Problem Where Nothing Will Plot On Graph

h1d3m3 · Post by **h1d3m3** » Wed Mar 04, 2009 10:40 am

I've been using cacti for a while and I thought I had a good handle on the ins and outs of graphing, but this is stumping me.

Trying to graph an item that comes from net-snmp exec script. Here is the output:

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# snmpwalk -v 1 -c public localhost .1.3.6.1.4.1.2021.59
UCD-SNMP-MIB::ucdavis.59.1.1 = INTEGER: 1
UCD-SNMP-MIB::ucdavis.59.2.1 = STRING: "gc-YGCT"
UCD-SNMP-MIB::ucdavis.59.3.1 = STRING: "/usr/bin/perl /opt/snmpd-scripts/monitor_gc.pl YGCT"
UCD-SNMP-MIB::ucdavis.59.100.1 = INTEGER: 0
UCD-SNMP-MIB::ucdavis.59.101.1 = STRING: "6.862"
UCD-SNMP-MIB::ucdavis.59.102.1 = INTEGER: 0
UCD-SNMP-MIB::ucdavis.59.103.1 = ""

so the OID is .1.3.6.1.4.1.2021.59.101.1

On the cacti system, spine seems to be loading the data fine:

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03/04/2009 10:30:04 AM - SPINE: Poller[0] Host[2] DS[909] SNMP: v2: 10.1.6.27, dsname: netsnmp_j_ygct, oid: .1.3.6.1.4.1.2021.59.101.1, value: 6.862

But no matter what I try for the data template (I have tried derive, gauge and counter...I think I want derive) or for graph template (line3 - average or last), the graph always comes up with NaN for values and plots nothing.

Any pointers appreciated. The value is the total time taken for a Java young gen GC (i.e. 6.862 seconds) if that matters. (I'm running Version 0.8.7b)

Post by **TheWitness** » Fri Mar 06, 2009 8:28 am

Well, it's a Guage and you have to delete the RRDfile any time you change a DS Type (aka Delete and Recreate the Graph).

TheWitness

h1d3m3 · Post by **h1d3m3** » Fri Mar 06, 2009 10:20 am

TheWitness wrote:Well, it's a Guage and you have to delete the RRDfile any time you change a DS Type (aka Delete and Recreate the Graph).

TheWitness

I wish it was that simple, I tried that. I am at the point now where even the graph does not appear. I have checked the logs for errors, but there is nothing significant that I can see. It appears that it should be working (i.e. spine looks good, the rrd is there, the data seems to be hitting the rrd....but at the end of the day the graph does not even appear (or previously, it was all NaNs)

the logs again:

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03/06/2009 10:14:02 AM - SPINE: Poller[0] Host[2] DS[911] SNMP: v2: 10.1.6.27, dsname: snmp_j_ygct, oid: .1.3.6.1.4.1.2021.59.101.1, value: 10.248
03/06/2009 10:09:03 AM - SPINE: Poller[0] Host[2] DS[911] SNMP: v2: 10.1.6.27, dsname: snmp_j_ygct, oid: .1.3.6.1.4.1.2021.59.101.1, value: 10.248
03/06/2009 10:04:03 AM - SPINE: Poller[0] Host[2] DS[911] SNMP: v2: 10.1.6.27, dsname: snmp_j_ygct, oid: .1.3.6.1.4.1.2021.59.101.1, value: 10.064

I am attaching the current rrd and the exported template in hopes that there is something obviously wrong with it.

(side note : I did have to adjust the SNMP Timeout to 2000 for this host so the snmp exec had enough time to work.)

Thanks for the help.

Post by **TheWitness** » Fri Mar 06, 2009 1:17 pm

Your going to have to dump it.

TheWitness

h1d3m3 · Post by **h1d3m3** » Fri Mar 06, 2009 2:40 pm

TheWitness wrote:Your going to have to dump it.

