Munin is a networked resource monitoring tool that can help analyze resource trends and "what just happened to kill our performance?" problems.

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346 views

Disable graph_total in Munin Graphs

Is there any way to disable the graph_total for a Munin graph? For example, the apache_processes plugin generates a "total" line that becomes meaningless when there are multiple ports monitored. I'd ...
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1answer
1k views

Munin node not listing any plugins on new Fedora 14 installation

I have just installed munin-node from the base repo on Fedora 14 and then started it. I found that my munin server is not able to collect data from this node so I tried connecting via telnet to test. ...
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4answers
1k views

Stop Munin messages from /var/log/syslog

I am using munin on a system which is adding a log entry in syslog everytime the munin-node cron job executes. It is not an issue but it sometimes makes other errors spotting difficult. There are ...
3
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1answer
3k views

HTTP response time profiling

I have a nginx reverse proxy. The server is close to serving 600-700 requests per second. I have a Munin HTTP load time plugin which is outputting this: ...
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1answer
314 views

Munin FW_Conntrack Timing Out

I recently installed CSF firewall. Immediately after this, my Munin has stopped showing me graphs for Connections through firewall and ipconntrack. I looked into log files and found this ...
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2answers
3k views

Configure Munin graphs to show different time periods

I'm running a server with Munin installed through WHM cPanel. I've been googling around and I can't seem to find out how to do the following: A: Change a graph to show a different time period ...
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2answers
2k views

Munin graph size

Munin graphs is very small. That makes some multigrpahs useless for me. Is it possible to increase graph image size?
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1answer
733 views

RPM ERRORs on a cloud CentOS 5.5 server

I am attempting to add an rpm repo in order to Yum install a Munin node, however i keep getting the following error: rpm -Uvh ...
4
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1answer
5k views

how to get a total bandwidth graph in munin

I have munin-node in a basic default configuration on all my servers, I would like to create a summary chart that displays total bandwidth in/out http and another chart showing total bandwidth in/out ...
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2answers
471 views

Monitoring System for the cloud?

I need a monitoring system, much like ganglia / nagios that is build for the cloud. I need it to support : Adding / removing nodes dynamically. (Node shuts down, dose not imply node failure...) ...
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1answer
359 views

Apache Munin Graphs / Mod-Server-Status: Why Would There Be A Spike In Proceses But Not A Spike In Accesses

Our system just suffered through a huge surge in connections. Our load balancer graphs reflect this surge in connections. Netstat graphs reflect this surge in connections. Our Apache Processes ...
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2answers
1k views

Munin - Load old/historic data from a database to prepopulate the graphs?

I have a Munin setup that monitors some data from our database about the number of sales. My munin plugin extracts this data from the database with a query. I could run this query for any time in the ...
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2answers
699 views

Munin - 'by week/month/year' to use the total, rather than the average values?

I have some custom munin graphs that measure an aspect of our sales in our webapp. So I measure "Number of sales so far today". The graph goes up and then reset to 0 at midnight. This is what I want. ...
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2answers
1k views

Munin Graphs - Have one graph/plugin only update once per hour?

I am writing a custom munin plugin/graph and it's slightly computationally expensive. It's also unlikely to change much in a few minutes. Is it possible to have this one graph/plugin only update once ...
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2answers
1k views

Getting Pango-WARNING: Invalid UTF-8 string passed to pango_layout_set_text()

About three days ago, I noticed the exim mailqueue started filling up on one of my servers, and upon inspecting some of the emails using # exim -Mvb $ID, I noticed they were being sent to some system ...
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2answers
513 views

Stacking Munin graph plugins

Is there a simple way to stack existing plugin graphs and hide the originals? For example, I'd like to stack ping_ with say, ping_google.com and ping_amazon.com together. Do I need to write a new ...
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6answers
12k views

Nagios graphing solutions vs Munin/Cacti/Ganglia

I've got a nagios server setup for monitoring ~ 30 Windows servers. I want to add some trending charts. I've read that nagios graphing plugins are simple and many people use seperate, standalone ...
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1answer
2k views

Adjusting Munin's accept timeout

I have a Munin master that's contacting 5 nodes at the moment and I'm seeing one to two warnings like this in the munin-update.log. [WARNING] Call to accept timed out. Remaining workers: xyz;abc ...
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2answers
1k views

How do I run Munin plugins written in Ruby, using RVM?

