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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Munin Aggregate Graph

I am trying to aggregate munin graphs (http://munin-monitoring.org/wiki/aggregate_examples) for my nginx_request plugin (http://exchange.munin-monitoring.org/plugins/nginx_request/version/2) The ...
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3answers
1k views

Munin Aggregate Graphs from several servers

I am using DNS round robin load balancing and have divided my total traffic onto multiple servers. Each server does around 300-400req/second but I am interested in having an aggregate graph telling me ...
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1answer
370 views

Problem: Munin Graph

I've been trying to install Munin for 15 days, I looked for information, analized logs, I even deleted and reinstalled Munin using YUM. I'm hosted at Media Temple on a VPS with CentOS. The problem is ...
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2answers
702 views

Best plugin for tracking Apache response codes with Munin

I'd like to monitor the rate of 404, 403, 500 etc errors in my Apache logs with Munin but I can't find a plugin to do this. Surely it exists?
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1answer
90 views

is there any problem with my server

Below is a Munin Service Monitor screenshot for netstat by day which have a lot of failed connection. so I need to know is this a serious issue?
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1answer
350 views

Does jmxremote affect tomcat performance?

I'd like to enable jmxremote to monitor Apache Tomcat resources utilization with Munin, but I want to know if this will affect the servers performance, is so, how much will it be impacted.
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1answer
760 views

How can I use munin-node apache_ with basic authentication?

munin-node-configure --suggest tells me that the apache_* nodes cannot be used: apache_accesses | no | no [Port 80: Authorization Required] apache_processes | no | no ...
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1answer
122 views

VPS (LAMP) Runs out of memory every so often

I have a VPS on CentOS 5, running LAMP. Twice now in the last 3 months the server has had to be rebooted due to being out of memory. Downtime ends up being an hour, before someone can look at it. I ...
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2answers
2k views

Munin access to MySQL

According to several tutorials, the following should work: Create a new user in MySQL. $ mysql -uroot -p > CREATE USER 'munin'@'localhost'; > exit; Use that user in munin to access the ...
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0answers
3k views

Installed Munin on CentOS, but it does not generate data

I've installed Munin on CentOS, in Munin directory, it only has a few files and I could not see the website data. The Munin log shows the connection to 127.0.0.1 was refused. I have tried to disable ...
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3answers
2k views

Removing a spike from RRDTool database

I've got an RRDtool graph that has a huge spike after a reboot. I've tried using the popular removespikes.pl script on it, but just returns a "No peaks found.!". What's the best way to take care of ...
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5answers
9k views

I need to replace munin with something more scalable [closed]

I have used munin on multiple servers for many years with great success, however with more than 100 munin-nodes and when there is load on the clients, the processing is timing out. I have made some ...
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2answers
3k views

Monitoring Nginx vhosts with Munin

I've set up Munin and so far, loving it. I got some basic Nginx monitoring set up and am able to monitor Nginx's status and RAM usage (with stub_status compiled into Nginx and activated in the ...
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410 views

How to interpret these munin stats of nginx?

The following stats are from a site where nginx was placed in front of a webserver to deliver static files and let the CMS application on the legacy webserver focus on the dynamic work. This is done ...
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1answer
160 views

Possible causes for large drop in measured firewall throughput

We run our application on ec2 and use Munin to monitor various metrics. We do a bi-weekly fresh deploy on new ec2 + rds instances. After our most recent fresh deploy, we noticed a 4x reduction in the ...
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1answer
542 views

Trying to move munin master from one debian server to another

I am trying to move munin master node from one debian server to another and preserve the history graphs, how could I proceed (maybe someone can write the instruction on munin wiki website). Regards, ...
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1answer
986 views

How to migrate Munin graph history

I have a pretty basic munin configuration, with a host in my munin.conf like this [old;name] and a Plugin, that gives host_name: name I changed the munin.conf to [new;name] the host_name in ...
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1answer
373 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
2k 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 ...
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1answer
4k 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
352 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
4k 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
3k 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
861 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
6k 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
482 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
371 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
754 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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3answers
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
2k 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
612 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
14k 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
80 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
631 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
949 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
159 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
161 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
827 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), ...
2
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2answers
422 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. ...
0
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1answer
557 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
2k 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 ...
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4answers
14k 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
760 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 ...