[mrtg] number of monitored routers is it related to MRTG stopping RRDB update?

Alex Koueik akoueik.c at stc.com.sa
Tue Sep 1 15:18:46 CEST 2009


We are currently monitoring 300 routers. Is there anyone monitoring a higher number of devices with MRTG RRDB?
Our problem is that MRTG server stops updating the RRDBs while the MRTG process is still running.
We tried het below:

1-      Stopped and restarted the MRTG processes, RDDBs are updated for a period and then stopped again.

2-      Increased the child processes (Forks) from 4 to 12 processes, RDDBs updated for a period and then stopped again.

3-      We installed a carbon copy of MRTG on another machine the problem occurred on both machines at different times.

4-      We debugged snmp on some of the routers during the outage, they were not receiving any snmp requests from MRTG.

5-    We are getting from messages log: "ERROR: I Quit! Another copy of mrtg seems to be running. Check /data/mrtg-2/cfg/mrtg.pid"

6-    In the MRTG debug we are getting the following :

"ERROR: Target[route1][_IN_] ' $target->[14]{$mode} ' did not eval into defined data"

"SNMPGET Problem for on community at xxx.xxx.xxx.xxx::::1:2:v4only
            at /data/mrtg-2/bin/mrtg line 2149

2009-09-01 00:13:47 -- --snpo: SNMPfound -- 'undef', 'undef'"

OS: Red Hat Enterprise Linux ES release 4 (Nahant) 3.4.3-9.EL4
MRTG: mrtg-2.15.1
RRDtool: rrdtool-1.2.19

Any pointers on where the problem is, is highly appreciated.

Best regards,

| Alex Koueik | L2 CF-NOC Engineer | STC | ext: +96614522647 | m: +966555211869 | www.stc.com.sa |

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