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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 DEBIAN
xsysinfo
XSYSINFO(1x) Debian GNU/Linux XSYSINFO(1x) NAME
xsysinfo - Display Linux kernel parameters in graphical form SYNOPSIS
xsysinfo [-help] [-update n] [-[no]title] [-[no]labels] [-[no]loadavg] [-[no]load] [-[no]mem] [-[no]swap] [-[no]smp] DESCRIPTION
Xsysinfo is an X application to display some Linux kernel parameters in graphical form. It is like a mix of top, free and xload with the difference that the values are shown in form of a horizontal bar. The displayed values are: CPU load average, CPU load, memory and swap sizes (details see below). OPTIONS
-update n Set update rate to n milli-seconds -title Show title string -notitle Don't show title string -labels Show gauge labels -nolabels Don't show gauge labels -loadavg Show CPU load average value -noloadavg Don't show CPU load average value -load Show CPU load value -noload Don't show CPU load value -smp Show separate SMP loads -nosmp Don't show separate SMP loads. -mem Show memory info -nomem Don't show memory info -swap Show swap info -noswap Don't show swap info -help Display options DISPLAY
Xsysinfo display the following values: CPU load average CPU load average between 0.000-8.000. The gauge's bar is subdivided into segments, where one segment represents a load value of 1.0. The bar's full length is automatically scaled, depending on the displayed value. CPU load percentage CPU load time to CPU idle time subdivided in three segments: user load, system load and nice load. On an SMP system the -smp option replaces the single total load meter with a separate meter for each processor. Memory The memory gauge's bar is subdivided into two segments with the amount of physical memory, which is used by processes on the left and physical memory used for the page and buffer cache on the right. The length of the whole bar, which is the sum of these two val- ues, shows the amount of physical memory currently used by the system. Swap The percentage of swap space used by the system to total amount of swap space. AUTHORS
Xsyinfo is written by Gabor Herr <herr@iti.informatik.th-darmstadt.de> and currently maintained by Ronald Wahl <ronald.wahl@informatik.tu- chemnitz.de>. This manual page was created by Roland Rosenfeld <roland@spinnaker.de> for the Debian GNU/Linux system (but may be used by others). Debian Project December 2005 XSYSINFO(1x)