I try to run some Munin plugins written in Ruby. I would like to use RVM, so Munin needs to know where to find Ruby. I tried to change the line calling munin-cron in the cron file as follows: */5 * * ...
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1answer
79 views

What group should a munin-node run as on MacOSX?

I'm installing a mac osx munin node, and the default value of User root Group root Produces an error that there is no 'root' group. What should the group be for a munin node?
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2answers
550 views

munin graph interpretation

I have a quick question. The following mysqlslowquerys / second graph marked 3 entries last day. http://img8.imageshack.us/i/picturert.png/ how do you interpret the peak legend? Is the peak ~3 ...
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1answer
626 views

MySQL per user monitoring

Is there a tool for monitoring per user MySQL usage? Like number of queries for example. I have been looking on Munin which I currently use, but did not find anything. A similar tool is the per user ...
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2answers
2k views

Munin apache plugin bad response

All my apache plugins returns the same value : /usr/share/munin/plugins# munin-run apache_volume volume443.value U Here is my config in /etc/munin/plugin-conf.d/munin-node [apache_*] env.ports ...
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2answers
145 views

MySQL sudden throughput increase

What could be the cause of a sudden increase in MySQL throughput (from an average of 1.5M/s to 7.5M/s). The system is running WordPress on a trafficked site (2M monthly pageviews). The throughput is ...
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1answer
142 views

Munin graph shows 3 Upgradable security packages (red alert) but apt does not install them

I'm using this munin plugin : http://exchange.munin-monitoring.org/plugins/apt_ubuntu/details The server is an ubuntu 10.04 up to date. So.. This is my munin server, which on its own munin graph ...
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1answer
1k views

Munin's fw_conntrack reports strange number of sockets in TIME_WAIT

Ubuntu Server 10.04.1 x86 Munin 1.4.4 Here is what Munin tells me about connections through firewall on my server: Here is what netstat -n has to say about this: $ netstat -an|awk '/tcp/ ...
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2answers
664 views

Munin on localhost (telnet only displays period)

I set up munin to run as root for testing, my relevant config is as so: munin.conf: [localhost] address 127.0.0.1 use_node_name yes I tried fqnd.mysite.com (but it couldn't connect), ...
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2answers
387 views

How to clean a garbage value in Munin

After I rebooted one of my servers, Munin (which runs on another server) seems to have picked up some garbage response from it in the process of rebooting. ...
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1answer
479 views

Munin locking Ubuntu with long processing times. How to fix?

I have been unable to work out what is happening here. I have attached the graphs below. and as you can see the processes just seem to climb inline with the Munin processing times leaping up. The ...
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3answers
1k views

Avoid Apache's mod_status being exposed by Varnish

An Ubuntu 9.04 box running Apache on 8080 and Varnish on 80. Recently set up Munin and was wondering why Apache graphs are empty. Saw from the logs that Munin is accessing /server-status?auto and ...
17
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4answers
11k views

How to reset munin graphs

I'd like to reset all graphs for a certain host in Munin. Anyone who knows how I can do this?
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4answers
675 views

Will running RRDtool or Cacti slow down my servers performance?

I'm consider running some performance profile tools like Cacti for my server, but I'm concerned that running RRDtool or Cacti slow down my servers performance? Is this a valid concern for me? Or ...
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1answer
2k views

How much memory can I safely assign to memcached?

