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Howto prevent ntopng causing out of disk space and inodes?

I've encountered a similar problem. One day df -ih shows that there is no free inodes on root partition. OS is Ubuntu 12.04. After some research I found that there is a lot of small .json files in /...
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3 votes
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RRD tool update using Time incorrect - illegal attempt to update

Since you are using N: rrdtool uses the system time. Such an error would mean that your system time has changed ... maybe some misconfiguration ... timezone set and the time re-adjusted for example ? ...
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  • 1,702
3 votes
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rrdtool: illegal attempt to update

Rrdtool create has the --start option which does what you need without changing time for whole system. Defaults to 10 seconds ago.
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  • 4,387
3 votes

What controls the Y-axis of data drawn into graphs?

RRDTool Automatically selects values by default that would allow multiple graphs that use similar data to look similar to each other. As mentioned in another answer (by TvE), these fall in the 1,2,5 ...
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  • 131
3 votes

What controls the Y-axis of data drawn into graphs?

Rrdtool graph has some "smarts" about the Y axis to prevent the labels all turning into weird numbers with odd decimals. So it prefers to go up to 2, 5, 10, 20, 50, etc. The docs describe this as "...
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  • 131
2 votes
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Load Average Graph Values in pnp4nagios less than 1.0 denoted by a value "m"

The m stands for milli, a prefix meaning 1/1000.
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2 votes
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rrdgraph generation fails on high IO load

I guess it's not the rrdtool that cannot update the graph, but rather data cannot be measured at this point. By the way, your method of measuring CPU and memory stats is just wrong, because it gives ...
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  • 7,954
2 votes

rrd data not same with insert data

Yes, this is because you are adding date at arbitrary points in time. While you have setup rrdtool to store data at regular 1 second intervals ... Updating your data with 'N:' records the precise ...
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  • 1,702
2 votes

Where to get RRDs.pm?

Running the following fixed this issue for me on RHEL6. yum install rrdtool-perl
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1 vote
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RRDTool Not Creating .RRD File

rrdtool graph takes an existing .rrd and should create (using your command) a colorful png image. If you'd like to create a .rrd file, that'd be rrdtool create ... maybe you're missing one more ...
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  • 470
1 vote

Install RRDtool 1.4.7 on CentOS 6

As the first failed dependency was: libdbi.so.0()(64bit), installing or updating libdbi would have been my first suggestion.
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  • 466
1 vote

Install RRDtool 1.4.7 on CentOS 6

Downloaded https://pkgs.org/centos-6/repoforge-x86_64/rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm.html and installed it. I was able to install RRD tools by using the command yum -y --enablerepo='...
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1 vote

Using multiple instances of rrdcached on a single server?

For anyone facing the same problem: cat /etc/sysconfig/rrdcached OPTIONS="-w 1800 -z 1800 -f 3600 -s apache -l unix:/var/run/rrdcached/rrdcached.sock -j /var/tmp/ -F -b /opt/observium/rrd/" RRDC_USER=...
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  • 21
1 vote
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Using MAXNAN to aid aggregrating multiple rrd databases

Normally, I write a StackOverflow question and discover the answer before submitting. In this case, the answer came just afterwards. MAXNAN was added in rrdtool 1.4.9 and I'm using 1.4.7 I can do ...
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  • 1,396
1 vote

rrdtool: illegal attempt to update

Before creating the database, I needed to change my system time. Set system time so that it was earlier than the first timestamp in my dataset. In my case: 1404249680 (2014-07-02T21:21 in ISO format)...
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1 vote

Text in munin graphs corrupted

This could either be a problem with rrd, or a munin plugin. Check the munin-graph.log and see if you have anything like this; [RRD ERROR] Unable to graph <filename> : failed to load : failed to ...
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1 vote
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rrddtool unknown_sec 7 and no vaules in rrd file

You specified a max speed of ds[wanspeed].max = 1.2000000000e+05 while your last update was ds[wanspeed].last_ds = "981976" and since 981,976 > 120,000 rrdtool refuses the update stores NAN. In ...
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  • 1,702
1 vote

tune rrd to increase step and heartbeat (x2)

The Heartbeat only specifies the amount of time that can pass between two consecutive updates for rrdtool to still consider the time BETWEEN the updates to contain valid data. So if you simply want to ...
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  • 1,702
1 vote

What controls the Y-axis of data drawn into graphs?

Most likely what's happening is you have (an anomalous) spike in your rrd file but graph's resolution is not granular enough to display it. Consider using some tool to scan your file and remove such ...
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  • 2,302
1 vote
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Why are my GPRINT directives not being drawn into my graphs?

According to a thread on monitorin-portal.org, this is an issue introduced in the latest (and last ever) version 1.7.1 of NagiosGrapher. There seems to be a bug in rrd2-graph.cgi. The file contains a ...
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