.
Comment 2 Fred New 2011-02-25 15:47:42 UTC 
Created attachment 481023 [details]
Cacti graph: eth0 traffic

This graph shows that network traffic was very light.  The peaks were caused by backups.  The load average graph is also light during the same period.
Comment 3 Jan Safranek 2012-05-21 13:27:44 UTC 
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RHEL4 is in fairly late stage and only critical bugs are fixed.