Bug 223775
| Summary: | ssRawCpu* stays on 2^32-1 forever | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 4 | Reporter: | James Lamb <james.lamb> |
| Component: | net-snmp | Assignee: | Jan Safranek <jsafrane> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | medium | ||
| Version: | 4.4 | CC: | aholzhammer, billm, csm, joel.matuseski, tao |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | RHBA-2007-0738 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2007-11-15 16:00:21 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Can we fix it for 4.6? *** Bug 204089 has been marked as a duplicate of this bug. *** This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release. *** Bug 240598 has been marked as a duplicate of this bug. *** *** Bug 261601 has been marked as a duplicate of this bug. *** An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2007-0738.html *** Bug 363681 has been marked as a duplicate of this bug. *** |
Description of problem: When I query a RH ES v4 u4 server using snmp for idle ticks which should indicate that the server is loaded or not. After a large amount of uptime (circa 100days) the servers all report the idle ticks not increasing even though the server has been idle for some time. If I run the following command awk '/^cpu / {print $5}' /proc/stat I can see that the counter is still incrementing but snmpd reports UCD-SNMP-MIB::ssCpuRawIdle.0 = Counter32: 4294967295 When I query with the following OID enterprises.ucdavis.systemStats No matter how long the system is up it will always report the variable 4294967295, even if the system is 100% idle. I have done some extensive research and it looks as though the problem is resolved with the following patch from the net-snmp cvs. http://net-snmp.cvs.sourceforge.net/net-snmp/net-snmp/agent/mibgroup/ucd-snmp/vmstat.c?r1=5.7&r2=5.8 Version-Release number of selected component (if applicable): How reproducible: Very Easy. Steps to Reproduce: 1. snmpwalk -v 2c -c private localhost enterprises.ucdavis.systemStats | grep Idle ; sleep 60 ; snmpwalk -v 2c -c private localhost enterprises.ucdavis.systemStats | grep Idle Actual results: UCD-SNMP-MIB::ssCpuIdle.0 = INTEGER: 99 UCD-SNMP-MIB::ssCpuRawIdle.0 = Counter32: 4294967295 Expected results: UCD-SNMP-MIB::ssCpuIdle.0 = INTEGER: 99 UCD-SNMP-MIB::ssCpuRawIdle.0 = Counter32: [[4294967295]] Where the [[]] Number should have incremented as the server is idle. Additional info: This problem appears to occur in all Redhat EL v3 and v4 servers that we have with huge uptime. After reading around on the internet I have found several people with an identical issue. From what It looks like this is the patch to resolve the problem. http://net-snmp.cvs.sourceforge.net/net-snmp/net-snmp/agent/mibgroup/ucd-snmp/vmstat.c?r1=5.7&r2=5.8&diff_format=c There are also debian users with similar problems. http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=308018 I have previously reported this problem on bugzilla #202044 for EL3. The problem appears to show up much sooner on our EL4 servers