Re: RRD data collection irregularity

This is what I get back walking the OID .1.3.6.1.4.1.2021.16.2.1.5 directly:

UCD-SNMP-MIB::logMatchGlobalCounter.1 = Counter32: 3365
UCD-SNMP-MIB::logMatchGlobalCounter.2 = Counter32: 3232
UCD-SNMP-MIB::logMatchGlobalCounter.3 = Counter32: 132
UCD-SNMP-MIB::logMatchGlobalCounter.4 = Counter32: 459
UCD-SNMP-MIB::logMatchGlobalCounter.5 = Counter32: 1323
UCD-SNMP-MIB::logMatchGlobalCounter.6 = Counter32: 1445


Using gauge32 doesn't work as the value returned is increasing, and when I graph it, I just see an increasing line, rather than a line that reflects the change.

I'll try changing my graph to multiply by the time interval (300) to see if that fixes the scale of the graph.  Good to know that the stored value is divided by the time interval.  That is probably what is throwing out the values.

Regards,
John









From: Seibold, Michael [mailto:[email protected]]
Sent: Thursday, 20 September 2018 4:21 PM
To: General OpenNMS Discussion <[email protected]>
Subject: Re: [opennms-discuss] RRD data collection irregularity

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Hi John,


  1.  if you use Counter32 the measured values get divided by the time interval (in seconds) between the measurement points, so you should use Gauge or Gauge32 instead of Counter32 if you want to see those values directly, otherwise there will be rfTotalCalls/Second etc. in the rrd files.
  2.  I'm not sure about the output from collectd you provided - are you shure you are getting integer values back or might there are string values? You can check this using snmpwalk for the OID . 1.3.6.1.4.1.2021.16.2.1.5 directly.

For the ifmib output is like this:
IF-MIB::ifInUcastPkts.527696832 = Counter32: 270331006

-Michael

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