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SNMP responses failing under high system load
Post 302570476 by Karunamon on Thursday 3rd of November 2011 11:39:33 AM
11-03-2011
SNMP responses failing under high system load
Greetings,
I've got a Zenoss v2.5 server monitoring a large video encoding farm. Needless to say, these systems are under high bandwidth and CPU utilization the majority of the time.
What I'm running into is that, occasionally, these systems will fail to respond to a standard SNMP request, thereby throwing "SNMP agent down" errors in Zenoss, and generating lots of otherwise unnecessary alerts. Then, the next time the system is polled, it works, and a clear message is also sent (generating even more alerts).
Short of nice-ing the snmpd process down so that it doesn't get completely blocked by the video encoding, what would be the best way to handle this, either via configuring Zenoss, SNMP, or the servers themselves? I don't see an obvious solution to this puzzle..
I've got a Zenoss v2.5 server monitoring a large video encoding farm. Needless to say, these systems are under high bandwidth and CPU utilization the majority of the time.
What I'm running into is that, occasionally, these systems will fail to respond to a standard SNMP request, thereby throwing "SNMP agent down" errors in Zenoss, and generating lots of otherwise unnecessary alerts. Then, the next time the system is polled, it works, and a clear message is also sent (generating even more alerts).
Short of nice-ing the snmpd process down so that it doesn't get completely blocked by the video encoding, what would be the best way to handle this, either via configuring Zenoss, SNMP, or the servers themselves? I don't see an obvious solution to this puzzle..
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LEARN ABOUT CENTOS
pmdasnmp
PMDASNMP(1) Performance Co-Pilot PMDASNMP(1) NAME
pmdasnmp - Gateway from SNMP to PCP (PMDA) DESCRIPTION
pmdasnmp is a Performance Metrics Domain Agent (PMDA) which provides a generic gateway from PCP queries from a PCP client to SNMP queries to one or more SNMP agents. INSTALLATION
If you want access to the SNMP gateway performance metrics, do the following as root: # cd $PCP_PMDAS_DIR/snmp # ./Install If you want to undo the installation, do the following as root: # cd $PCP_PMDAS_DIR/snmp # ./Remove pmdasnmp is launched by pmcd(1) and should never be executed directly. The Install and Remove scripts notify pmcd(1) when the agent is installed or removed. CONFIGURATION
TODO: define config file format here - map/set/host/... etc FILES
$PCP_PMDAS_DIR/snmp/snmp.conf optional configuration file for pmdasnmp $PCP_PMDAS_DIR/snmp/Install installation script for the pmdasnmp agent $PCP_PMDAS_DIR/snmp/Remove undo installation script for the pmdasnmp agent $PCP_LOG_DIR/pmcd/snmp.log default log file for error and warn() messages from pmdasnmp SEE ALSO
pmcd(1) and SNMP 3.8.10 Performance Co-Pilot PMDASNMP(1)