TheWitness

Do you mean rrdtool dump?

I cant attach, getting : "Sorry, but the maximum filesize for all Attachments is reached. Please contact the Board Administrator if you have questions" but the zipped dump file is only 37k though

Post by **TheWitness** » Fri Mar 06, 2009 2:45 pm

Delete your other attachments or e-mail to me.

TheWitness

h1d3m3 · Post by **h1d3m3** » Fri Mar 06, 2009 3:07 pm

TheWitness wrote:Delete your other attachments or e-mail to me.

TheWitness

Added.

Post by **TheWitness** » Fri Mar 06, 2009 4:06 pm

According to your RRDfile, you are actually getting data. Here is a snippet from the file:

<row><v> 1.0064000000e+01 </v></row>
 <row><v> 1.0064000000e+01 </v></row>
 <row><v> 1.0100186667e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0248000000e+01 </v></row>
 <row><v> 1.0298936667e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0507000000e+01 </v></row>
 <row><v> 1.0514866667e+01 </v></row>
 <row><v> 1.0547000000e+01 </v></row>
 <row><v> 1.0547000000e+01 </v></row>
 <row><v> 1.0547000000e+01 </v></row>
 <row><v> 1.0547000000e+01 </v></row>
 <row><v> 1.0547000000e+01 </v></row>
 <row><v> 1.0547000000e+01 </v></row>
 <row><v> 1.0547000000e+01 </v></row>

So, your problem lies somewhere else.

TheWitness

h1d3m3 · Post by **h1d3m3** » Fri Mar 06, 2009 4:58 pm

Ok. So the data is there, but the graph does not display in any browser I try (ie, firefox, safari).

The HTML for the page says:

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<td align="center" class="textInfo" colspan="2">
<img src="graph_image.php?action=edit&local_graph_id=457&rra_id=1" alt="">
</td>

So I tried : http://10.1.6.60/cacti/graph_image.php? ... 7&rra_id=1 and I get "The image “http://10.1.6.60/cacti/graph_image.php? ... 7&rra_id=1” cannot be displayed, because it contains errors." Is this a reasonable thing to do? The http logs say:

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[client 172.16.1.111] PHP Fatal error:  Allowed memory size of 8388608 bytes exhausted (tried to allocate 23040 bytes) in /var/www/cacti/lib/data_query.php on line 607, referer: http://10.1.6.60/cacti/graphs.php?action=graph_edit&id=457
Allowed memory size of 8388608 bytes exhausted (tried to allocate 128 bytes)
[client 172.16.1.111] PHP Fatal error:  Allowed memory size of 8388608 bytes exhausted (tried to allocate 1000001 bytes) in /var/www/cacti/lib/rrd.php on line 129, referer: http://10.1.6.60/cacti/graphs.php?action=graph_edit&id=457
ERROR: the RRD does not contain an RRA matching the chosen CF

h1d3m3 · Post by **h1d3m3** » Fri Mar 06, 2009 5:08 pm

well, I finally got my graph. I changed the graph template to use Average instead of Last (per a few forum suggestions) and the graph suddenly appears now.

very odd.

Post by **TheWitness** » Fri Mar 06, 2009 5:39 pm

Yea, bump your PHP memory too and restart apache. It looks like it's using the default.

TheWitness

h1d3m3 · Post by **h1d3m3** » Fri Mar 06, 2009 7:19 pm

Did that. Thanks... So I have two questions about this:

1) What does "ERROR: the RRD does not contain an RRA matching the chosen CF " have to do with using the "last" value on the graph template?

2) Why can I not use derived for this? I'd rather see the delta values than the current values...for example I would rather see a graph that showed me a change from 10 to 30 (as a 20 spike) than the graph at 10 and then a change to 30. When I try to make the graph derived, I get NaN forever.

Thanks.

Cacti

Problem Where Nothing Will Plot On Graph

Problem Where Nothing Will Plot On Graph

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