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 mysql plugin silently fails

I installed this Munin MySQL plugin on a RHEL 6 machine and I'm experiencing a strange behavior. I'm not getting any data in the Munin web page (the Categories list does not show a mysql link), but ...
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21 views

Monitoring mysql with munin - worse MySQL performance?

If I monitor my MySQL server with munin, can I envisage with worse MySQL performance? When I want to activate statics as an example in PHPMyAdmin it says that the MySQL performance can be inferior as ...
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77 views

Is it possible to monitor JVM usage of Elasticsearch via Munin?

I'd like to use Munin to monitor the status of the JVM used by Elasticsearch, which is run via Java (output of ps follows): elastic+ 1083 1 3 09:29 ? 00:13:23 /usr/bin/java -Xms8g -Xmx8g ...
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44 views

Munin plugins for Elasticsearch v2.x

Is there any Munin plugin available for Elasticsearch v2.x ? I know that there are some for v1.x but these are not compatible with v2.x.
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34 views

Munin stopped sending email alerts

To check whether Munin email notifications are still functioning, I have changed temporarily the "warning" and "critical" threshold to a very low value, and restarted the munin-node service. To my ...
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86 views

Unable to zoom-in Munin graphs on CentOS

I have installed munin on my CentOS 6 system. The installation procedure is as follows: rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm yum --enablerepo=epel ...
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226 views

Very high I/O wait time on KVM virtual machine

Debian wheezy AMD64, 3 cores, 2560mb ram (virtual machine). 1 virtual drive on ext4, running on KVM. I decided to move it from raw to qcow2. Everything is ok and everything was going ok during ...
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1answer
152 views

Why is the config file in /etc/munin/plugin-conf.d/ ignored?

I have a Munin script /etc/munin/plugins/mysql_replag that queries a MySQL server to check the status of a master-slave replication: #!/bin/sh # Plugin to monitor the Seconds_Behind_Master of ...
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24 views

Munin graphs y-axis scale not consistent within time frames

We use Munin for monitoring but sometimes there's a strange inconsistency between daily, weekly, monthly, and yearly graphs. For instance, one of the parameters monitored is the MySQL replication ...
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204 views

Nginx and Munin via CGI, no CSS, no graphs

I'm new to Munin and Nginx. I've installed and configured Munin and created a Nginx server block. I can see the index page generated by munin, listing the different nodes. But when I click on a host ...
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374 views

How to check easily the munin alert-email-notification?

I run the munin monitoring application on my debian Wheezy server and I would like to test the alert-email-notification procedure. To do that, I add in munin.conf the following line: df._home.warning ...
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481 views

Why isn't munin's apache_accesses report accesses?

I have the ExtendedStatus enabled: $ grep ExtendedStatus /etc/apache2/mods-available/status.conf:ExtendedStatus On But the "munin suggest" says it's still off: root@SERVER:/etc/apache2# ...
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213 views

munin is not showing all Ethernet ports

I have an Ubuntu 12.04 running on a VmWare ESXi. I'm trying to run munin on the Linux system to show the status of the system. But in the network tab of munin only eth0 is shown even though ifconfig ...
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1answer
101 views

Munin doesn't show new host when using munin-cgi-html

A few months ago, I switched from running Munin in static munin-cron mode to dynamic munin-html-cgi mode, but now when I add a new host to monitor it, it doesn't show up in the generated HTML, even ...
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0answers
164 views

monitor running services and ports

What is the best way to monitor running services and ports on a system with systemd? My intent is to alert me, when a service stops running or if a new service is listening on a new port (possibly a ...
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3answers
5k views

How to disable DNS caching or override TTL for a certain hostname?

I've set up my own dynamic DNS service by using a script to automatically update the A record for a subdomain of one of my domains. The host with the dynamic IP address runs, among other things, a ...
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2answers
2k views

Error 404 Munin page not Found

I installed Munin and munin-node on Server and httpd was already installed. But after installed when i run the munin-node the Browser gives me this error. Not Found The requested URL /munin was not ...
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3answers
5k views

logrotate doesn't work for munin after last update on OpenSUSE 11.4

I'm using munin 1.4.5 on OpenSUSE 11.4. Lately logrotate was updated to fix some permission problems and after that complained with Mar 3 12:15:05 lucien logrotate: error: "/var/log/munin" has ...
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3answers
2k views

How do you choose which monitoring application to use?

Having a system for collecting performance statistics can be extremely useful. In the past, I've used Munin for this, and it has been invaluable in analyzing bottlenecks and various other issues. I ...
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3answers
765 views

How to track down memory spikes?

I have an app running on rackspace cloud (ubuntu 10.04). For some reason, over the last 3 nights, the memory has been spiking and then leveling off for about 7 hours before eventually falling off. ...