I'm looking into using memcached on our server. We've just upgraded and now have a fairly powerful box: DELL PowerEdge R710 Linux RHEL 5 - 64bit 12GB RAM (We used to be on a 32bit 4GB box). The ...
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2answers
827 views

Munin, monitoring & emailed alerts

I've got several servers serving some websites. I've got Munin set up so I can track things like memory consumption, disk usage, etc. What I'd like to have now would be a way to get emails if ...
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1answer
1k views

Munin - apache_watch_ plugin, does not show any data in the graphs that shows activity for per vhosts

I am using Munin for monitoring my server. I installed the apache_watch_ plugin so that i could see apache related activity. The graphs for apache_accesses, apache_processes and apache_volume work ...
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1answer
734 views

Does Munin HTML output directory gets regenerated if I remove it?

I've made lots of changes in my Munin server, specially regrouping the different monitored servers. Same way I've already moved the .rrd files to the /var/lib/munin directories with the new layout. ...
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3answers
121 views

Network “monitoring” for Mac OS infrastructure

Is there any free (and preferably open source, but not mandatory) solution to know how much bandwidth each macintosh is using. I have munin on a Debian, monitoring multiple linux servers, but I ...
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2answers
320 views

Showing a longer timespan in Munin

I was wondering if it is possible for Munin to store and display data for longer than a year? I did Google around a bit, without much luck.
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2answers
761 views

Stripping a spike from rrdtool when removespike.pl doesn't find any

I know when rrdtool graphs (using rrdtool 1.4) network traffic and the host is restarted a spike is a pretty normal thing to see. In the past I've just run that removespike.pl script that is hosted ...
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1answer
1k views

Munin does not show Apache/mySQL stats in web view

I'm facing a very strange Problem. I just set up Munin on a fresh Ubuntu slice with a common LAMP Stack. Everything works great, except that Munin does just not show the Apache/mySQL stats in the web ...
2
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1answer
380 views

Munin fills server memory

In the last weeks, it happened several times to me that my vserver (Debian Lenny) was out of RAM (500M) and therefore wasn't able to run apache anymore. When looking at the processes with top, I saw ...
3
votes
3answers
1k views

Puppet, Nagios, Munin on cPanel based hosts

I've been managing 20-30~ cPanel based hosts over the past year with Puppet, Nagios and Munin for general monitoring / trending however a lot of the methods I've had to use to deploy / manage things ...
3
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6answers
2k views

Are there any tools for monitoring individual Apache virtual hosts in real-time?

I'm looking for a way to monitor and record Apache traffic, separated by virtual host. I am currently using Munin to capture this and other data for the entire server however I can't seem to find a ...
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1answer
2k views

Having munin server monitoring problem: Graphs not being generated

When I run munin-cron (munin-cron --debug), I get the following error: 2010/05/10 13:39:01 [WARNING] Call to accept timed out. Remaining workers: archstl.org;archstl.archstl.org 2010/05/10 13:39:01 ...
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3answers
4k views

debugging spiking netstat “failed connection attempts” with iptables

http://farm4.static.flickr.com/3305/4588110530_a60c934289_o.png This graph is munin collecting netstat -s output. I want to determine where the connections are coming from. There is nothing obvious ...
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1answer
1k views

munin to monitor apache hits on particular URLs

We are having a problem with our web application, and are currently monitoring performance via munin. We have defined a list of URLs that are causing problems, and am hoping for munin to find out from ...
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4answers
6k views

Munin-cron fails “Nothing to do”, possibly a munin.conf problem?

I have been working on this for a few hours now, and haven't yet been able to get munin to output the html files/generated graphs of resource usage on my CentOS 5.3 server. Here are some things I run ...
2
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1answer
252 views

install Munin on rhel4-32

# cat /proc/version > Linux version 2.6.9-023stab048.6-enterprise (root@rhel4-32) (gcc version 3.4.5 20051201 (Red Hat 3.4.5-2)) #1 SMP Mon Nov 17 19:09:18 MSK 2008 This is Redhat4, right? and i ...
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1answer
477 views

Apache log with Munin question

In Munin Graph: What is the meaning of 'apache accesses' and 'apache processes'? And what's the relation between them?
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2answers
4k views

Change a Munin server and keep the data

We are migrating some servers, and we need tp change our Munin server. Most of the Munin nodes are not changed, and we would want to keep track of the historical data, if possible. I can set up a ...