[rrd-users] mrtg / rrdtool update problem

Sat Aug 25 15:01:50 CEST 2007

Dear All,

I have a problem with MRTG/RRDTOOl not updating the AVERAGE field but only the MAX.

The target VCRLQ-3-7 his AVERAGE does not get updated because rrdtool returns NaN. It is stored in
the MAX field only.

So I can't properly graph my rrd files because if I use MAX instead of AVERAGE I get too high values
on week/month/year base.

As you can see from the debug output MRTG receives the information via SNMP and tries to update the
rrdfile. But it returns NaN and only the MAX field gets filled in.

I assume it's an rrdtool problem since MRTG receives the information and the error occours on
updating the rrdfile.

Any suggestions?

Regards,
Geert Hauawerts.
=============================================================

MRTG debug output:
==================

--base: Act on Router/Target vcrlq-3-7
--base: Get Current values: in:2967537080, out:3737279001, up:undef, name:undef, time:1187971201
--base: Create Graphics
--base: start RRDtool section
--base: maxi:12500000, maxo:12500000
--log: Called: RRDs::tune(/XXXX/vcrlq-3-7.rrd -a ds0:12500000 -a ds1:12500000 -d ds0:COUNTER -d
ds1:COUNTER)
--log: Calling: RRDs::update(/XXXX/vcrlq-3-7.rrd, '1187971201:2967537080:3737279001')
--log: Called: RRDs::info(/XXXX/vcrlq-3-7.rrd)
--log: Called: RRDs::fetch(/XXXX/vcrlq-3-7.rrd,'AVERAGE','-s',1187971200,'-e',1187971200)
--log:   got: NaN/NaN

mrtg.cfg:
==========

WorkDir: /XXXX
LogFormat: rrdtool

Target[8S4CQ-1-1]: #Fa0/16:XX at YY
MaxBytes[8S4CQ-1-1]: 12500000
Title[8S4CQ-1-1]: 8S4CQ-1-1

Target[VCRLQ-3-7]: #Fa0/9:XX at YY
MaxBytes[VCRLQ-3-7]: 12500000
Title[VCRLQ-3-7]: VCRLQ-3-7

Target[VCRLQ-3-5]: #Fa0/8:XX at YY
MaxBytes[VCRLQ-3-5]: 12500000
Title[VCRLQ-3-5]: VCRLQ-3-5

Target[VCRLQ-7-8]: #Fa0/3:XX at YY
MaxBytes[VCRLQ-7-8]: 12500000
Title[VCRLQ-7-8]: VCRLQ-7-8

generic debug output:
=====================

web1-m1  # rrdtool dump vcrlq-3-7.rrd | grep 2007-08-24 | grep NaN | wc -l
60
web1-m1  # rrdtool dump vcrlq-3-7.rrd | grep 2007-08-24 | grep NaN | head -n 5
            <!-- 2007-08-24 11:15:00 UTC / 1187954100 --> <row><v> NaN </v><v> NaN </v></row>
            <!-- 2007-08-24 11:20:00 UTC / 1187954400 --> <row><v> NaN </v><v> NaN </v></row>
            <!-- 2007-08-24 11:25:00 UTC / 1187954700 --> <row><v> NaN </v><v> NaN </v></row>
            <!-- 2007-08-24 11:30:00 UTC / 1187955000 --> <row><v> NaN </v><v> NaN </v></row>
            <!-- 2007-08-24 11:35:00 UTC / 1187955300 --> <row><v> NaN </v><v> NaN </v></row>
web1-m1  #

As you can see below it just stopped working. Even when I delete the rrdfile it will not work. (this
is in  <pdp_per_row> 1 </pdp_per_row> )

<!-- 2007-08-24 11:00:00 UTC / 1187953200 --> <row><v> 1.1394408093e+06 </v><v> 7.4955681567e+04
</v></row>
<!-- 2007-08-24 11:05:00 UTC / 1187953500 --> <row><v> 3.5354034556e+06 </v><v> 1.6853120614e+05
</v></row>
<!-- 2007-08-24 11:10:00 UTC / 1187953800 --> <row><v> 2.4640682202e+06 </v><v> 1.1496912463e+05
</v></row>
<!-- 2007-08-24 11:15:00 UTC / 1187954100 --> <row><v> NaN </v><v> NaN </v></row>
<!-- 2007-08-24 11:20:00 UTC / 1187954400 --> <row><v> NaN </v><v> NaN </v></row>
<!-- 2007-08-24 11:25:00 UTC / 1187954700 --> <row><v> NaN </v><v> NaN </v></row>
<!-- 2007-08-24 11:30:00 UTC / 1187955000 --> <row><v> NaN </v><v> NaN </v></row>
<!-- 2007-08-24 11:35:00 UTC / 1187955300 --> <row><v> NaN </v><v> NaN </v></row>
<!-- 2007-08-24 11:40:00 UTC / 1187955600 --> <row><v> NaN </v><v> NaN </v></row>

As you can see AVERAGE empty, MAX filled in.

web1-m1 /CCC/Storage/DI8ZF/RRD-IPServices # rrdtool dump vcrlq-3-7.rrd | grep "2007-08-24 11:35:00 UTC"
                         <!-- 2007-08-24 11:35:00 UTC / 1187955300 --> <row><v> NaN </v><v> NaN
</v></row>
                         <!-- 2007-08-24 11:35:00 UTC / 1187955300 --> <row><v> 2.5529396798e+06
</v><v> 1.5479542797e+05 </v></row>
web1-m1 /CCC/Storage/DI8ZF/RRD-IPServices #

web1-m1 ~ # uname -a
Linux web1-m1 2.6.20-16-generic #2 SMP Thu Jun 7 19:00:28 UTC 2007 x86_64 GNU/Linux
web1-m1 ~ # cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 67
model name      : Dual-Core AMD Opteron(tm) Processor 1214
stepping        : 2
cpu MHz         : 2211.366
cache size      : 1024 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush
mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy
svm cr8_legacy
bogomips        : 4426.31
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc

processor       : 1
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 67
model name      : Dual-Core AMD Opteron(tm) Processor 1214
stepping        : 2
cpu MHz         : 2211.366
cache size      : 1024 KB
physical id     : 0
siblings        : 2
core id         : 1
cpu cores       : 2
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush
mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy
svm cr8_legacy
bogomips        : 4423.05
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc

web1-m1 ~ # free -m
              total       used       free     shared    buffers     cached
Mem:          2012        245       1767          0          0        173
-/+ buffers/cache:         71       1941
Swap:         3812          0       3812
web1-m1 ~ #