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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 OSF1
pmgrd
pmgrd(8) System Manager's Manual pmgrd(8) NAME
pmgrd - The Performance Manager metrics server daemon SYNOPSIS
/usr/sbin/pmgrd DESCRIPTION
The Performance Manager (PM) metrics server (pmgrd) is a UNIX daemon process that provides general UNIX performance metrics on request. The pmgrd metrics server supports the extensible SNMP agent mechanism (eSNMP). The pmgrd metrics server is a subagent that runs by default whenever the SNMP agent is started. The pmgrd metrics server also listens for SNMP requests on a private UDP port. The private port accepts SNMPv1 requests, and supports the SNMPv2 GET-BULK request for efficient bulk data transfer (using noAuth/noPriv security). The pmgr and getbulk programs require this capa- bility. The MIB (management information base) variables implemented by the pmgrd metrics server are described at this location: /usr/share/sys- man/mibs/pm.mib. The getone, getmany, getbulk, and gettab UNIX commands issue SNMP requests. You can use these commands to communicate directly with the pmgrd metrics server if you set the environment variable PMGR_SNMP_PORT. FILES
The metrics server daemon. The MIB file for the pmgrd daemon. messages generated by the pmgrd are logged to this file. SEE ALSO
Commands: getone(1), getmany(1), getbulk(1), and gettab(1). Performance Manager User's Guide pmgrd(8)